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apache / freemarker / 3944629f4be469207133615f353baf0170bfe372 / . / src / main / java / freemarker / core / Environment.java
blob: 3d61aaa50e7249197eb57a892d53450f50160399 [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package freemarker.core;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.Collator;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.TimeZone;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import freemarker.cache.TemplateNameFormat;
import freemarker.cache._CacheAPI;
import freemarker.ext.beans.BeansWrapper;
import freemarker.log.Logger;
import freemarker.template.Configuration;
import freemarker.template.MalformedTemplateNameException;
import freemarker.template.ObjectWrapper;
import freemarker.template.SimpleHash;
import freemarker.template.SimpleSequence;
import freemarker.template.Template;
import freemarker.template.TemplateCollectionModel;
import freemarker.template.TemplateDateModel;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import freemarker.template.TemplateHashModel;
import freemarker.template.TemplateHashModelEx;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateModelIterator;
import freemarker.template.TemplateNodeModel;
import freemarker.template.TemplateNumberModel;
import freemarker.template.TemplateScalarModel;
import freemarker.template.TemplateSequenceModel;
import freemarker.template.TemplateTransformModel;
import freemarker.template.TransformControl;
import freemarker.template._TemplateAPI;
import freemarker.template.utility.DateUtil;
import freemarker.template.utility.DateUtil.DateToISO8601CalendarFactory;
import freemarker.template.utility.NullWriter;
import freemarker.template.utility.StringUtil;
import freemarker.template.utility.UndeclaredThrowableException;
/**
* Object that represents the runtime environment during template processing. For every invocation of a
* <tt>Template.process()</tt> method, a new instance of this object is created, and then discarded when
* <tt>process()</tt> returns. This object stores the set of temporary variables created by the template, the value of
* settings set by the template, the reference to the data model root, etc. Everything that is needed to fulfill the
* template processing job.
*
* <p>
* Data models that need to access the <tt>Environment</tt> object that represents the template processing on the
* current thread can use the {@link #getCurrentEnvironment()} method.
*
* <p>
* If you need to modify or read this object before or after the <tt>process</tt> call, use
* {@link Template#createProcessingEnvironment(Object rootMap, Writer out, ObjectWrapper wrapper)}
*/
public final class Environment extends Configurable {
private static final ThreadLocal threadEnv = new ThreadLocal();
private static final Logger LOG = Logger.getLogger("freemarker.runtime");
private static final Logger ATTEMPT_LOGGER = Logger.getLogger("freemarker.runtime.attempt");
// Do not use this object directly; clone it first! DecimalFormat isn't
// thread-safe.
private static final DecimalFormat C_NUMBER_FORMAT = new DecimalFormat(
"0.################",
new DecimalFormatSymbols(Locale.US));
static {
C_NUMBER_FORMAT.setGroupingUsed(false);
C_NUMBER_FORMAT.setDecimalSeparatorAlwaysShown(false);
}
private final Configuration configuration;
private final TemplateHashModel rootDataModel;
private TemplateElement[] instructionStack = new TemplateElement[16];
private int instructionStackSize = 0;
private final ArrayList recoveredErrorStack = new ArrayList();
private TemplateNumberFormat cachedTemplateNumberFormat;
private Map<String, TemplateNumberFormat> cachedTemplateNumberFormats;
/**
* Stores the date/time/date-time formatters that are used when no format is explicitly given at the place of
* formatting. That is, in situations like ${lastModified} or even ${lastModified?date}, but not in situations like
* ${lastModified?string.iso}.
*
* <p>
* The index of the array is calculated from what kind of formatter we want (see
* {@link #getTemplateDateFormatCacheArrayIndex(int, boolean, boolean)}):<br>
* Zoned input: 0: U, 1: T, 2: D, 3: DT<br>
* Zoneless input: 4: U, 5: T, 6: D, 7: DT<br>
* SQL D T TZ + Zoned input: 8: U, 9: T, 10: D, 11: DT<br>
* SQL D T TZ + Zoneless input: 12: U, 13: T, 14: D, 15: DT
*
* <p>
* This is a lazily filled cache. It starts out as {@code null}, then when first needed the array will be created.
* The array elements also start out as {@code null}-s, and they are filled as the particular kind of formatter is
* first needed.
*/
private TemplateDateFormat[] cachedTempDateFormatArray;
/** Similar to {@link #cachedTempDateFormatArray}, but used when a formatting string was specified. */
private HashMap<String, TemplateDateFormat>[] cachedTempDateFormatsByFmtStrArray;
private static final int CACHED_TDFS_ZONELESS_INPUT_OFFS = 4;
private static final int CACHED_TDFS_SQL_D_T_TZ_OFFS = CACHED_TDFS_ZONELESS_INPUT_OFFS * 2;
private static final int CACHED_TDFS_LENGTH = CACHED_TDFS_SQL_D_T_TZ_OFFS * 2;
/** Caches the result of {@link #isSQLDateAndTimeTimeZoneSameAsNormal()}. */
private Boolean cachedSQLDateAndTimeTimeZoneSameAsNormal;
private NumberFormat cNumberFormat;
/**
* Used by the "iso_" built-ins to accelerate formatting.
*
* @see #getISOBuiltInCalendarFactory()
*/
private DateToISO8601CalendarFactory isoBuiltInCalendarFactory;
private Collator cachedCollator;
private Writer out;
private Macro.Context currentMacroContext;
private LocalContextStack localContextStack;
private final Namespace mainNamespace;
private Namespace currentNamespace, globalNamespace;
private HashMap loadedLibs;
private Configurable legacyParent;
private boolean inAttemptBlock;
private Throwable lastThrowable;
private TemplateModel lastReturnValue;
private HashMap macroToNamespaceLookup = new HashMap();
private TemplateNodeModel currentVisitorNode;
private TemplateSequenceModel nodeNamespaces;
// Things we keep track of for the fallback mechanism.
private int nodeNamespaceIndex;
private String currentNodeName, currentNodeNS;
private String cachedURLEscapingCharset;
private boolean cachedURLEscapingCharsetSet;
private boolean fastInvalidReferenceExceptions;
/**
* Retrieves the environment object associated with the current thread, or {@code null} if there's no template
* processing going on in this thread. Data model implementations that need access to the environment can call this
* method to obtain the environment object that represents the template processing that is currently running on the
* current thread.
*/
public static Environment getCurrentEnvironment() {
return (Environment) threadEnv.get();
}
static void setCurrentEnvironment(Environment env) {
threadEnv.set(env);
}
public Environment(Template template, final TemplateHashModel rootDataModel, Writer out) {
super(template);
configuration = template.getConfiguration();
this.globalNamespace = new Namespace(null);
this.currentNamespace = mainNamespace = new Namespace(template);
this.out = out;
this.rootDataModel = rootDataModel;
importMacros(template);
}
/**
* Despite its name it just returns {@link #getParent()}. If {@link Configuration#getIncompatibleImprovements()} is
* at least 2.3.22, then that will be the same as {@link #getMainTemplate()}. Otherwise the returned value follows
* the {@link Environment} parent switchings that occur at {@code #include}/{@code #import} and {@code #nested}
* directive calls, that is, it's not very meaningful outside FreeMarker internals.
*
* @deprecated Use {@link #getMainTemplate()} instead (or {@link #getCurrentNamespace()} and then
* {@link Namespace#getTemplate()}); the value returned by this method is often not what you expect when
* it comes to macro/function invocations.
*/
@Deprecated
public Template getTemplate() {
return (Template) getParent();
}
/** Returns the same value as pre-IcI 2.3.22 getTemplate() did. */
Template getTemplate230() {
Template legacyParent = (Template) this.legacyParent;
return legacyParent != null ? legacyParent : getTemplate();
}
/**
* Returns the topmost {@link Template}, with other words, the one for which this {@link Environment} was created.
* That template will never change, like {@code #include} or macro calls don't change it.
*
* @see #getCurrentNamespace()
*
* @since 2.3.22
*/
public Template getMainTemplate() {
return mainNamespace.getTemplate();
}
/**
* Returns the {@link Template} that we are "lexically" inside at the moment. This template will change when
* entering an {@code #include} or calling a macro or function in another template, or returning to yet another
* template with {@code #nested}. As such, it's useful in {@link TemplateDirectiveModel} to find out if from where
* the directive was called from.
*
* @see #getMainTemplate()
* @see #getCurrentNamespace()
*
* @since 2.3.23
*/
@SuppressFBWarnings(value = "RANGE_ARRAY_INDEX", justification = "False alarm")
public Template getCurrentTemplate() {
int ln = instructionStackSize;
return ln == 0 ? getMainTemplate() : instructionStack[ln - 1].getTemplate();
}
/**
* Gets the currently executing <em>custom</em> directive's call place information, or {@code null} if there's no
* executing custom directive. This currently only works for calls made from templates with the {@code <@...>}
* syntax. This should only be called from the {@link TemplateDirectiveModel} that was invoked with {@code <@...>},
* otherwise its return value is not defined by this API (it's usually {@code null}).
*
* @since 2.3.22
*/
@SuppressFBWarnings(value = "RANGE_ARRAY_INDEX", justification = "False alarm")
public DirectiveCallPlace getCurrentDirectiveCallPlace() {
int ln = instructionStackSize;
if (ln == 0) return null;
TemplateElement te = instructionStack[ln - 1];
if (te instanceof UnifiedCall) return (UnifiedCall) te;
if (te instanceof Macro && ln > 1 && instructionStack[ln - 2] instanceof UnifiedCall) {
return (UnifiedCall) instructionStack[ln - 2];
}
return null;
}
/**
* Deletes cached values that meant to be valid only during a single template execution.
*/
private void clearCachedValues() {
cachedTemplateNumberFormats = null;
cachedTemplateNumberFormat = null;
cachedTempDateFormatArray = null;
cachedTempDateFormatsByFmtStrArray = null;
cachedCollator = null;
cachedURLEscapingCharset = null;
cachedURLEscapingCharsetSet = false;
}
/**
* Processes the template to which this environment belongs to.
*/
public void process() throws TemplateException, IOException {
Object savedEnv = threadEnv.get();
threadEnv.set(this);
try {
// Cached values from a previous execution are possibly outdated.
clearCachedValues();
try {
doAutoImportsAndIncludes(this);
visit(getTemplate().getRootTreeNode());
// It's here as we must not flush if there was an exception.
if (getAutoFlush()) {
out.flush();
}
} finally {
// It's just to allow the GC to free memory...
clearCachedValues();
}
} finally {
threadEnv.set(savedEnv);
}
}
/**
* "Visit" the template element.
*/
void visit(TemplateElement element) throws IOException, TemplateException {
// ATTENTION: This method body is manually "inlined" into visit(TemplateElement[]); keep them in sync!
pushElement(element);
try {
TemplateElement[] templateElementsToVisit = element.accept(this);
if (templateElementsToVisit != null) {
for (TemplateElement el : templateElementsToVisit) {
if (el == null) {
break; // Skip unused trailing buffer capacity
}
visit(el);
}
}
} catch (TemplateException te) {
handleTemplateException(te);
} finally {
popElement();
}
// ATTENTION: This method body above is manually "inlined" into visit(TemplateElement[]); keep them in sync!
}
/**
* @param elementBuffer
* The elements to visit; might contains trailing {@code null}-s. Can be {@code null}.
*
* @since 2.3.24
*/
final void visit(TemplateElement[] elementBuffer) throws IOException, TemplateException {
if (elementBuffer == null) {
return;
}
for (TemplateElement element : elementBuffer) {
if (element == null) {
break; // Skip unused trailing buffer capacity
}
// ATTENTION: This part is the manually "inlining" of visit(TemplateElement[]); keep them in sync!
// We don't just let Hotspot to do it, as we want a hard guarantee regarding maximum stack usage.
pushElement(element);
try {
TemplateElement[] templateElementsToVisit = element.accept(this);
if (templateElementsToVisit != null) {
for (TemplateElement el : templateElementsToVisit) {
if (el == null) {
break; // Skip unused trailing buffer capacity
}
visit(el);
}
}
} catch (TemplateException te) {
handleTemplateException(te);
} finally {
popElement();
}
// ATTENTION: This part above is the manually "inlining" of visit(TemplateElement[]); keep them in sync!
}
}
@SuppressFBWarnings(value = "RANGE_ARRAY_INDEX", justification = "Not called when stack is empty")
private TemplateElement replaceTopElement(TemplateElement element) {
return instructionStack[instructionStackSize - 1] = element;
}
private static final TemplateModel[] NO_OUT_ARGS = new TemplateModel[0];
/**
* @deprecated Should be internal API
*/
@Deprecated
public void visit(final TemplateElement element,
TemplateDirectiveModel directiveModel, Map args,
final List bodyParameterNames) throws TemplateException, IOException {
visit(new TemplateElement[] { element }, directiveModel, args, bodyParameterNames);
}
void visit(final TemplateElement[] childBuffer,
TemplateDirectiveModel directiveModel, Map args,
final List bodyParameterNames) throws TemplateException, IOException {
TemplateDirectiveBody nested;
if (childBuffer == null) {
nested = null;
} else {
nested = new NestedElementTemplateDirectiveBody(childBuffer);
}
final TemplateModel[] outArgs;
if (bodyParameterNames == null || bodyParameterNames.isEmpty()) {
outArgs = NO_OUT_ARGS;
} else {
outArgs = new TemplateModel[bodyParameterNames.size()];
}
if (outArgs.length > 0) {
pushLocalContext(new LocalContext() {
public TemplateModel getLocalVariable(String name) {
int index = bodyParameterNames.indexOf(name);
return index != -1 ? outArgs[index] : null;
}
public Collection getLocalVariableNames() {
return bodyParameterNames;
}
});
}
try {
directiveModel.execute(this, args, outArgs, nested);
} finally {
if (outArgs.length > 0) {
localContextStack.pop();
}
}
}
/**
* "Visit" the template element, passing the output through a TemplateTransformModel
*
* @param elementBuffer
* the element to visit through a transform; might contains trailing {@code null}-s
* @param transform
* the transform to pass the element output through
* @param args
* optional arguments fed to the transform
*/
void visitAndTransform(TemplateElement[] elementBuffer,
TemplateTransformModel transform,
Map args)
throws TemplateException, IOException {
try {
Writer tw = transform.getWriter(out, args);
if (tw == null) tw = EMPTY_BODY_WRITER;
TransformControl tc = tw instanceof TransformControl
? (TransformControl) tw
: null;
Writer prevOut = out;
out = tw;
try {
if (tc == null || tc.onStart() != TransformControl.SKIP_BODY) {
do {
visit(elementBuffer);
} while (tc != null && tc.afterBody() == TransformControl.REPEAT_EVALUATION);
}
} catch (Throwable t) {
try {
if (tc != null) {
tc.onError(t);
} else {
throw t;
}
} catch (TemplateException e) {
throw e;
} catch (IOException e) {
throw e;
} catch (RuntimeException e) {
throw e;
} catch (Error e) {
throw e;
} catch (Throwable e) {
throw new UndeclaredThrowableException(e);
}
} finally {
out = prevOut;
tw.close();
}
} catch (TemplateException te) {
handleTemplateException(te);
}
}
/**
* Visit a block using buffering/recovery
*/
void visitAttemptRecover(
AttemptBlock attemptBlock, TemplateElement attemptedSection, RecoveryBlock recoverySection)
throws TemplateException, IOException {
Writer prevOut = this.out;
StringWriter sw = new StringWriter();
this.out = sw;
TemplateException thrownException = null;
boolean lastFIRE = setFastInvalidReferenceExceptions(false);
boolean lastInAttemptBlock = inAttemptBlock;
try {
inAttemptBlock = true;
visit(attemptedSection);
} catch (TemplateException te) {
thrownException = te;
} finally {
inAttemptBlock = lastInAttemptBlock;
setFastInvalidReferenceExceptions(lastFIRE);
this.out = prevOut;
}
if (thrownException != null) {
if (ATTEMPT_LOGGER.isDebugEnabled()) {
ATTEMPT_LOGGER.debug("Error in attempt block " +
attemptBlock.getStartLocationQuoted(), thrownException);
}
try {
recoveredErrorStack.add(thrownException);
visit(recoverySection);
} finally {
recoveredErrorStack.remove(recoveredErrorStack.size() - 1);
}
} else {
out.write(sw.toString());
}
}
String getCurrentRecoveredErrorMessage() throws TemplateException {
if (recoveredErrorStack.isEmpty()) {
throw new _MiscTemplateException(this, ".error is not available outside of a #recover block");
}
return ((Throwable) recoveredErrorStack.get(recoveredErrorStack.size() - 1)).getMessage();
}
/**
* Tells if we are inside an <tt>#attempt</tt> block (but before <tt>#recover</tt>). This can be useful for
* {@link TemplateExceptionHandler}-s, as then they may don't want to print the error to the output, as
* <tt>#attempt</tt> will roll it back anyway.
*
* @since 2.3.20
*/
public boolean isInAttemptBlock() {
return inAttemptBlock;
}
/**
* Used for {@code #nested}.
*/
void invokeNestedContent(BodyInstruction.Context bodyCtx) throws TemplateException, IOException {
Macro.Context invokingMacroContext = getCurrentMacroContext();
LocalContextStack prevLocalContextStack = localContextStack;
TemplateElement[] nestedContentBuffer = invokingMacroContext.nestedContentBuffer;
if (nestedContentBuffer != null) {
this.currentMacroContext = invokingMacroContext.prevMacroContext;
currentNamespace = invokingMacroContext.nestedContentNamespace;
final Configurable prevParent;
final boolean parentReplacementOn = isBeforeIcI2322();
prevParent = getParent();
if (parentReplacementOn) {
setParent(currentNamespace.getTemplate());
} else {
legacyParent = currentNamespace.getTemplate();
}
this.localContextStack = invokingMacroContext.prevLocalContextStack;
if (invokingMacroContext.nestedContentParameterNames != null) {
pushLocalContext(bodyCtx);
}
try {
visit(nestedContentBuffer);
} finally {
if (invokingMacroContext.nestedContentParameterNames != null) {
localContextStack.pop();
}
this.currentMacroContext = invokingMacroContext;
currentNamespace = getMacroNamespace(invokingMacroContext.getMacro());
if (parentReplacementOn) {
setParent(prevParent);
} else {
legacyParent = prevParent;
}
this.localContextStack = prevLocalContextStack;
}
}
}
/**
* "visit" an IteratorBlock
*/
boolean visitIteratorBlock(IteratorBlock.IterationContext ictxt)
throws TemplateException, IOException {
pushLocalContext(ictxt);
try {
return ictxt.accept(this);
} catch (TemplateException te) {
handleTemplateException(te);
return true;
} finally {
localContextStack.pop();
}
}
/**
* Used for {@code #visit} and {@code #recurse}.
*/
void invokeNodeHandlerFor(TemplateNodeModel node, TemplateSequenceModel namespaces)
throws TemplateException, IOException {
if (nodeNamespaces == null) {
SimpleSequence ss = new SimpleSequence(1);
ss.add(currentNamespace);
nodeNamespaces = ss;
}
int prevNodeNamespaceIndex = this.nodeNamespaceIndex;
String prevNodeName = this.currentNodeName;
String prevNodeNS = this.currentNodeNS;
TemplateSequenceModel prevNodeNamespaces = nodeNamespaces;
TemplateNodeModel prevVisitorNode = currentVisitorNode;
currentVisitorNode = node;
if (namespaces != null) {
this.nodeNamespaces = namespaces;
}
try {
TemplateModel macroOrTransform = getNodeProcessor(node);
if (macroOrTransform instanceof Macro) {
invoke((Macro) macroOrTransform, null, null, null, null);
} else if (macroOrTransform instanceof TemplateTransformModel) {
visitAndTransform(null, (TemplateTransformModel) macroOrTransform, null);
} else {
String nodeType = node.getNodeType();
if (nodeType != null) {
// If the node's type is 'text', we just output it.
if ((nodeType.equals("text") && node instanceof TemplateScalarModel)) {
out.write(((TemplateScalarModel) node).getAsString());
} else if (nodeType.equals("document")) {
recurse(node, namespaces);
}
// We complain here, unless the node's type is 'pi', or "comment" or "document_type", in which case
// we just ignore it.
else if (!nodeType.equals("pi")
&& !nodeType.equals("comment")
&& !nodeType.equals("document_type")) {
throw new _MiscTemplateException(
this, noNodeHandlerDefinedDescription(node, node.getNodeNamespace(), nodeType));
}
} else {
throw new _MiscTemplateException(
this, noNodeHandlerDefinedDescription(node, node.getNodeNamespace(), "default"));
}
}
} finally {
this.currentVisitorNode = prevVisitorNode;
this.nodeNamespaceIndex = prevNodeNamespaceIndex;
this.currentNodeName = prevNodeName;
this.currentNodeNS = prevNodeNS;
this.nodeNamespaces = prevNodeNamespaces;
}
}
private Object[] noNodeHandlerDefinedDescription(
TemplateNodeModel node, String ns, String nodeType)
throws TemplateModelException {
String nsPrefix;
if (ns != null) {
if (ns.length() > 0) {
nsPrefix = " and namespace ";
} else {
nsPrefix = " and no namespace";
}
} else {
nsPrefix = "";
ns = "";
}
return new Object[] { "No macro or directive is defined for node named ",
new _DelayedJQuote(node.getNodeName()), nsPrefix, ns,
", and there is no fallback handler called @", nodeType, " either." };
}
void fallback() throws TemplateException, IOException {
TemplateModel macroOrTransform = getNodeProcessor(currentNodeName, currentNodeNS, nodeNamespaceIndex);
if (macroOrTransform instanceof Macro) {
invoke((Macro) macroOrTransform, null, null, null, null);
} else if (macroOrTransform instanceof TemplateTransformModel) {
visitAndTransform(null, (TemplateTransformModel) macroOrTransform, null);
}
}
/**
* Calls the macro or function with the given arguments and nested block.
*/
void invoke(Macro macro,
Map namedArgs, List positionalArgs,
List bodyParameterNames, TemplateElement[] childBuffer) throws TemplateException, IOException {
if (macro == Macro.DO_NOTHING_MACRO) {
return;
}
pushElement(macro);
try {
final Macro.Context macroCtx = macro.new Context(this, childBuffer, bodyParameterNames);
setMacroContextLocalsFromArguments(macroCtx, macro, namedArgs, positionalArgs);
final Macro.Context prevMacroCtx = currentMacroContext;
currentMacroContext = macroCtx;
final LocalContextStack prevLocalContextStack = localContextStack;
localContextStack = null;
final Namespace prevNamespace = currentNamespace;
currentNamespace = (Namespace) macroToNamespaceLookup.get(macro);
try {
macroCtx.sanityCheck(this);
visit(macro.getChildBuffer());
} catch (ReturnInstruction.Return re) {
// Not an error, just a <#return>
} catch (TemplateException te) {
handleTemplateException(te);
} finally {
currentMacroContext = prevMacroCtx;
localContextStack = prevLocalContextStack;
currentNamespace = prevNamespace;
}
} finally {
popElement();
}
}
/**
* Sets the local variables corresponding to the macro call arguments in the macro context.
*/
private void setMacroContextLocalsFromArguments(
final Macro.Context macroCtx,
final Macro macro,
final Map namedArgs, final List positionalArgs) throws TemplateException, _MiscTemplateException {
String catchAllParamName = macro.getCatchAll();
if (namedArgs != null) {
final SimpleHash catchAllParamValue;
if (catchAllParamName != null) {
catchAllParamValue = new SimpleHash((ObjectWrapper) null);
macroCtx.setLocalVar(catchAllParamName, catchAllParamValue);
} else {
catchAllParamValue = null;
}
for (Iterator it = namedArgs.entrySet().iterator(); it.hasNext();) {
final Map.Entry argNameAndValExp = (Map.Entry) it.next();
final String argName = (String) argNameAndValExp.getKey();
final boolean isArgNameDeclared = macro.hasArgNamed(argName);
if (isArgNameDeclared || catchAllParamName != null) {
Expression argValueExp = (Expression) argNameAndValExp.getValue();
TemplateModel argValue = argValueExp.eval(this);
if (isArgNameDeclared) {
macroCtx.setLocalVar(argName, argValue);
} else {
catchAllParamValue.put(argName, argValue);
}
} else {
throw new _MiscTemplateException(this,
(macro.isFunction() ? "Function " : "Macro "), new _DelayedJQuote(macro.getName()),
" has no parameter with name ", new _DelayedJQuote(argName), ".");
}
}
} else if (positionalArgs != null) {
final SimpleSequence catchAllParamValue;
if (catchAllParamName != null) {
catchAllParamValue = new SimpleSequence((ObjectWrapper) null);
macroCtx.setLocalVar(catchAllParamName, catchAllParamValue);
} else {
catchAllParamValue = null;
}
String[] argNames = macro.getArgumentNamesInternal();
final int argsCnt = positionalArgs.size();
if (argNames.length < argsCnt && catchAllParamName == null) {
throw new _MiscTemplateException(this,
(macro.isFunction() ? "Function " : "Macro "), new _DelayedJQuote(macro.getName()),
" only accepts ", new _DelayedToString(argNames.length), " parameters, but got ",
new _DelayedToString(argsCnt), ".");
}
for (int i = 0; i < argsCnt; i++) {
Expression argValueExp = (Expression) positionalArgs.get(i);
TemplateModel argValue = argValueExp.eval(this);
try {
if (i < argNames.length) {
String argName = argNames[i];
macroCtx.setLocalVar(argName, argValue);
} else {
catchAllParamValue.add(argValue);
}
} catch (RuntimeException re) {
throw new _MiscTemplateException(re, this);
}
}
}
}
/**
* Defines the given macro in the current namespace (doesn't call it).
*/
void visitMacroDef(Macro macro) {
macroToNamespaceLookup.put(macro, currentNamespace);
currentNamespace.put(macro.getName(), macro);
}
Namespace getMacroNamespace(Macro macro) {
return (Namespace) macroToNamespaceLookup.get(macro);
}
void recurse(TemplateNodeModel node, TemplateSequenceModel namespaces)
throws TemplateException, IOException {
if (node == null) {
node = this.getCurrentVisitorNode();
if (node == null) {
throw new _TemplateModelException(
"The target node of recursion is missing or null.");
}
}
TemplateSequenceModel children = node.getChildNodes();
if (children == null) return;
for (int i = 0; i < children.size(); i++) {
TemplateNodeModel child = (TemplateNodeModel) children.get(i);
if (child != null) {
invokeNodeHandlerFor(child, namespaces);
}
}
}
Macro.Context getCurrentMacroContext() {
return currentMacroContext;
}
private void handleTemplateException(TemplateException templateException)
throws TemplateException {
// Logic to prevent double-handling of the exception in
// nested visit() calls.
if (lastThrowable == templateException) {
throw templateException;
}
lastThrowable = templateException;
// Log the exception, if logTemplateExceptions isn't false. However, even if it's false, if we are inside
// an #attempt block, it has to be logged, as it certainly won't bubble up to the caller of FreeMarker.
if (LOG.isErrorEnabled() && (isInAttemptBlock() || getLogTemplateExceptions())) {
LOG.error("Error executing FreeMarker template", templateException);
}
// Stop exception is not passed to the handler, but
// explicitly rethrown.
if (templateException instanceof StopException) {
throw templateException;
}
// Finally, pass the exception to the handler
getTemplateExceptionHandler().handleTemplateException(templateException, this, out);
}
@Override
public void setTemplateExceptionHandler(TemplateExceptionHandler templateExceptionHandler) {
super.setTemplateExceptionHandler(templateExceptionHandler);
lastThrowable = null;
}
@Override
public void setLocale(Locale locale) {
Locale prevLocale = getLocale();
super.setLocale(locale);
if (!locale.equals(prevLocale)) {
cachedTemplateNumberFormats = null;
if (cachedTemplateNumberFormat != null && cachedTemplateNumberFormat.isLocaleBound()) {
cachedTemplateNumberFormat = null;
}
if (cachedTempDateFormatArray != null) {
for (int i = 0; i < CACHED_TDFS_LENGTH; i++) {
final TemplateDateFormat f = cachedTempDateFormatArray[i];
if (f != null && f.isLocaleBound()) {
cachedTempDateFormatArray[i] = null;
}
}
}
cachedTempDateFormatsByFmtStrArray = null;
cachedCollator = null;
}
}
@Override
public void setTimeZone(TimeZone timeZone) {
TimeZone prevTimeZone = getTimeZone();
super.setTimeZone(timeZone);
if (!timeZone.equals(prevTimeZone)) {
if (cachedTempDateFormatArray != null) {
for (int i = 0; i < CACHED_TDFS_SQL_D_T_TZ_OFFS; i++) {
TemplateDateFormat f = cachedTempDateFormatArray[i];
if (f != null && f.isTimeZoneBound()) {
cachedTempDateFormatArray[i] = null;
}
}
}
if (cachedTempDateFormatsByFmtStrArray != null) {
for (int i = 0; i < CACHED_TDFS_SQL_D_T_TZ_OFFS; i++) {
cachedTempDateFormatsByFmtStrArray[i] = null;
}
}
cachedSQLDateAndTimeTimeZoneSameAsNormal = null;
}
}
@Override
public void setSQLDateAndTimeTimeZone(TimeZone timeZone) {
TimeZone prevTimeZone = getSQLDateAndTimeTimeZone();
super.setSQLDateAndTimeTimeZone(timeZone);
if (!nullSafeEquals(timeZone, prevTimeZone)) {
if (cachedTempDateFormatArray != null) {
for (int i = CACHED_TDFS_SQL_D_T_TZ_OFFS; i < CACHED_TDFS_LENGTH; i++) {
TemplateDateFormat format = cachedTempDateFormatArray[i];
if (format != null && format.isTimeZoneBound()) {
cachedTempDateFormatArray[i] = null;
}
}
}
if (cachedTempDateFormatsByFmtStrArray != null) {
for (int i = CACHED_TDFS_SQL_D_T_TZ_OFFS; i < CACHED_TDFS_LENGTH; i++) {
cachedTempDateFormatsByFmtStrArray[i] = null;
}
}
cachedSQLDateAndTimeTimeZoneSameAsNormal = null;
}
}
// Replace with Objects.equals in Java 7
private static boolean nullSafeEquals(Object o1, Object o2) {
if (o1 == o2) return true;
if (o1 == null || o2 == null) return false;
return o1.equals(o2);
}
/**
* Tells if the same concrete time zone is used for SQL date-only and time-only values as for other
* date/time/date-time values.
*/
boolean isSQLDateAndTimeTimeZoneSameAsNormal() {
if (cachedSQLDateAndTimeTimeZoneSameAsNormal == null) {
cachedSQLDateAndTimeTimeZoneSameAsNormal = Boolean.valueOf(
getSQLDateAndTimeTimeZone() == null
|| getSQLDateAndTimeTimeZone().equals(getTimeZone()));
}
return cachedSQLDateAndTimeTimeZoneSameAsNormal.booleanValue();
}
@Override
public void setURLEscapingCharset(String urlEscapingCharset) {
cachedURLEscapingCharsetSet = false;
super.setURLEscapingCharset(urlEscapingCharset);
}
/*
* Note that altough it's not allowed to set this setting with the <tt>setting</tt> directive, it still must be
* allowed to set it from Java code while the template executes, since some frameworks allow templates to actually
* change the output encoding on-the-fly.
*/
@Override
public void setOutputEncoding(String outputEncoding) {
cachedURLEscapingCharsetSet = false;
super.setOutputEncoding(outputEncoding);
}
/**
* Returns the name of the charset that should be used for URL encoding. This will be <code>null</code> if the
* information is not available. The function caches the return value, so it's quick to call it repeatedly.
*/
String getEffectiveURLEscapingCharset() {
if (!cachedURLEscapingCharsetSet) {
cachedURLEscapingCharset = getURLEscapingCharset();
if (cachedURLEscapingCharset == null) {
cachedURLEscapingCharset = getOutputEncoding();
}
cachedURLEscapingCharsetSet = true;
}
return cachedURLEscapingCharset;
}
Collator getCollator() {
if (cachedCollator == null) {
cachedCollator = Collator.getInstance(getLocale());
}
return cachedCollator;
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "==" operator.
*
* @since 2.3.20
*/
public boolean applyEqualsOperator(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compare(leftValue, EvalUtil.CMP_OP_EQUALS, rightValue, this);
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "==" operator, except that if the two types
* are incompatible, they are treated as non-equal instead of throwing an exception. Comparing dates of different
* types (date-only VS time-only VS date-time) will still throw an exception, however.
*
* @since 2.3.20
*/
public boolean applyEqualsOperatorLenient(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compareLenient(leftValue, EvalUtil.CMP_OP_EQUALS, rightValue, this);
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "&lt;" operator.
*
* @since 2.3.20
*/
public boolean applyLessThanOperator(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compare(leftValue, EvalUtil.CMP_OP_LESS_THAN, rightValue, this);
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "&lt;" operator.
*
* @since 2.3.20
*/
public boolean applyLessThanOrEqualsOperator(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compare(leftValue, EvalUtil.CMP_OP_LESS_THAN_EQUALS, rightValue, this);
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "&gt;" operator.
*
* @since 2.3.20
*/
public boolean applyGreaterThanOperator(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compare(leftValue, EvalUtil.CMP_OP_GREATER_THAN, rightValue, this);
}
/**
* Compares two {@link TemplateModel}-s according the rules of the FTL "&gt;=" operator.
*
* @since 2.3.20
*/
public boolean applyWithGreaterThanOrEqualsOperator(TemplateModel leftValue, TemplateModel rightValue)
throws TemplateException {
return EvalUtil.compare(leftValue, EvalUtil.CMP_OP_GREATER_THAN_EQUALS, rightValue, this);
}
public void setOut(Writer out) {
this.out = out;
}
public Writer getOut() {
return out;
}
@Override
public void setNumberFormat(String formatName) {
super.setNumberFormat(formatName);
cachedTemplateNumberFormat = null;
}
/**
* Format number with the default number format.
*
* @param exp
* The blamed expression if an error occurs; it's only needed for better error messages
*/
String formatNumberToPlainText(TemplateNumberModel number, Expression exp, boolean useTempModelExc)
throws TemplateException {
return formatNumberToPlainText(number, getTemplateNumberFormat(exp, useTempModelExc), exp, useTempModelExc);
}
/**
* Format number with the number format specified as the parameter, with the current locale.
*
* @param exp
* The blamed expression if an error occurs; it's only needed for better error messages
*/
String formatNumberToPlainText(
TemplateNumberModel number, TemplateNumberFormat format, Expression exp,
boolean useTempModelExc)
throws TemplateException {
try {
return EvalUtil.assertFormatResultNotNull(format.formatToPlainText(number));
} catch (TemplateValueFormatException e) {
throw MessageUtil.newCantFormatNumberException(format, exp, e, useTempModelExc);
}
}
/**
* Format number with the number format specified as the parameter, with the current locale.
*
* @param exp
* The blamed expression if an error occurs; it's only needed for better error messages
*/
String formatNumberToPlainText(Number number, BackwardCompatibleTemplateNumberFormat format, Expression exp)
throws TemplateModelException, _MiscTemplateException {
try {
return format.format(number);
} catch (UnformattableValueException e) {
throw new _MiscTemplateException(exp, e, this,
"Failed to format number with ", new _DelayedJQuote(format.getDescription()), ": ",
e.getMessage());
}
}
/**
* Returns the current number format ({@link #getNumberFormat()}) as {@link TemplateNumberFormat}.
*
* <p>
* Performance notes: The result is stored for reuse, so calling this method frequently is usually not a problem.
* However, at least as of this writing (2.3.24), changing the current locale {@link #setLocale(Locale)} or changing
* the current number format ({@link #setNumberFormat(String)}) will drop the stored value, so it will have to be
* recalculated.
*
* @since 2.3.24
*/
public TemplateNumberFormat getTemplateNumberFormat() throws TemplateValueFormatException {
TemplateNumberFormat format = cachedTemplateNumberFormat;
if (format == null) {
format = getTemplateNumberFormat(getNumberFormat(), false);
cachedTemplateNumberFormat = format;
}
return format;
}
/**
* Returns the number format as {@link TemplateNumberFormat} for the given format string and the current locale.
* (The current locale is the locale returned by {@link #getLocale()}.) Note that the result will be cached in the
* {@link Environment} instance (though at least in 2.3.24 the cache will be flushed if the current locale of the
* {@link Environment} is changed).
*
* @param formatString
* A string that you could also use as the value of the {@code numberFormat} configuration setting. Can't
* be {@code null}.
*
* @since 2.3.24
*/
public TemplateNumberFormat getTemplateNumberFormat(String formatString) throws TemplateValueFormatException {
return getTemplateNumberFormat(formatString, true);
}
/**
* Returns the number format as {@link TemplateNumberFormat}, for the given format string and locale. To get a
* number format for the current locale, use {@link #getTemplateNumberFormat(String)} instead.
*
* <p>
* Note on performance (which was true at least for 2.3.24): Unless the locale happens to be equal to the current
* locale, the {@link Environment}-level format cache can't be used, so the format string has to be parsed and the
* matching factory has to be get an invoked, which is much more expensive than getting the format from the cache.
* Thus the returned format should be stored by the caller for later reuse (but only within the current thread and
* in relation to the current {@link Environment}), if it will be needed frequently.
*
* @param formatString
* A string that you could also use as the value of the {@code numberFormat} configuration setting.
* @param locale
* The locale of the number format; not {@code null}.
*
* @since 2.3.24
*/
public TemplateNumberFormat getTemplateNumberFormat(String formatString, Locale locale)
throws TemplateValueFormatException {
if (locale.equals(getLocale())) {
getTemplateNumberFormat(formatString);
}
return getTemplateNumberFormatWithoutCache(formatString, locale);
}
/**
* Convenience wrapper around {@link #getTemplateNumberFormat()} to be called during expression evaluation.
*/
TemplateNumberFormat getTemplateNumberFormat(Expression exp, boolean useTempModelExc) throws TemplateException {
TemplateNumberFormat format;
try {
format = getTemplateNumberFormat();
} catch (TemplateValueFormatException e) {
_ErrorDescriptionBuilder desc = new _ErrorDescriptionBuilder(
"Failed to get number format object for the current number format string, ",
new _DelayedJQuote(getNumberFormat()), ": ", e.getMessage())
.blame(exp);
throw useTempModelExc
? new _TemplateModelException(e, this, desc) : new _MiscTemplateException(e, this, desc);
}
return format;
}
/**
* Convenience wrapper around {@link #getTemplateNumberFormat(String)} to be called during expression evaluation.
*
* @param exp
* The blamed expression if an error occurs; it's only needed for better error messages
*/
TemplateNumberFormat getTemplateNumberFormat(String formatString, Expression exp, boolean useTempModelExc)
throws TemplateException {
TemplateNumberFormat format;
try {
format = getTemplateNumberFormat(formatString);
} catch (TemplateValueFormatException e) {
_ErrorDescriptionBuilder desc = new _ErrorDescriptionBuilder(
"Failed to get number format object for the ", new _DelayedJQuote(formatString),
" number format string: ", e.getMessage())
.blame(exp);
throw useTempModelExc
? new _TemplateModelException(e, this, desc) : new _MiscTemplateException(e, this, desc);
}
return format;
}
/**
* Gets the {@link TemplateNumberFormat} <em>for the current locale</em>.
*
* @param formatString
* Not {@code null}
* @param cacheResult
* If the results should stored in the {@link Environment}-level cache. It will still try to get the
* result from the cache regardless of this parameter.
*/
private TemplateNumberFormat getTemplateNumberFormat(String formatString, boolean cacheResult)
throws TemplateValueFormatException {
if (cachedTemplateNumberFormats == null) {
if (cacheResult) {
cachedTemplateNumberFormats = new HashMap<String, TemplateNumberFormat>();
}
} else {
TemplateNumberFormat format = cachedTemplateNumberFormats.get(formatString);
if (format != null) {
return format;
}
}
TemplateNumberFormat format = getTemplateNumberFormatWithoutCache(formatString, getLocale());
if (cacheResult) {
cachedTemplateNumberFormats.put(formatString, format);
}
return format;
}
/**
* Returns the {@link TemplateNumberFormat} for the given parameters without using the {@link Environment}-level
* cache. Of course, the {@link TemplateNumberFormatFactory} involved might still uses its own cache.
*
* @param formatString
* Not {@code null}
* @param locale
* Not {@code null}
*/
private TemplateNumberFormat getTemplateNumberFormatWithoutCache(String formatString, Locale locale)
throws TemplateValueFormatException {
int formatStringLen = formatString.length();
if (formatStringLen > 1
&& formatString.charAt(0) == '@'
&& (isIcI2324OrLater() || hasCustomFormats())
&& Character.isLetter(formatString.charAt(1))) {
final String name;
final String params;
{
int endIdx;
findParamsStart: for (endIdx = 1; endIdx < formatStringLen; endIdx++) {
char c = formatString.charAt(endIdx);
if (c == ' ' || c == '_') {
break findParamsStart;
}
}
name = formatString.substring(1, endIdx);
params = endIdx < formatStringLen ? formatString.substring(endIdx + 1) : "";
}
TemplateNumberFormatFactory formatFactory = getCustomNumberFormat(name);
if (formatFactory == null) {
throw new UndefinedCustomFormatException(
"No custom number format was defined with name " + StringUtil.jQuote(name));
}
return formatFactory.get(params, locale, this);
} else {
return JavaTemplateNumberFormatFactory.INSTANCE.get(formatString, locale, this);
}
}
/**
* Returns the {@link NumberFormat} used for the <tt>c</tt> built-in. This is always US English
* <code>"0.################"</code>, without grouping and without superfluous decimal separator.
*/
public NumberFormat getCNumberFormat() {
// It can't be cached in a static field, because DecimalFormat-s aren't
// thread-safe.
if (cNumberFormat == null) {
cNumberFormat = (DecimalFormat) C_NUMBER_FORMAT.clone();
}
return cNumberFormat;
}
@Override
public void setTimeFormat(String timeFormat) {
String prevTimeFormat = getTimeFormat();
super.setTimeFormat(timeFormat);
if (!timeFormat.equals(prevTimeFormat)) {
if (cachedTempDateFormatArray != null) {
for (int i = 0; i < CACHED_TDFS_LENGTH; i += CACHED_TDFS_ZONELESS_INPUT_OFFS) {
cachedTempDateFormatArray[i + TemplateDateModel.TIME] = null;
}
}
}
}
@Override
public void setDateFormat(String dateFormat) {
String prevDateFormat = getDateFormat();
super.setDateFormat(dateFormat);
if (!dateFormat.equals(prevDateFormat)) {
if (cachedTempDateFormatArray != null) {
for (int i = 0; i < CACHED_TDFS_LENGTH; i += CACHED_TDFS_ZONELESS_INPUT_OFFS) {
cachedTempDateFormatArray[i + TemplateDateModel.DATE] = null;
}
}
}
}
@Override
public void setDateTimeFormat(String dateTimeFormat) {
String prevDateTimeFormat = getDateTimeFormat();
super.setDateTimeFormat(dateTimeFormat);
if (!dateTimeFormat.equals(prevDateTimeFormat)) {
if (cachedTempDateFormatArray != null) {
for (int i = 0; i < CACHED_TDFS_LENGTH; i += CACHED_TDFS_ZONELESS_INPUT_OFFS) {
cachedTempDateFormatArray[i + TemplateDateModel.DATETIME] = null;
}
}
}
}
public Configuration getConfiguration() {
return configuration;
}
TemplateModel getLastReturnValue() {
return lastReturnValue;
}
void setLastReturnValue(TemplateModel lastReturnValue) {
this.lastReturnValue = lastReturnValue;
}
void clearLastReturnValue() {
this.lastReturnValue = null;
}
/**
* @param tdmSourceExpr
* The blamed expression if an error occurs; only used for error messages.
*/
String formatDateToPlainText(TemplateDateModel tdm, Expression tdmSourceExpr,
boolean useTempModelExc) throws TemplateException {
TemplateDateFormat format = getTemplateDateFormat(tdm, tdmSourceExpr, useTempModelExc);
try {
return EvalUtil.assertFormatResultNotNull(format.formatToPlainText(tdm));
} catch (TemplateValueFormatException e) {
throw MessageUtil.newCantFormatDateException(format, tdmSourceExpr, e, useTempModelExc);
}
}
/**
* @param blamedDateSourceExp
* The blamed expression if an error occurs; only used for error messages.
* @param blamedFormatterExp
* The blamed expression if an error occurs; only used for error messages.
*/
String formatDateToPlainText(TemplateDateModel tdm, String formatString,
Expression blamedDateSourceExp, Expression blamedFormatterExp,
boolean useTempModelExc) throws TemplateException {
Date date = EvalUtil.modelToDate(tdm, blamedDateSourceExp);
TemplateDateFormat format = getTemplateDateFormat(
formatString, tdm.getDateType(), date.getClass(),
blamedDateSourceExp, blamedFormatterExp,
useTempModelExc);
try {
return EvalUtil.assertFormatResultNotNull(format.formatToPlainText(tdm));
} catch (TemplateValueFormatException e) {
throw MessageUtil.newCantFormatDateException(format, blamedDateSourceExp, e, useTempModelExc);
}
}
/**
* Gets a {@link TemplateDateFormat} using the date/time/datetime format settings and the current locale and time
* zone. (The current locale is the locale returned by {@link #getLocale()}. The current time zone is
* {@link #getTimeZone()} or {@link #getSQLDateAndTimeTimeZone()}).
*
* @param dateType
* The FTL date type; see the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
* @param dateClass
* The exact {@link Date} class, like {@link java.sql.Date} or {@link java.sql.Time}; this can influences
* time zone selection. See also: {@link #setSQLDateAndTimeTimeZone(TimeZone)}
*/
public TemplateDateFormat getTemplateDateFormat(int dateType, Class<? extends Date> dateClass)
throws TemplateValueFormatException {
boolean isSQLDateOrTime = isSQLDateOrTimeClass(dateClass);
return getTemplateDateFormat(dateType, shouldUseSQLDTTimeZone(isSQLDateOrTime), isSQLDateOrTime);
}
/**
* Gets a {@link TemplateDateFormat} for the specified format string and the current locale and time zone. (The
* current locale is the locale returned by {@link #getLocale()}. The current time zone is {@link #getTimeZone()} or
* {@link #getSQLDateAndTimeTimeZone()}).
*
* <p>
* Note on performance: The result will be cached in the {@link Environment} instance. However, at least in 2.3.24
* the cached entries that depend on the current locale or the current time zone or the current date/time/datetime
* format of the {@link Environment} will be lost when those settings are changed.
*
* @param formatString
* Like {@code "iso m"} or {@code "dd.MM.yyyy HH:mm"} or {@code "@somethingCustom"} or
* {@code "@somethingCustom params"}
*
* @since 2.3.24
*/
public TemplateDateFormat getTemplateDateFormat(
String formatString, int dateType, Class<? extends Date> dateClass)
throws TemplateValueFormatException {
boolean isSQLDateOrTime = isSQLDateOrTimeClass(dateClass);
return getTemplateDateFormat(
formatString, dateType,
shouldUseSQLDTTimeZone(isSQLDateOrTime), isSQLDateOrTime, true);
}
/**
* Like {@link #getTemplateDateFormat(String, int, Class)}, but allows you to use a different locale than the
* current one. If you want to use the current locale, use {@link #getTemplateDateFormat(String, int, Class)}
* instead.
*
* <p>
* Performance notes regarding the locale and time zone parameters of
* {@link #getTemplateDateFormat(String, int, Locale, TimeZone, boolean)} apply.
*
* @param locale
* Can't be {@code null}; See the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
*
* @see #getTemplateDateFormat(String, int, Class)
*
* @since 2.4
*/
public TemplateDateFormat getTemplateDateFormat(
String formatString,
int dateType, Class<? extends Date> dateClass,
Locale locale)
throws TemplateValueFormatException {
boolean isSQLDateOrTime = isSQLDateOrTimeClass(dateClass);
boolean useSQLDTTZ = shouldUseSQLDTTimeZone(isSQLDateOrTime);
return getTemplateDateFormat(
formatString,
dateType, locale, useSQLDTTZ ? getSQLDateAndTimeTimeZone() : getTimeZone(), isSQLDateOrTime);
}
/**
* Like {@link #getTemplateDateFormat(String, int, Class)}, but allows you to use a different locale and time zone
* than the current one. If you want to use the current locale and time zone, use
* {@link #getTemplateDateFormat(String, int, Class)} instead.
*
* <p>
* Performance notes regarding the locale and time zone parameters of
* {@link #getTemplateDateFormat(String, int, Locale, TimeZone, boolean)} apply.
*
* @param timeZone
* The {@link TimeZone} used if {@code dateClass} is not an SQL date-only or time-only type. Can't be
* {@code null}.
* @param sqlDateAndTimeTimeZone
* The {@link TimeZone} used if {@code dateClass} is an SQL date-only or time-only type. Can't be
* {@code null}.
*
* @see #getTemplateDateFormat(String, int, Class)
*
* @since 2.4
*/
public TemplateDateFormat getTemplateDateFormat(
String formatString,
int dateType, Class<? extends Date> dateClass,
Locale locale, TimeZone timeZone, TimeZone sqlDateAndTimeTimeZone)
throws TemplateValueFormatException {
boolean isSQLDateOrTime = isSQLDateOrTimeClass(dateClass);
boolean useSQLDTTZ = shouldUseSQLDTTimeZone(isSQLDateOrTime);
return getTemplateDateFormat(
formatString,
dateType, locale, useSQLDTTZ ? sqlDateAndTimeTimeZone : timeZone, isSQLDateOrTime);
}
/**
* Gets a {@link TemplateDateFormat} for the specified parameters. This is mostly meant to be used by
* {@link TemplateDateFormatFactory} implementations to delegate to a format based on a specific format string. It
* works well for that, as its parameters are the same low level values as the parameters of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}. For other tasks
* consider the other overloads of this method.
*
* <p>
* Note on performance (which was true at least for 2.3.24): Unless the locale happens to be equal to the current
* locale and the time zone with one of the current time zones ({@link #getTimeZone()} or
* {@link #getSQLDateAndTimeTimeZone()}), the {@link Environment}-level format cache can't be used, so the format
* string has to be parsed and the matching factory has to be get an invoked, which is much more expensive than
* getting the format from the cache. Thus the returned format should be stored by the caller for later reuse (but
* only within the current thread and in relation to the current {@link Environment}), if it will be needed
* frequently.
*
* @param formatString
* Like {@code "iso m"} or {@code "dd.MM.yyyy HH:mm"} or {@code "@somethingCustom"} or
* {@code "@somethingCustom params"}
* @param dateType
* The FTL date type; see the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
* @param timeZone
* Not {@code null}; See the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
* @param locale
* Not {@code null}; See the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
* @param zonelessInput
* See the similar parameter of
* {@link TemplateDateFormatFactory#get(String, int, Locale, TimeZone, boolean, Environment)}
*
* @since 2.3.24
*/
public TemplateDateFormat getTemplateDateFormat(
String formatString,
int dateType, Locale locale, TimeZone timeZone, boolean zonelessInput)
throws TemplateValueFormatException {
Locale currentLocale = getLocale();
if (locale.equals(currentLocale)) {
int equalCurrentTZ;
TimeZone currentTimeZone = getTimeZone();
if (timeZone.equals(currentTimeZone)) {
equalCurrentTZ = 1;
} else {
TimeZone currentSQLDTTimeZone = getSQLDateAndTimeTimeZone();
if (timeZone.equals(currentSQLDTTimeZone)) {
equalCurrentTZ = 2;
} else {
equalCurrentTZ = 0;
}
}
if (equalCurrentTZ != 0) {
return getTemplateDateFormat(formatString, dateType, equalCurrentTZ == 2, zonelessInput, true);
}
// Falls through
}
return getTemplateDateFormatWithoutCache(formatString, dateType, locale, timeZone, zonelessInput);
}
TemplateDateFormat getTemplateDateFormat(TemplateDateModel tdm, Expression tdmSourceExpr, boolean useTempModelExc)
throws TemplateModelException, TemplateException {
Date date = EvalUtil.modelToDate(tdm, tdmSourceExpr);
TemplateDateFormat format = getTemplateDateFormat(
tdm.getDateType(), date.getClass(), tdmSourceExpr,
useTempModelExc);
return format;
}
/**
* Same as {@link #getTemplateDateFormat(int, Class)}, but translates the exceptions to {@link TemplateException}-s.
*/
TemplateDateFormat getTemplateDateFormat(
int dateType, Class<? extends Date> dateClass, Expression blamedDateSourceExp, boolean useTempModelExc)
throws TemplateException {
try {
return getTemplateDateFormat(dateType, dateClass);
} catch (UnknownDateTypeFormattingUnsupportedException e) {
throw MessageUtil.newCantFormatUnknownTypeDateException(blamedDateSourceExp, e);
} catch (TemplateValueFormatException e) {
String settingName;
String settingValue;
switch (dateType) {
case TemplateDateModel.TIME:
settingName = Configurable.TIME_FORMAT_KEY;
settingValue = getTimeFormat();
break;
case TemplateDateModel.DATE:
settingName = Configurable.DATE_FORMAT_KEY;
settingValue = getDateFormat();
break;
case TemplateDateModel.DATETIME:
settingName = Configurable.DATETIME_FORMAT_KEY;
settingValue = getDateTimeFormat();
break;
default:
settingName = "???";
settingValue = "???";
}
_ErrorDescriptionBuilder desc = new _ErrorDescriptionBuilder(
"The value of the \"", settingName,
"\" FreeMarker configuration setting is a malformed date/time/datetime format string: ",
new _DelayedJQuote(settingValue), ". Reason given: ",
e.getMessage());
throw useTempModelExc ? new _TemplateModelException(e, desc) : new _MiscTemplateException(e, desc);
}
}
/**
* Same as {@link #getTemplateDateFormat(String, int, Class)}, but translates the exceptions to
* {@link TemplateException}-s.
*/
TemplateDateFormat getTemplateDateFormat(
String formatString, int dateType, Class<? extends Date> dateClass,
Expression blamedDateSourceExp, Expression blamedFormatterExp,
boolean useTempModelExc)
throws TemplateException {
try {
return getTemplateDateFormat(formatString, dateType, dateClass);
} catch (UnknownDateTypeFormattingUnsupportedException e) {
throw MessageUtil.newCantFormatUnknownTypeDateException(blamedDateSourceExp, e);
} catch (TemplateValueFormatException e) {
_ErrorDescriptionBuilder desc = new _ErrorDescriptionBuilder(
"Can't create date/time/datetime format based on format string ",
new _DelayedJQuote(formatString), ". Reason given: ",
e.getMessage())
.blame(blamedFormatterExp);
throw useTempModelExc ? new _TemplateModelException(e, desc) : new _MiscTemplateException(e, desc);
}
}
/**
* Used to get the {@link TemplateDateFormat} according the date/time/datetime format settings, for the current
* locale and time zone. See {@link #getTemplateDateFormat(String, int, Locale, TimeZone, boolean)} for the meaning
* of some of the parameters.
*/
private TemplateDateFormat getTemplateDateFormat(int dateType, boolean useSQLDTTZ, boolean zonelessInput)
throws TemplateValueFormatException {
if (dateType == TemplateDateModel.UNKNOWN) {
throw new UnknownDateTypeFormattingUnsupportedException();
}
int cacheIdx = getTemplateDateFormatCacheArrayIndex(dateType, zonelessInput, useSQLDTTZ);
TemplateDateFormat[] cachedTemplateDateFormats = this.cachedTempDateFormatArray;
if (cachedTemplateDateFormats == null) {
cachedTemplateDateFormats = new TemplateDateFormat[CACHED_TDFS_LENGTH];
this.cachedTempDateFormatArray = cachedTemplateDateFormats;
}
TemplateDateFormat format = cachedTemplateDateFormats[cacheIdx];
if (format == null) {
final String formatString;
switch (dateType) {
case TemplateDateModel.TIME:
formatString = getTimeFormat();
break;
case TemplateDateModel.DATE:
formatString = getDateFormat();
break;
case TemplateDateModel.DATETIME:
formatString = getDateTimeFormat();
break;
default:
throw new IllegalArgumentException("Invalid date type enum: " + Integer.valueOf(dateType));
}
format = getTemplateDateFormat(formatString, dateType, useSQLDTTZ, zonelessInput, false);
cachedTemplateDateFormats[cacheIdx] = format;
}
return format;
}
/**
* Used to get the {@link TemplateDateFormat} for the specified parameters, using the {@link Environment}-level
* cache. As the {@link Environment}-level cache currently only stores formats for the current locale and time zone,
* there's no parameter to specify those.
*
* @param cacheResult
* If the results should stored in the {@link Environment}-level cache. It will still try to get the
* result from the cache regardless of this parameter.
*/
private TemplateDateFormat getTemplateDateFormat(
String formatString, int dateType, boolean useSQLDTTimeZone, boolean zonelessInput,
boolean cacheResult)
throws TemplateValueFormatException {
HashMap<String, TemplateDateFormat> cachedFormatsByFormatString;
readFromCache: do {
HashMap<String, TemplateDateFormat>[] cachedTempDateFormatsByFmtStrArray = this.cachedTempDateFormatsByFmtStrArray;
if (cachedTempDateFormatsByFmtStrArray == null) {
if (cacheResult) {
cachedTempDateFormatsByFmtStrArray = new HashMap[CACHED_TDFS_LENGTH];
this.cachedTempDateFormatsByFmtStrArray = cachedTempDateFormatsByFmtStrArray;
} else {
cachedFormatsByFormatString = null;
break readFromCache;
}
}
TemplateDateFormat format;
{
int cacheArrIdx = getTemplateDateFormatCacheArrayIndex(dateType, zonelessInput, useSQLDTTimeZone);
cachedFormatsByFormatString = cachedTempDateFormatsByFmtStrArray[cacheArrIdx];
if (cachedFormatsByFormatString == null) {
if (cacheResult) {
cachedFormatsByFormatString = new HashMap<String, TemplateDateFormat>(4);
cachedTempDateFormatsByFmtStrArray[cacheArrIdx] = cachedFormatsByFormatString;
format = null;
} else {
break readFromCache;
}
} else {
format = cachedFormatsByFormatString.get(formatString);
}
}
if (format != null) {
return format;
}
// Cache miss; falls through
} while (false);
TemplateDateFormat format = getTemplateDateFormatWithoutCache(
formatString,
dateType, getLocale(), useSQLDTTimeZone ? getSQLDateAndTimeTimeZone() : getTimeZone(),
zonelessInput);
if (cacheResult) {
// We know here that cachedFormatsByFormatString != null
cachedFormatsByFormatString.put(formatString, format);
}
return format;
}
/**
* Returns the {@link TemplateDateFormat} for the given parameters without using the {@link Environment}-level
* cache. Of course, the {@link TemplateDateFormatFactory} involved might still uses its own cache, which can be
* global (class-loader-level) or {@link Environment}-level.
*
* @param formatString
* See the similar parameter of {@link TemplateDateFormatFactory#get}
* @param dateType
* See the similar parameter of {@link TemplateDateFormatFactory#get}
* @param zonelessInput
* See the similar parameter of {@link TemplateDateFormatFactory#get}
*/
private TemplateDateFormat getTemplateDateFormatWithoutCache(
String formatString, int dateType, Locale locale, TimeZone timeZone, boolean zonelessInput)
throws TemplateValueFormatException {
final int formatStringLen = formatString.length();
final String formatParams;
TemplateDateFormatFactory formatFactory;
char firstChar = formatStringLen != 0 ? formatString.charAt(0) : 0;
// As of Java 8, 'x' and 'i' (lower case) are illegal date format letters, so this is backward-compatible.
if (firstChar == 'x'
&& formatStringLen > 1
&& formatString.charAt(1) == 's') {
formatFactory = XSTemplateDateFormatFactory.INSTANCE;
formatParams = formatString; // for speed, we don't remove the prefix
} else if (firstChar == 'i'
&& formatStringLen > 2
&& formatString.charAt(1) == 's'
&& formatString.charAt(2) == 'o') {
formatFactory = ISOTemplateDateFormatFactory.INSTANCE;
formatParams = formatString; // for speed, we don't remove the prefix
} else if (firstChar == '@'
&& formatStringLen > 1
&& (isIcI2324OrLater() || hasCustomFormats())
&& Character.isLetter(formatString.charAt(1))) {
final String name;
{
int endIdx;
findParamsStart: for (endIdx = 1; endIdx < formatStringLen; endIdx++) {
char c = formatString.charAt(endIdx);
if (c == ' ' || c == '_') {
break findParamsStart;
}
}
name = formatString.substring(1, endIdx);
formatParams = endIdx < formatStringLen ? formatString.substring(endIdx + 1) : "";
}
formatFactory = getCustomDateFormat(name);
if (formatFactory == null) {
throw new UndefinedCustomFormatException(
"No custom date format was defined with name " + StringUtil.jQuote(name));
}
} else {
formatParams = formatString;
formatFactory = JavaTemplateDateFormatFactory.INSTANCE;
}
return formatFactory.get(formatParams, dateType, locale, timeZone,
zonelessInput, this);
}
boolean shouldUseSQLDTTZ(Class dateClass) {
// Attention! If you update this method, update all overloads of it!
return dateClass != Date.class // This pre-condition is only for speed
&& !isSQLDateAndTimeTimeZoneSameAsNormal()
&& isSQLDateOrTimeClass(dateClass);
}
private boolean shouldUseSQLDTTimeZone(boolean sqlDateOrTime) {
// Attention! If you update this method, update all overloads of it!
return sqlDateOrTime && !isSQLDateAndTimeTimeZoneSameAsNormal();
}
/**
* Tells if the given class is or is subclass of {@link java.sql.Date} or {@link java.sql.Time}.
*/
private static boolean isSQLDateOrTimeClass(Class dateClass) {
// We do shortcuts for the most common cases.
return dateClass != java.util.Date.class
&& (dateClass == java.sql.Date.class || dateClass == Time.class
|| (dateClass != Timestamp.class
&& (java.sql.Date.class.isAssignableFrom(dateClass)
|| Time.class.isAssignableFrom(dateClass))));
}
private int getTemplateDateFormatCacheArrayIndex(int dateType, boolean zonelessInput, boolean sqlDTTZ) {
return dateType
+ (zonelessInput ? CACHED_TDFS_ZONELESS_INPUT_OFFS : 0)
+ (sqlDTTZ ? CACHED_TDFS_SQL_D_T_TZ_OFFS : 0);
}
/**
* Returns the {@link DateToISO8601CalendarFactory} used by the the "iso_" built-ins. Be careful when using this; it
* should only by used with
* {@link DateUtil#dateToISO8601String(Date, boolean, boolean, boolean, int, TimeZone, DateToISO8601CalendarFactory)}
* and {@link DateUtil#dateToXSString(Date, boolean, boolean, boolean, int, TimeZone, DateToISO8601CalendarFactory)}
* .
*/
DateToISO8601CalendarFactory getISOBuiltInCalendarFactory() {
if (isoBuiltInCalendarFactory == null) {
isoBuiltInCalendarFactory = new DateUtil.TrivialDateToISO8601CalendarFactory();
}
return isoBuiltInCalendarFactory;
}
TemplateTransformModel getTransform(Expression exp) throws TemplateException {
TemplateTransformModel ttm = null;
TemplateModel tm = exp.eval(this);
if (tm instanceof TemplateTransformModel) {
ttm = (TemplateTransformModel) tm;
} else if (exp instanceof Identifier) {
tm = configuration.getSharedVariable(exp.toString());
if (tm instanceof TemplateTransformModel) {
ttm = (TemplateTransformModel) tm;
}
}
return ttm;
}
/**
* Returns the loop or macro local variable corresponding to this variable name. Possibly null. (Note that the
* misnomer is kept for backward compatibility: loop variables are not local variables according to our
* terminology.)
*/
public TemplateModel getLocalVariable(String name) throws TemplateModelException {
if (localContextStack != null) {
for (int i = localContextStack.size() - 1; i >= 0; i--) {
LocalContext lc = localContextStack.get(i);
TemplateModel tm = lc.getLocalVariable(name);
if (tm != null) {
return tm;
}
}
}
return currentMacroContext == null ? null : currentMacroContext.getLocalVariable(name);
}
/**
* Returns the variable that is visible in this context, or {@code null} if the variable is not found. This is the
* correspondent to an FTL top-level variable reading expression. That is, it tries to find the the variable in this
* order:
* <ol>
* <li>An loop variable (if we're in a loop or user defined directive body) such as foo_has_next
* <li>A local variable (if we're in a macro)
* <li>A variable defined in the current namespace (say, via &lt;#assign ...&gt;)
* <li>A variable defined globally (say, via &lt;#global ....&gt;)
* <li>Variable in the data model:
* <ol>
* <li>A variable in the root hash that was exposed to this rendering environment in the Template.process(...) call
* <li>A shared variable set in the configuration via a call to Configuration.setSharedVariable(...)
* </ol>
* </li>
* </ol>
*/
public TemplateModel getVariable(String name) throws TemplateModelException {
TemplateModel result = getLocalVariable(name);
if (result == null) {
result = currentNamespace.get(name);
}
if (result == null) {
result = getGlobalVariable(name);
}
return result;
}
/**
* Returns the globally visible variable of the given name (or null). This is correspondent to FTL
* <code>.globals.<i>name</i></code>. This will first look at variables that were assigned globally via: &lt;#global
* ...&gt; and then at the data model exposed to the template.
*/
public TemplateModel getGlobalVariable(String name) throws TemplateModelException {
TemplateModel result = globalNamespace.get(name);
if (result == null) {
result = rootDataModel.get(name);
}
if (result == null) {
result = configuration.getSharedVariable(name);
}
return result;
}
/**
* Sets a variable that is visible globally. This is correspondent to FTL
* <code>&lt;#global <i>name</i>=<i>model</i>&gt;</code>. This can be considered a convenient shorthand for:
* getGlobalNamespace().put(name, model)
*/
public void setGlobalVariable(String name, TemplateModel model) {
globalNamespace.put(name, model);
}
/**
* Sets a variable in the current namespace. This is correspondent to FTL
* <code>&lt;#assign <i>name</i>=<i>model</i>&gt;</code>. This can be considered a convenient shorthand for:
* getCurrentNamespace().put(name, model)
*/
public void setVariable(String name, TemplateModel model) {
currentNamespace.put(name, model);
}
/**
* Sets a local variable (one effective only during a macro invocation). This is correspondent to FTL
* <code>&lt;#local <i>name</i>=<i>model</i>&gt;</code>.
*
* @param name
* the identifier of the variable
* @param model
* the value of the variable.
* @throws IllegalStateException
* if the environment is not executing a macro body.
*/
public void setLocalVariable(String name, TemplateModel model) {
if (currentMacroContext == null) {
throw new IllegalStateException("Not executing macro body");
}
currentMacroContext.setLocalVar(name, model);
}
/**
* Returns a set of variable names that are known at the time of call. This includes names of all shared variables
* in the {@link Configuration}, names of all global variables that were assigned during the template processing,
* names of all variables in the current name-space, names of all local variables and loop variables. If the passed
* root data model implements the {@link TemplateHashModelEx} interface, then all names it retrieves through a call
* to {@link TemplateHashModelEx#keys()} method are returned as well. The method returns a new Set object on each
* call that is completely disconnected from the Environment. That is, modifying the set will have no effect on the
* Environment object.
*/
public Set getKnownVariableNames() throws TemplateModelException {
// shared vars.
Set set = configuration.getSharedVariableNames();
// root hash
if (rootDataModel instanceof TemplateHashModelEx) {
TemplateModelIterator rootNames = ((TemplateHashModelEx) rootDataModel).keys().iterator();
while (rootNames.hasNext()) {
set.add(((TemplateScalarModel) rootNames.next()).getAsString());
}
}
// globals
for (TemplateModelIterator tmi = globalNamespace.keys().iterator(); tmi.hasNext();) {
set.add(((TemplateScalarModel) tmi.next()).getAsString());
}
// current name-space
for (TemplateModelIterator tmi = currentNamespace.keys().iterator(); tmi.hasNext();) {
set.add(((TemplateScalarModel) tmi.next()).getAsString());
}
// locals and loop vars
if (currentMacroContext != null) {
set.addAll(currentMacroContext.getLocalVariableNames());
}
if (localContextStack != null) {
for (int i = localContextStack.size() - 1; i >= 0; i--) {
LocalContext lc = localContextStack.get(i);
set.addAll(lc.getLocalVariableNames());
}
}
return set;
}
/**
* Prints the current FTL stack trace. Useful for debugging. {@link TemplateException}s incorporate this information
* in their stack traces.
*/
public void outputInstructionStack(PrintWriter pw) {
outputInstructionStack(getInstructionStackSnapshot(), false, pw);
pw.flush();
}
private static final int TERSE_MODE_INSTRUCTION_STACK_TRACE_LIMIT = 10;
/**
* Prints an FTL stack trace based on a stack trace snapshot.
*
* @param w
* If it's a {@link PrintWriter}, {@link PrintWriter#println()} will be used for line-breaks.
* @see #getInstructionStackSnapshot()
* @since 2.3.21
*/
static void outputInstructionStack(
TemplateElement[] instructionStackSnapshot, boolean terseMode, Writer w) {
final PrintWriter pw = (PrintWriter) (w instanceof PrintWriter ? w : null);
try {
if (instructionStackSnapshot != null) {
final int totalFrames = instructionStackSnapshot.length;
int framesToPrint = terseMode
? (totalFrames <= TERSE_MODE_INSTRUCTION_STACK_TRACE_LIMIT
? totalFrames
: TERSE_MODE_INSTRUCTION_STACK_TRACE_LIMIT - 1)
: totalFrames;
boolean hideNestringRelatedFrames = terseMode && framesToPrint < totalFrames;
int nestingRelatedFramesHidden = 0;
int trailingFramesHidden = 0;
int framesPrinted = 0;
for (int frameIdx = 0; frameIdx < totalFrames; frameIdx++) {
TemplateElement stackEl = instructionStackSnapshot[frameIdx];
final boolean nestingRelatedElement = (frameIdx > 0 && stackEl instanceof BodyInstruction)
|| (frameIdx > 1 && instructionStackSnapshot[frameIdx - 1] instanceof BodyInstruction);
if (framesPrinted < framesToPrint) {
if (!nestingRelatedElement || !hideNestringRelatedFrames) {
w.write(frameIdx == 0
? "\t- Failed at: "
: (nestingRelatedElement
? "\t~ Reached through: "
: "\t- Reached through: "));
w.write(instructionStackItemToString(stackEl));
if (pw != null) pw.println();
else
w.write('\n');
framesPrinted++;
} else {
nestingRelatedFramesHidden++;
}
} else {
trailingFramesHidden++;
}
}
boolean hadClosingNotes = false;
if (trailingFramesHidden > 0) {
w.write("\t... (Had ");
w.write(String.valueOf(trailingFramesHidden + nestingRelatedFramesHidden));
w.write(" more, hidden for tersenes)");
hadClosingNotes = true;
}
if (nestingRelatedFramesHidden > 0) {
if (hadClosingNotes) {
w.write(' ');
} else {
w.write('\t');
}
w.write("(Hidden " + nestingRelatedFramesHidden + " \"~\" lines for terseness)");
if (pw != null) pw.println();
else
w.write('\n');
hadClosingNotes = true;
}
if (hadClosingNotes) {
if (pw != null) pw.println();
else
w.write('\n');
}
} else {
w.write("(The stack was empty)");
if (pw != null) pw.println();
else
w.write('\n');
}
} catch (IOException e) {
LOG.error("Failed to print FTL stack trace", e);
}
}
/**
* Returns the snapshot of what would be printed as FTL stack trace.
*
* @since 2.3.20
*/
TemplateElement[] getInstructionStackSnapshot() {
int requiredLength = 0;
int ln = instructionStackSize;
for (int i = 0; i < ln; i++) {
TemplateElement stackEl = instructionStack[i];
if (i == ln - 1 || stackEl.isShownInStackTrace()) {
requiredLength++;
}
}
if (requiredLength == 0) return null;
TemplateElement[] result = new TemplateElement[requiredLength];
int dstIdx = requiredLength - 1;
for (int i = 0; i < ln; i++) {
TemplateElement stackEl = instructionStack[i];
if (i == ln - 1 || stackEl.isShownInStackTrace()) {
result[dstIdx--] = stackEl;
}
}
return result;
}
static String instructionStackItemToString(TemplateElement stackEl) {
StringBuilder sb = new StringBuilder();
appendInstructionStackItem(stackEl, sb);
return sb.toString();
}
static void appendInstructionStackItem(TemplateElement stackEl, StringBuilder sb) {
sb.append(MessageUtil.shorten(stackEl.getDescription(), 40));
sb.append(" [");
Macro enclosingMacro = getEnclosingMacro(stackEl);
if (enclosingMacro != null) {
sb.append(MessageUtil.formatLocationForEvaluationError(
enclosingMacro, stackEl.beginLine, stackEl.beginColumn));
} else {
sb.append(MessageUtil.formatLocationForEvaluationError(
stackEl.getTemplate(), stackEl.beginLine, stackEl.beginColumn));
}
sb.append("]");
}
static private Macro getEnclosingMacro(TemplateElement stackEl) {
while (stackEl != null) {
if (stackEl instanceof Macro) return (Macro) stackEl;
stackEl = stackEl.getParentElement();
}
return null;
}
private void pushLocalContext(LocalContext localContext) {
if (localContextStack == null) {
localContextStack = new LocalContextStack();
}
localContextStack.push(localContext);
}
LocalContextStack getLocalContextStack() {
return localContextStack;
}
/**
* Returns the name-space for the name if exists, or null.
*
* @param name
* the template path that you have used with the <code>import</code> directive or
* {@link #importLib(String, String)} call, in normalized form. That is, the path must be an absolute
* path, and it must not contain "/../" or "/./". The leading "/" is optional.
*/
public Namespace getNamespace(String name) {
if (name.startsWith("/")) name = name.substring(1);
if (loadedLibs != null) {
return (Namespace) loadedLibs.get(name);
} else {
return null;
}
}
/**
* Returns the main namespace. This corresponds to the FTL {@code .main} hash.
*/
public Namespace getMainNamespace() {
return mainNamespace;
}
/**
* Returns the current namespace. This corresponds to the FTL {@code .namespace} hash. Initially, the current name
* space is the main namespace, but when inside an {@code #import}-ed template, it will change to the namespace of
* that import. Note that {@code #include} doesn't affect the namespace, so if you are in an {@code #import}-ed
* template and then from there do an {@code #include}, the current namespace will remain the namespace of the
* {@code #import}.
*/
public Namespace getCurrentNamespace() {
return currentNamespace;
}
/**
* Returns the name-space that contains the globally visible non-data-model variables (usually created with
* {@code &lt;#global ...&gt;}).
*/
public Namespace getGlobalNamespace() {
return globalNamespace;
}
/**
* Returns the data-model (also known as the template context in some other template engines).
*/
public TemplateHashModel getDataModel() {
final TemplateHashModel result = new TemplateHashModel() {
public boolean isEmpty() {
return false;
}
public TemplateModel get(String key) throws TemplateModelException {
TemplateModel value = rootDataModel.get(key);
if (value == null) {
value = configuration.getSharedVariable(key);
}
return value;
}
};
if (rootDataModel instanceof TemplateHashModelEx) {
return new TemplateHashModelEx() {
public boolean isEmpty() throws TemplateModelException {
return result.isEmpty();
}
public TemplateModel get(String key) throws TemplateModelException {
return result.get(key);
}
// NB: The methods below do not take into account
// configuration shared variables even though
// the hash will return them, if only for BWC reasons
public TemplateCollectionModel values() throws TemplateModelException {
return ((TemplateHashModelEx) rootDataModel).values();
}
public TemplateCollectionModel keys() throws TemplateModelException {
return ((TemplateHashModelEx) rootDataModel).keys();
}
public int size() throws TemplateModelException {
return ((TemplateHashModelEx) rootDataModel).size();
}
};
}
return result;
}
/**
* Returns the read-only hash of globally visible variables. This is the correspondent of FTL <code>.globals</code>
* hash. That is, you see the variables created with <code>&lt;#global ...&gt;</code>, and the variables of the
* data-model. To create new global variables, use {@link #setGlobalVariable setGlobalVariable}.
*/
public TemplateHashModel getGlobalVariables() {
return new TemplateHashModel() {
public boolean isEmpty() {
return false;
}
public TemplateModel get(String key) throws TemplateModelException {
TemplateModel result = globalNamespace.get(key);
if (result == null) {
result = rootDataModel.get(key);
}
if (result == null) {
result = configuration.getSharedVariable(key);
}
return result;
}
};
}
private void pushElement(TemplateElement element) {
final int newSize = ++instructionStackSize;
TemplateElement[] instructionStack = this.instructionStack;
if (newSize > instructionStack.length) {
final TemplateElement[] newInstructionStack = new TemplateElement[newSize * 2];
for (int i = 0; i < instructionStack.length; i++) {
newInstructionStack[i] = instructionStack[i];
}
instructionStack = newInstructionStack;
this.instructionStack = instructionStack;
}
instructionStack[newSize - 1] = element;
}
private void popElement() {
instructionStackSize--;
}
void replaceElementStackTop(TemplateElement instr) {
instructionStack[instructionStackSize - 1] = instr;
}
public TemplateNodeModel getCurrentVisitorNode() {
return currentVisitorNode;
}
/**
* sets TemplateNodeModel as the current visitor node. <tt>.current_node</tt>
*/
public void setCurrentVisitorNode(TemplateNodeModel node) {
currentVisitorNode = node;
}
TemplateModel getNodeProcessor(TemplateNodeModel node) throws TemplateException {
String nodeName = node.getNodeName();
if (nodeName == null) {
throw new _MiscTemplateException(this, "Node name is null.");
}
TemplateModel result = getNodeProcessor(nodeName, node.getNodeNamespace(), 0);
if (result == null) {
String type = node.getNodeType();
/* DD: Original version: */
if (type == null) {
type = "default";
}
result = getNodeProcessor("@" + type, null, 0);
/*
* DD: Jonathan's non-BC version and IMHO otherwise wrong version: if (type != null) { result =
* getNodeProcessor("@" + type, null, 0); } if (result == null) { result = getNodeProcessor("@default",
* null, 0); }
*/
}
return result;
}
private TemplateModel getNodeProcessor(final String nodeName, final String nsURI, int startIndex)
throws TemplateException {
TemplateModel result = null;
int i;
for (i = startIndex; i < nodeNamespaces.size(); i++) {
Namespace ns = null;
try {
ns = (Namespace) nodeNamespaces.get(i);
} catch (ClassCastException cce) {
throw new _MiscTemplateException(this,
"A \"using\" clause should contain a sequence of namespaces or strings that indicate the "
+ "location of importable macro libraries.");
}
result = getNodeProcessor(ns, nodeName, nsURI);
if (result != null)
break;
}
if (result != null) {
this.nodeNamespaceIndex = i + 1;
this.currentNodeName = nodeName;
this.currentNodeNS = nsURI;
}
return result;
}
private TemplateModel getNodeProcessor(Namespace ns, String localName, String nsURI) throws TemplateException {
TemplateModel result = null;
if (nsURI == null) {
result = ns.get(localName);
if (!(result instanceof Macro) && !(result instanceof TemplateTransformModel)) {
result = null;
}
} else {
Template template = ns.getTemplate();
String prefix = template.getPrefixForNamespace(nsURI);
if (prefix == null) {
// The other template cannot handle this node
// since it has no prefix registered for the namespace
return null;
}
if (prefix.length() > 0) {
result = ns.get(prefix + ":" + localName);
if (!(result instanceof Macro) && !(result instanceof TemplateTransformModel)) {
result = null;
}
} else {
if (nsURI.length() == 0) {
result = ns.get(Template.NO_NS_PREFIX + ":" + localName);
if (!(result instanceof Macro) && !(result instanceof TemplateTransformModel)) {
result = null;
}
}
if (nsURI.equals(template.getDefaultNS())) {
result = ns.get(Template.DEFAULT_NAMESPACE_PREFIX + ":" + localName);
if (!(result instanceof Macro) && !(result instanceof TemplateTransformModel)) {
result = null;
}
}
if (result == null) {
result = ns.get(localName);
if (!(result instanceof Macro) && !(result instanceof TemplateTransformModel)) {
result = null;
}
}
}
}
return result;
}
/**
* Emulates <code>include</code> directive, except that <code>name</code> must be tempate root relative.
*
* <p>
* It's the same as <code>include(getTemplateForInclusion(name, encoding, parse))</code>. But, you may want to
* separately call these two methods, so you can determine the source of exceptions more precisely, and thus achieve
* more intelligent error handling.
*
* @see #getTemplateForInclusion(String name, String encoding, boolean parse)
* @see #include(Template includedTemplate)
*/
public void include(String name, String encoding, boolean parse)
throws IOException, TemplateException {
include(getTemplateForInclusion(name, encoding, parse));
}
/**
* Same as {@link #getTemplateForInclusion(String, String, boolean, boolean)} with {@code false}
* {@code ignoreMissing} argument.
*/
public Template getTemplateForInclusion(String name, String encoding, boolean parse)
throws IOException {
return getTemplateForInclusion(name, encoding, parse, false);
}
/**
* Gets a template for inclusion; used for implementing {@link #include(Template includedTemplate)}. The advantage
* over simply using <code>config.getTemplate(...)</code> is that it chooses the default encoding exactly as the
* <code>include</code> directive does, although that encoding selection mechanism is a historical baggage and
* considered to be harmful.
*
* @param name
* the name of the template, relatively to the template root directory (not the to the directory of the
* currently executing template file). (Note that you can use
* {@link freemarker.cache.TemplateCache#getFullTemplatePath} to convert paths to template root relative
* paths.) For more details see the identical parameter of
* {@link Configuration#getTemplate(String, Locale, String, boolean, boolean)}
*
* @param encoding
* the charset of the obtained template. If {@code null}, the encoding of the top template that is
* currently being processed in this {@link Environment} is used, which can lead to odd situations, so
* using {@code null} is not recommended. In most applications, the value of
* {@link Configuration#getEncoding(Locale)} (or {@link Configuration#getDefaultEncoding()}) should be
* used here.
*
* @param parseAsFTL
* See identical parameter of {@link Configuration#getTemplate(String, Locale, String, boolean, boolean)}
*
* @param ignoreMissing
* See identical parameter of {@link Configuration#getTemplate(String, Locale, String, boolean, boolean)}
*
* @return Same as {@link Configuration#getTemplate(String, Locale, String, boolean, boolean)}
* @throws IOException
* Same as exceptions thrown by
* {@link Configuration#getTemplate(String, Locale, String, boolean, boolean)}
*
* @since 2.3.21
*/
public Template getTemplateForInclusion(String name, String encoding, boolean parseAsFTL, boolean ignoreMissing)
throws IOException {
final Template inheritedTemplate = getTemplate();
if (encoding == null) {
// This branch shouldn't exist, as it doesn't make much sense to inherit encoding. But we have to keep BC.
encoding = inheritedTemplate.getEncoding();
if (encoding == null) {
encoding = configuration.getEncoding(this.getLocale());
}
}
Object customLookupCondition = inheritedTemplate.getCustomLookupCondition();
return configuration.getTemplate(
name, getLocale(), customLookupCondition,
encoding, parseAsFTL,
ignoreMissing);
}
/**
* Processes a Template in the context of this <code>Environment</code>, including its output in the
* <code>Environment</code>'s Writer.
*
* @param includedTemplate
* the template to process. Note that it does <em>not</em> need to be a template returned by
* {@link #getTemplateForInclusion(String name, String encoding, boolean parse)}.
*/
public void include(Template includedTemplate)
throws TemplateException, IOException {
final Template prevTemplate;
final boolean parentReplacementOn = isBeforeIcI2322();
prevTemplate = getTemplate();
if (parentReplacementOn) {
setParent(includedTemplate);
} else {
legacyParent = includedTemplate;
}
importMacros(includedTemplate);
try {
visit(includedTemplate.getRootTreeNode());
} finally {
if (parentReplacementOn) {
setParent(prevTemplate);
} else {
legacyParent = prevTemplate;
}
}
}
/**
* Emulates <code>import</code> directive, except that <code>name</code> must be tempate root relative.
*
* <p>
* It's the same as <code>importLib(getTemplateForImporting(name), namespace)</code>. But, you may want to
* separately call these two methods, so you can determine the source of exceptions more precisely, and thus achieve
* more intelligent error handling.
*
* @see #getTemplateForImporting(String name)
* @see #importLib(Template includedTemplate, String namespace)
*/
public Namespace importLib(String name, String namespace)
throws IOException, TemplateException {
return importLib(getTemplateForImporting(name), namespace);
}
/**
* Gets a template for importing; used with {@link #importLib(Template importedTemplate, String namespace)}. The
* advantage over simply using <code>config.getTemplate(...)</code> is that it chooses the encoding as the
* <code>import</code> directive does.
*
* @param name
* the name of the template, relatively to the template root directory (not the to the directory of the
* currently executing template file!). (Note that you can use
* {@link freemarker.cache.TemplateCache#getFullTemplatePath} to convert paths to template root relative
* paths.)
*/
public Template getTemplateForImporting(String name) throws IOException {
return getTemplateForInclusion(name, null, true);
}
/**
* Emulates <code>import</code> directive.
*
* @param loadedTemplate
* the template to import. Note that it does <em>not</em> need to be a template returned by
* {@link #getTemplateForImporting(String name)}.
*/
public Namespace importLib(Template loadedTemplate, String namespace)
throws IOException, TemplateException {
if (loadedLibs == null) {
loadedLibs = new HashMap();
}
String templateName = loadedTemplate.getName();
Namespace existingNamespace = (Namespace) loadedLibs.get(templateName);
if (existingNamespace != null) {
if (namespace != null) {
setVariable(namespace, existingNamespace);
if (isIcI2324OrLater() && currentNamespace == mainNamespace) {
globalNamespace.put(namespace, existingNamespace);
}
}
} else {
Namespace newNamespace = new Namespace(loadedTemplate);
if (namespace != null) {
setVariable(namespace, newNamespace);
if (currentNamespace == mainNamespace) {
globalNamespace.put(namespace, newNamespace);
}
}
Namespace prevNamespace = this.currentNamespace;
this.currentNamespace = newNamespace;
loadedLibs.put(templateName, currentNamespace);
Writer prevOut = out;
this.out = NullWriter.INSTANCE;
try {
include(loadedTemplate);
} finally {
this.out = prevOut;
this.currentNamespace = prevNamespace;
}
}
return (Namespace) loadedLibs.get(templateName);
}
/**
* Resolves a reference to a template (like the one used in {@code #include} or {@code #import}), assuming a base
* name. This gives a full (that is, absolute), even if non-normalized template name, that could be used for
* {@link Configuration#getTemplate(String)}. This is mostly used when a template refers to another template.
*
* @param baseName
* The name to which relative {@code targetName}-s are relative to. Maybe {@code null}, which usually
* means that the base is the root "directory". Assuming {@link TemplateNameFormat#DEFAULT_2_3_0} or
* {@link TemplateNameFormat#DEFAULT_2_4_0}, the rules are as follows. If you want to specify a base
* directory here, it must end with {@code "/"}. If it doesn't end with {@code "/"}, it's parent
* directory will be used as the base path. Might starts with a scheme part (like {@code "foo://"}, or
* with {@link TemplateNameFormat#DEFAULT_2_4_0} even just {@code "foo:"}).
* @param targetName
* The name of the template, which is either a relative or absolute name. Assuming
* {@link TemplateNameFormat#DEFAULT_2_3_0} or {@link TemplateNameFormat#DEFAULT_2_4_0}, the rules are as
* follows. If it starts with {@code "/"} or contains a scheme part separator ({@code "://"}, also, with
* {@link TemplateNameFormat#DEFAULT_2_4_0} a {@code ":"} with no {@code "/"} anywhere before it) then
* it's an absolute name, otherwise it's a relative path. Relative paths are interpreted relatively to
* the {@code baseName}. Absolute names are simply returned as is, ignoring the {@code baseName}, except,
* when the {@code baseName} has scheme part while the {@code targetName} doesn't have, then the schema
* of the {@code baseName} is prepended to the {@code targetName}.
*
* @since 2.3.22
*/
public String toFullTemplateName(String baseName, String targetName)
throws MalformedTemplateNameException {
if (isClassicCompatible()) {
// Early FM only had absolute names.
return targetName;
}
return _CacheAPI.toAbsoluteName(configuration.getTemplateNameFormat(), baseName, targetName);
}
String renderElementToString(TemplateElement te) throws IOException, TemplateException {
Writer prevOut = out;
try {
StringWriter sw = new StringWriter();
this.out = sw;
visit(te);
return sw.toString();
} finally {
this.out = prevOut;
}
}
void importMacros(Template template) {
for (Iterator it = template.getMacros().values().iterator(); it.hasNext();) {
visitMacroDef((Macro) it.next());
}
}
/**
* @return the namespace URI registered for this prefix, or null. This is based on the mappings registered in the
* current namespace.
*/
public String getNamespaceForPrefix(String prefix) {
return currentNamespace.getTemplate().getNamespaceForPrefix(prefix);
}
public String getPrefixForNamespace(String nsURI) {
return currentNamespace.getTemplate().getPrefixForNamespace(nsURI);
}
/**
* @return the default node namespace for the current FTL namespace
*/
public String getDefaultNS() {
return currentNamespace.getTemplate().getDefaultNS();
}
/**
* A hook that Jython uses.
*/
public Object __getitem__(String key) throws TemplateModelException {
return BeansWrapper.getDefaultInstance().unwrap(getVariable(key));
}
/**
* A hook that Jython uses.
*/
public void __setitem__(String key, Object o) throws TemplateException {
setGlobalVariable(key, getObjectWrapper().wrap(o));
}
private IdentityHashMap<Object, Object> customStateVariables;
/**
* Returns the value of a custom state variable, or {@code null} if it's missing; see
* {@link #setCustomState(Object, Object)} for more.
*
* @since 2.3.24
*/
public Object getCustomState(Object identityKey) {
if (customStateVariables == null) {
return null;
}
return customStateVariables.get(identityKey);
}
/**
* Sets the value of a custom state variable. Custom state variables meant to be used by
* {@link TemplateNumberFormatFactory}-es, {@link TemplateDateFormatFactory}-es, and similar user-implementable,
* pluggable objects, which want to maintain an {@link Environment}-scoped state (such as a cache).
*
* @param identityKey
* The key that identifies the variable, by its object identity (not by {@link Object#equals(Object)}).
* This should be something like a {@code private static final Object CUSTOM_STATE_KEY = new Object();}
* in the class that needs this state variable.
* @param value
* The value of the variable. Can be anything, even {@code null}.
*
* @return The previous value of the variable, or {@code null} if the variable didn't exist.
*
* @since 2.3.24
*/
public Object setCustomState(Object identityKey, Object value) {
IdentityHashMap<Object, Object> customStateVariables = this.customStateVariables;
if (customStateVariables == null) {
customStateVariables = new IdentityHashMap<Object, Object>();
this.customStateVariables = customStateVariables;
}
return customStateVariables.put(identityKey, value);
}
final class NestedElementTemplateDirectiveBody implements TemplateDirectiveBody {
private final TemplateElement[] childBuffer;
private NestedElementTemplateDirectiveBody(TemplateElement[] childBuffer) {
this.childBuffer = childBuffer;
}
public void render(Writer newOut) throws TemplateException, IOException {
Writer prevOut = out;
out = newOut;
try {
visit(childBuffer);
} finally {
out = prevOut;
}
}
TemplateElement[] getChildrenBuffer() {
return childBuffer;
}
}
public class Namespace extends SimpleHash {
private final Template template;
Namespace() {
this.template = Environment.this.getTemplate();
}
Namespace(Template template) {
this.template = template;
}
/**
* @return the Template object with which this Namespace is associated.
*/
public Template getTemplate() {
return template == null ? Environment.this.getTemplate() : template;
}
}
private static final Writer EMPTY_BODY_WRITER = new Writer() {
@Override
public void write(char[] cbuf, int off, int len) throws IOException {
if (len > 0) {
throw new IOException(
"This transform does not allow nested content.");
}
}
@Override
public void flush() {
}
@Override
public void close() {
}
};
private boolean isBeforeIcI2322() {
return configuration.getIncompatibleImprovements().intValue() < _TemplateAPI.VERSION_INT_2_3_22;
}
boolean isIcI2324OrLater() {
return configuration.getIncompatibleImprovements().intValue() >= _TemplateAPI.VERSION_INT_2_3_24;
}
/**
* See {@link #setFastInvalidReferenceExceptions(boolean)}.
*/
boolean getFastInvalidReferenceExceptions() {
return fastInvalidReferenceExceptions;
}
/**
* Sets if for invalid references {@link InvalidReferenceException#FAST_INSTANCE} should be thrown, or a new
* {@link InvalidReferenceException}. The "fast" instance is used if we know that the error will be handled so that
* its message will not be logged or shown anywhere.
*/
boolean setFastInvalidReferenceExceptions(boolean b) {
boolean res = fastInvalidReferenceExceptions;
fastInvalidReferenceExceptions = b;
return res;
}
}