| /* |
| * Copyright (c) 2003 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| |
| package freemarker.core; |
| |
| import java.io.IOException; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.Map; |
| |
| import freemarker.template.SimpleScalar; |
| import freemarker.template.TemplateException; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateTransformModel; |
| |
| /** |
| * Like [#local x]...[/#local]. |
| */ |
| final class BlockAssignment extends TemplateElement { |
| |
| private final String varName; |
| private final Expression namespaceExp; |
| private final int scope; |
| |
| BlockAssignment(TemplateElement nestedBlock, String varName, int scope, Expression namespaceExp) { |
| this.nestedBlock = nestedBlock; |
| this.varName = varName; |
| this.namespaceExp = namespaceExp; |
| this.scope = scope; |
| } |
| |
| void accept(Environment env) throws TemplateException, IOException { |
| if (nestedBlock != null) { |
| env.visitAndTransform(nestedBlock, new CaptureOutput(env), null); |
| } else { |
| TemplateModel value = new SimpleScalar(""); |
| if (namespaceExp != null) { |
| Environment.Namespace ns = (Environment.Namespace) namespaceExp.eval(env); |
| ns.put(varName, value); |
| } else if (scope == Assignment.NAMESPACE) { |
| env.setVariable(varName, value); |
| } else if (scope == Assignment.GLOBAL) { |
| env.setGlobalVariable(varName, value); |
| } else if (scope == Assignment.LOCAL) { |
| env.setLocalVariable(varName, value); |
| } |
| } |
| } |
| |
| private class CaptureOutput implements TemplateTransformModel { |
| private final Environment env; |
| private final Environment.Namespace fnsModel; |
| |
| CaptureOutput(Environment env) throws TemplateException { |
| this.env = env; |
| TemplateModel nsModel = null; |
| if(namespaceExp != null) { |
| nsModel = namespaceExp.eval(env); |
| if (!(nsModel instanceof Environment.Namespace)) { |
| throw new UnexpectedTypeException(namespaceExp, nsModel, "namespace", env); |
| } |
| } |
| fnsModel = (Environment.Namespace )nsModel; |
| } |
| |
| public Writer getWriter(Writer out, Map args) { |
| return new StringWriter() { |
| public void close() { |
| SimpleScalar result = new SimpleScalar(toString()); |
| switch(scope) { |
| case Assignment.NAMESPACE: { |
| if(fnsModel != null) { |
| fnsModel.put(varName, result); |
| } |
| else { |
| env.setVariable(varName, result); |
| } |
| break; |
| } |
| case Assignment.LOCAL: { |
| env.setLocalVariable(varName, result); |
| break; |
| } |
| case Assignment.GLOBAL: { |
| env.setGlobalVariable(varName, result); |
| break; |
| } |
| } |
| } |
| }; |
| } |
| } |
| |
| protected String dump(boolean canonical) { |
| StringBuffer sb = new StringBuffer(); |
| if (canonical) sb.append("<"); |
| sb.append(getNodeTypeSymbol()); |
| sb.append(' '); |
| sb.append(varName); |
| if (namespaceExp != null) { |
| sb.append(" in "); |
| sb.append(namespaceExp.getCanonicalForm()); |
| } |
| if (canonical) { |
| sb.append('>'); |
| sb.append(nestedBlock == null ? "" : nestedBlock.getCanonicalForm()); |
| sb.append("</"); |
| sb.append(getNodeTypeSymbol()); |
| sb.append('>'); |
| } else { |
| sb.append(" = .nested_output"); |
| } |
| return sb.toString(); |
| } |
| |
| String getNodeTypeSymbol() { |
| return Assignment.getDirectiveName(scope); |
| } |
| |
| int getParameterCount() { |
| return 3; |
| } |
| |
| Object getParameterValue(int idx) { |
| switch (idx) { |
| case 0: return varName; |
| case 1: return new Integer(scope); |
| case 2: return namespaceExp; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| ParameterRole getParameterRole(int idx) { |
| switch (idx) { |
| case 0: return ParameterRole.ASSIGNMENT_TARGET; |
| case 1: return ParameterRole.VARIABLE_SCOPE; |
| case 2: return ParameterRole.NAMESPACE; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| boolean isIgnorable() { |
| return false; |
| } |
| } |