| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 The Apache Software Foundation. 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 acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * 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 APACHE SOFTWARE FOUNDATION 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 Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xalan.extensions; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Vector; |
| |
| import javax.xml.transform.TransformerException; |
| |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.templates.ElemTemplateElement; |
| import org.apache.xalan.templates.Stylesheet; |
| import org.apache.xalan.trace.ExtensionEvent; |
| import org.apache.xalan.transformer.TransformerImpl; |
| import org.apache.xpath.functions.FuncExtFunction; |
| import org.apache.xpath.objects.XObject; |
| |
| /** |
| * Represents an extension namespace for XPath that handles java packages |
| * that may be fully or partially specified. |
| * It is recommended that the class URI be of one of the following forms: |
| * <pre> |
| * xalan://partial.class.name |
| * xalan:// |
| * http://xml.apache.org/xalan/java (which is the same as xalan://) |
| * </pre> |
| * However, we do not enforce this. If the class name contains a |
| * a /, we only use the part to the right of the rightmost slash. |
| * In addition, we ignore any "class:" prefix. |
| * Provides functions to test a function's existence and call a function. |
| * Also provides functions to test an element's existence and call an |
| * element. |
| * |
| * @author <a href="mailto:garyp@firstech.com">Gary L Peskin</a> |
| * |
| * @xsl.usage internal |
| */ |
| |
| |
| public class ExtensionHandlerJavaPackage extends ExtensionHandlerJava |
| { |
| |
| /** |
| * Construct a new extension namespace handler given all the information |
| * needed. |
| * |
| * @param namespaceUri the extension namespace URI that I'm implementing |
| * @param scriptLang language of code implementing the extension |
| * @param className the beginning of the class name of the class. This |
| * should be followed by a dot (.) |
| */ |
| public ExtensionHandlerJavaPackage(String namespaceUri, |
| String scriptLang, |
| String className) |
| { |
| super(namespaceUri, scriptLang, className); |
| } |
| |
| |
| /** |
| * Tests whether a certain function name is known within this namespace. |
| * Since this is for a package, we concatenate the package name used when |
| * this handler was created and the function name specified in the argument. |
| * There is |
| * no information regarding the arguments to the function call or |
| * whether the method implementing the function is a static method or |
| * an instance method. |
| * @param function name of the function being tested |
| * @return true if its known, false if not. |
| */ |
| |
| public boolean isFunctionAvailable(String function) |
| { |
| try |
| { |
| String fullName = m_className + function; |
| int lastDot = fullName.lastIndexOf("."); |
| if (lastDot >= 0) |
| { |
| Class myClass = getClassForName(fullName.substring(0, lastDot)); |
| Method[] methods = myClass.getMethods(); |
| int nMethods = methods.length; |
| function = fullName.substring(lastDot + 1); |
| for (int i = 0; i < nMethods; i++) |
| { |
| if (methods[i].getName().equals(function)) |
| return true; |
| } |
| } |
| } |
| catch (ClassNotFoundException cnfe) {} |
| |
| return false; |
| } |
| |
| |
| /** |
| * Tests whether a certain element name is known within this namespace. |
| * Looks for a method with the appropriate name and signature. |
| * This method examines both static and instance methods. |
| * @param function name of the function being tested |
| * @return true if its known, false if not. |
| */ |
| |
| public boolean isElementAvailable(String element) |
| { |
| try |
| { |
| String fullName = m_className + element; |
| int lastDot = fullName.lastIndexOf("."); |
| if (lastDot >= 0) |
| { |
| Class myClass = getClassForName(fullName.substring(0, lastDot)); |
| Method[] methods = myClass.getMethods(); |
| int nMethods = methods.length; |
| element = fullName.substring(lastDot + 1); |
| for (int i = 0; i < nMethods; i++) |
| { |
| if (methods[i].getName().equals(element)) |
| { |
| Class[] paramTypes = methods[i].getParameterTypes(); |
| if ( (paramTypes.length == 2) |
| && paramTypes[0].isAssignableFrom( |
| org.apache.xalan.extensions.XSLProcessorContext.class) |
| && paramTypes[1].isAssignableFrom( |
| org.apache.xalan.templates.ElemExtensionCall.class) ) |
| { |
| return true; |
| } |
| } |
| } |
| } |
| } |
| catch (ClassNotFoundException cnfe) {} |
| |
| return false; |
| } |
| |
| |
| /** |
| * Process a call to a function in the package java namespace. |
| * There are three possible types of calls: |
| * <pre> |
| * Constructor: |
| * packagens:class.name.new(arg1, arg2, ...) |
| * |
| * Static method: |
| * packagens:class.name.method(arg1, arg2, ...) |
| * |
| * Instance method: |
| * packagens:method(obj, arg1, arg2, ...) |
| * </pre> |
| * We use the following rules to determine the type of call made: |
| * <ol type="1"> |
| * <li>If the function name ends with a ".new", call the best constructor for |
| * class whose name is formed by concatenating the value specified on |
| * the namespace with the value specified in the function invocation |
| * before ".new".</li> |
| * <li>If the function name contains a period, call the best static method "method" |
| * in the class whose name is formed by concatenating the value specified on |
| * the namespace with the value specified in the function invocation.</li> |
| * <li>Otherwise, call the best instance method "method" |
| * in the class whose name is formed by concatenating the value specified on |
| * the namespace with the value specified in the function invocation. |
| * Note that a static method of the same |
| * name will <i>not</i> be called in the current implementation. This |
| * module does not verify that the obj argument is a member of the |
| * package namespace.</li> |
| * </ol> |
| * |
| * @param funcName Function name. |
| * @param args The arguments of the function call. |
| * |
| * @return the return value of the function evaluation. |
| * |
| * @throws TransformerException if parsing trouble |
| */ |
| |
| public Object callFunction (String funcName, |
| Vector args, |
| Object methodKey, |
| ExpressionContext exprContext) |
| throws TransformerException |
| { |
| |
| String className; |
| String methodName; |
| Class classObj; |
| Object targetObject; |
| int lastDot = funcName.lastIndexOf("."); |
| Object[] methodArgs; |
| Object[][] convertedArgs; |
| Class[] paramTypes; |
| |
| try |
| { |
| |
| if (funcName.endsWith(".new")) { // Handle constructor call |
| |
| methodArgs = new Object[args.size()]; |
| convertedArgs = new Object[1][]; |
| for (int i = 0; i < methodArgs.length; i++) |
| { |
| methodArgs[i] = args.elementAt(i); |
| } |
| Constructor c = (Constructor) getFromCache(methodKey, null, methodArgs); |
| if (c != null) |
| { |
| try |
| { |
| paramTypes = c.getParameterTypes(); |
| MethodResolver.convertParams(methodArgs, convertedArgs, paramTypes, exprContext); |
| return c.newInstance(convertedArgs[0]); |
| } |
| catch (InvocationTargetException ite) |
| { |
| throw ite; |
| } |
| catch(Exception e) |
| { |
| // Must not have been the right one |
| } |
| } |
| className = m_className + funcName.substring(0, lastDot); |
| try |
| { |
| classObj = getClassForName(className); |
| } |
| catch (ClassNotFoundException e) |
| { |
| throw new TransformerException(e); |
| } |
| c = MethodResolver.getConstructor(classObj, |
| methodArgs, |
| convertedArgs, |
| exprContext); |
| putToCache(methodKey, null, methodArgs, c); |
| if (TransformerImpl.S_DEBUG) { |
| TransformerImpl trans = (TransformerImpl)exprContext.getXPathContext().getOwnerObject(); |
| trans.getTraceManager().fireExtensionEvent(new ExtensionEvent(trans, c, convertedArgs[0])); |
| Object result; |
| try { |
| result = c.newInstance(convertedArgs[0]); |
| } catch (Exception e) { |
| throw e; |
| } finally { |
| trans.getTraceManager().fireExtensionEndEvent(new ExtensionEvent(trans, c, convertedArgs[0])); |
| } |
| return result; |
| } else |
| return c.newInstance(convertedArgs[0]); |
| } |
| |
| else if (-1 != lastDot) { // Handle static method call |
| |
| methodArgs = new Object[args.size()]; |
| convertedArgs = new Object[1][]; |
| for (int i = 0; i < methodArgs.length; i++) |
| { |
| methodArgs[i] = args.elementAt(i); |
| } |
| Method m = (Method) getFromCache(methodKey, null, methodArgs); |
| if (m != null && !TransformerImpl.S_DEBUG) |
| { |
| try |
| { |
| paramTypes = m.getParameterTypes(); |
| MethodResolver.convertParams(methodArgs, convertedArgs, paramTypes, exprContext); |
| return m.invoke(null, convertedArgs[0]); |
| } |
| catch (InvocationTargetException ite) |
| { |
| throw ite; |
| } |
| catch(Exception e) |
| { |
| // Must not have been the right one |
| } |
| } |
| className = m_className + funcName.substring(0, lastDot); |
| methodName = funcName.substring(lastDot + 1); |
| try |
| { |
| classObj = getClassForName(className); |
| } |
| catch (ClassNotFoundException e) |
| { |
| throw new TransformerException(e); |
| } |
| m = MethodResolver.getMethod(classObj, |
| methodName, |
| methodArgs, |
| convertedArgs, |
| exprContext, |
| MethodResolver.STATIC_ONLY); |
| putToCache(methodKey, null, methodArgs, m); |
| if (TransformerImpl.S_DEBUG) { |
| TransformerImpl trans = (TransformerImpl)exprContext.getXPathContext().getOwnerObject(); |
| trans.getTraceManager().fireExtensionEvent(m, null, convertedArgs[0]); |
| Object result; |
| try { |
| result = m.invoke(null, convertedArgs[0]); |
| } catch (Exception e) { |
| throw e; |
| } finally { |
| trans.getTraceManager().fireExtensionEndEvent(m, null, convertedArgs[0]); |
| } |
| return result; |
| } |
| else |
| return m.invoke(null, convertedArgs[0]); |
| } |
| |
| else { // Handle instance method call |
| |
| if (args.size() < 1) |
| { |
| throw new TransformerException(XSLMessages.createMessage(XSLTErrorResources.ER_INSTANCE_MTHD_CALL_REQUIRES, new Object[]{funcName })); //"Instance method call to method " + funcName |
| //+ " requires an Object instance as first argument"); |
| } |
| targetObject = args.elementAt(0); |
| if (targetObject instanceof XObject) // Next level down for XObjects |
| targetObject = ((XObject) targetObject).object(); |
| methodArgs = new Object[args.size() - 1]; |
| convertedArgs = new Object[1][]; |
| for (int i = 0; i < methodArgs.length; i++) |
| { |
| methodArgs[i] = args.elementAt(i+1); |
| } |
| Method m = (Method) getFromCache(methodKey, targetObject, methodArgs); |
| if (m != null) |
| { |
| try |
| { |
| paramTypes = m.getParameterTypes(); |
| MethodResolver.convertParams(methodArgs, convertedArgs, paramTypes, exprContext); |
| return m.invoke(targetObject, convertedArgs[0]); |
| } |
| catch (InvocationTargetException ite) |
| { |
| throw ite; |
| } |
| catch(Exception e) |
| { |
| // Must not have been the right one |
| } |
| } |
| classObj = targetObject.getClass(); |
| m = MethodResolver.getMethod(classObj, |
| funcName, |
| methodArgs, |
| convertedArgs, |
| exprContext, |
| MethodResolver.INSTANCE_ONLY); |
| putToCache(methodKey, targetObject, methodArgs, m); |
| if (TransformerImpl.S_DEBUG) { |
| TransformerImpl trans = (TransformerImpl)exprContext.getXPathContext().getOwnerObject(); |
| trans.getTraceManager().fireExtensionEvent(m, targetObject, convertedArgs[0]); |
| Object result; |
| try { |
| result = m.invoke(targetObject, convertedArgs[0]); |
| } catch (Exception e) { |
| throw e; |
| } finally { |
| trans.getTraceManager().fireExtensionEndEvent(m, targetObject, convertedArgs[0]); |
| } |
| return result; |
| } else |
| return m.invoke(targetObject, convertedArgs[0]); |
| } |
| } |
| catch (InvocationTargetException ite) |
| { |
| Throwable resultException = ite; |
| Throwable targetException = ite.getTargetException(); |
| |
| if (targetException instanceof TransformerException) |
| throw ((TransformerException)targetException); |
| else if (targetException != null) |
| resultException = targetException; |
| |
| throw new TransformerException(resultException); |
| } |
| catch (Exception e) |
| { |
| // e.printStackTrace(); |
| throw new TransformerException(e); |
| } |
| } |
| |
| /** |
| * Process a call to an XPath extension function |
| * |
| * @param extFunction The XPath extension function |
| * @param args The arguments of the function call. |
| * @param exprContext The context in which this expression is being executed. |
| * @return the return value of the function evaluation. |
| * @throws TransformerException |
| */ |
| public Object callFunction(FuncExtFunction extFunction, |
| Vector args, |
| ExpressionContext exprContext) |
| throws TransformerException |
| { |
| return callFunction(extFunction.getFunctionName(), args, |
| extFunction.getMethodKey(), exprContext); |
| } |
| |
| /** |
| * Process a call to this extension namespace via an element. As a side |
| * effect, the results are sent to the TransformerImpl's result tree. |
| * For this namespace, only static element methods are currently supported. |
| * If instance methods are needed, please let us know your requirements. |
| * @param localPart Element name's local part. |
| * @param element The extension element being processed. |
| * @param transformer Handle to TransformerImpl. |
| * @param stylesheetTree The compiled stylesheet tree. |
| * @param mode The current mode. |
| * @param sourceTree The root of the source tree (but don't assume |
| * it's a Document). |
| * @param sourceNode The current context node. |
| * @param mode The current mode. |
| * @param methodKey A key that uniquely identifies this element call. |
| * @throws IOException if loading trouble |
| * @throws TransformerException if parsing trouble |
| */ |
| |
| public void processElement (String localPart, |
| ElemTemplateElement element, |
| TransformerImpl transformer, |
| Stylesheet stylesheetTree, |
| Object methodKey) |
| throws TransformerException, IOException |
| { |
| Object result = null; |
| Class classObj; |
| |
| Method m = (Method) getFromCache(methodKey, null, null); |
| if (null == m) |
| { |
| try |
| { |
| String fullName = m_className + localPart; |
| int lastDot = fullName.lastIndexOf("."); |
| if (lastDot < 0) |
| throw new TransformerException(XSLMessages.createMessage(XSLTErrorResources.ER_INVALID_ELEMENT_NAME, new Object[]{fullName })); //"Invalid element name specified " + fullName); |
| try |
| { |
| classObj = getClassForName(fullName.substring(0, lastDot)); |
| } |
| catch (ClassNotFoundException e) |
| { |
| throw new TransformerException(e); |
| } |
| localPart = fullName.substring(lastDot + 1); |
| m = MethodResolver.getElementMethod(classObj, localPart); |
| if (!Modifier.isStatic(m.getModifiers())) |
| throw new TransformerException(XSLMessages.createMessage(XSLTErrorResources.ER_ELEMENT_NAME_METHOD_STATIC, new Object[]{fullName })); //"Element name method must be static " + fullName); |
| } |
| catch (Exception e) |
| { |
| // e.printStackTrace (); |
| throw new TransformerException (e); |
| } |
| putToCache(methodKey, null, null, m); |
| } |
| |
| XSLProcessorContext xpc = new XSLProcessorContext(transformer, |
| stylesheetTree); |
| |
| try |
| { |
| if (TransformerImpl.S_DEBUG) { |
| transformer.getTraceManager().fireExtensionEvent(m, null, new Object[] {xpc, element}); |
| try { |
| result = m.invoke(null, new Object[] {xpc, element}); |
| } catch (Exception e) { |
| throw e; |
| } finally { |
| transformer.getTraceManager().fireExtensionEndEvent(m, null, new Object[] {xpc, element}); |
| } |
| } else |
| result = m.invoke(null, new Object[] {xpc, element}); |
| } |
| catch (InvocationTargetException ite) |
| { |
| Throwable resultException = ite; |
| Throwable targetException = ite.getTargetException(); |
| |
| if (targetException instanceof TransformerException) |
| throw ((TransformerException)targetException); |
| else if (targetException != null) |
| resultException = targetException; |
| |
| throw new TransformerException(resultException); |
| } |
| catch (Exception e) |
| { |
| // e.printStackTrace (); |
| throw new TransformerException (e); |
| } |
| |
| if (result != null) |
| { |
| xpc.outputToResultTree (stylesheetTree, result); |
| } |
| |
| } |
| |
| } |