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Posted to commits@servicemix.apache.org by ff...@apache.org on 2014/09/02 09:18:54 UTC
svn commit: r1621939 -
/servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java
Author: ffang
Date: Tue Sep 2 07:18:54 2014
New Revision: 1621939
URL: http://svn.apache.org/r1621939
Log:
[SMX4-1815]add TCCL as fallback classloader for xalan ExtensionHandler
Added:
servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java
Added: servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java
URL: http://svn.apache.org/viewvc/servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java?rev=1621939&view=auto
==============================================================================
--- servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java (added)
+++ servicemix/smx4/bundles/trunk/xalan-2.7.2/src/main/java/org/apache/xalan/extensions/ExtensionHandler.java Tue Sep 2 07:18:54 2014
@@ -0,0 +1,154 @@
+/*
+ * 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.
+ */
+/*
+ * $Id: ExtensionHandler.java 468637 2006-10-28 06:51:02Z minchau $
+ */
+package org.apache.xalan.extensions;
+
+import java.io.IOException;
+import java.util.Vector;
+
+import javax.xml.transform.TransformerException;
+
+import org.apache.xalan.templates.ElemTemplateElement;
+import org.apache.xalan.templates.Stylesheet;
+import org.apache.xalan.transformer.TransformerImpl;
+import org.apache.xpath.functions.FuncExtFunction;
+
+/**
+ * Abstract base class for handling an extension namespace for XPath.
+ * Provides functions to test a function's existence and call a function.
+ * Also provides functions for calling an element and testing for
+ * an element's existence.
+ *
+ * @author Sanjiva Weerawarana (sanjiva@watson.ibm.com)
+ * @xsl.usage internal
+ */
+public abstract class ExtensionHandler
+{
+
+ /** uri of the extension namespace */
+ protected String m_namespaceUri;
+
+ /** scripting language of implementation */
+ protected String m_scriptLang;
+
+ /**
+ * This method loads a class using the context class loader if we're
+ * running under Java2 or higher.
+ *
+ * @param className Name of the class to load
+ */
+ static Class getClassForName(String className)
+ throws ClassNotFoundException
+ {
+ // Hack for backwards compatibility with XalanJ1 stylesheets
+ if(className.equals("org.apache.xalan.xslt.extensions.Redirect")) {
+ className = "org.apache.xalan.lib.Redirect";
+ }
+
+ try {
+
+ return ObjectFactory.findProviderClass(
+ className, ObjectFactory.findClassLoader(), true);
+ } catch (ClassNotFoundException cnfe) {
+ //add TCCL as fallback
+ return ObjectFactory.findProviderClass(
+ className, Thread.currentThread().getContextClassLoader(), true);
+ }
+ }
+
+ /**
+ * 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
+ */
+ protected ExtensionHandler(String namespaceUri, String scriptLang)
+ {
+ m_namespaceUri = namespaceUri;
+ m_scriptLang = scriptLang;
+ }
+
+ /**
+ * Tests whether a certain function name is known within this namespace.
+ * @param function name of the function being tested
+ * @return true if its known, false if not.
+ */
+ public abstract boolean isFunctionAvailable(String function);
+
+ /**
+ * Tests whether a certain element name is known within this namespace.
+ * @param element Name of element to check
+ * @return true if its known, false if not.
+ */
+ public abstract boolean isElementAvailable(String element);
+
+ /**
+ * Process a call to a function.
+ *
+ * @param funcName Function name.
+ * @param args The arguments of the function call.
+ * @param methodKey A key that uniquely identifies this class and method call.
+ * @param exprContext The context in which this expression is being executed.
+ *
+ * @return the return value of the function evaluation.
+ *
+ * @throws TransformerException if parsing trouble
+ */
+ public abstract Object callFunction(
+ String funcName, Vector args, Object methodKey,
+ ExpressionContext exprContext) throws TransformerException;
+
+ /**
+ * Process a call to a 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 if parsing trouble
+ */
+ public abstract Object callFunction(
+ FuncExtFunction extFunction, Vector args,
+ ExpressionContext exprContext) throws TransformerException;
+
+ /**
+ * Process a call to this extension namespace via an element. As a side
+ * effect, the results are sent to the TransformerImpl's result tree.
+ *
+ * @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 methodKey A key that uniquely identifies this class and method call.
+ *
+ * @throws XSLProcessorException thrown if something goes wrong
+ * while running the extension handler.
+ * @throws MalformedURLException if loading trouble
+ * @throws FileNotFoundException if loading trouble
+ * @throws IOException if loading trouble
+ * @throws TransformerException if parsing trouble
+ */
+ public abstract void processElement(
+ String localPart, ElemTemplateElement element, TransformerImpl transformer,
+ Stylesheet stylesheetTree, Object methodKey) throws TransformerException, IOException;
+}