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/*
 * 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 org.apache.catalina.startup;


import java.lang.reflect.Method;

import org.apache.catalina.Container;
import org.apache.tomcat.util.digester.Rule;
import org.xml.sax.Attributes;


/**
 * 

Rule that copies the parentClassLoader property from the * next-to-top item on the stack (which must be a Container) * to the top item on the stack (which must also be a * Container).

* * @author Craig R. McClanahan */ public class CopyParentClassLoaderRule extends Rule { // ----------------------------------------------------------- Constructors /** * Construct a new instance of this Rule. */ public CopyParentClassLoaderRule() { } // --------------------------------------------------------- Public Methods /** * Handle the beginning of an XML element. * * @param attributes The attributes of this element * * @exception Exception if a processing error occurs */ @Override public void begin(String namespace, String name, Attributes attributes) throws Exception { if (digester.getLogger().isDebugEnabled()) { digester.getLogger().debug("Copying parent class loader"); } Container child = (Container) digester.peek(0); Object parent = digester.peek(1); Method method = parent.getClass().getMethod("getParentClassLoader", new Class[0]); ClassLoader classLoader = (ClassLoader) method.invoke(parent, new Object[0]); child.setParentClassLoader(classLoader); StringBuilder code = digester.getGeneratedCode(); if (code != null) { code.append(digester.toVariableName(child)).append(".setParentClassLoader("); code.append(digester.toVariableName(parent)).append(".getParentClassLoader());"); code.append(System.lineSeparator()); } } }




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