| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed 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.commons.jelly.tags.core; |
| |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.util.ClassLoaderUtils; |
| |
| /** Abstract base tag providing {@link ClassLoader} support. |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @author Rodney Waldhoff |
| * @version $Revision: 1.5 $ |
| */ |
| public abstract class BaseClassLoaderTag extends TagSupport { |
| /** |
| * The class loader to use for instantiating application objects. |
| * If not specified, the context class loader, or the class loader |
| * used to load XMLParser itself, is used, based on the value of the |
| * <code>useContextClassLoader</code> variable. |
| */ |
| protected ClassLoader classLoader = null; |
| |
| /** |
| * Do we want to use the Context ClassLoader when loading classes |
| * for instantiating new objects? Default is <code>false</code>. |
| */ |
| protected boolean useContextClassLoader = false; |
| |
| /** |
| * Return the class loader to be used for instantiating application objects |
| * when required. This is determined based upon the following rules: |
| * <ul> |
| * <li>The class loader set by <code>setClassLoader()</code>, if any</li> |
| * <li>The thread context class loader, if it exists and the |
| * <code>useContextClassLoader</code> property is set to true</li> |
| * <li>The class loader used to load the XMLParser class itself. |
| * </ul> |
| */ |
| public ClassLoader getClassLoader() { |
| return ClassLoaderUtils.getClassLoader(classLoader, useContextClassLoader, getClass()); |
| } |
| |
| /** |
| * Set the class loader to be used for instantiating application objects |
| * when required. |
| * |
| * @param classLoader The new class loader to use, or <code>null</code> |
| * to revert to the standard rules |
| */ |
| public void setClassLoader(ClassLoader classLoader) { |
| this.classLoader = classLoader; |
| } |
| |
| /** |
| * Return the boolean as to whether the context classloader should be used. |
| */ |
| public boolean getUseContextClassLoader() { |
| return useContextClassLoader; |
| } |
| |
| /** |
| * Determine whether to use the Context ClassLoader (the one found by |
| * calling <code>Thread.currentThread().getContextClassLoader()</code>) |
| * to resolve/load classes. If not |
| * using Context ClassLoader, then the class-loading defaults to |
| * using the calling-class' ClassLoader. |
| * |
| * @param boolean determines whether to use JellyContext ClassLoader. |
| */ |
| public void setUseContextClassLoader(boolean use) { |
| useContextClassLoader = use; |
| } |
| } |