- /*
- * 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.tools.ant.util;
-
- import java.io.File;
- import org.apache.tools.ant.BuildException;
- import org.apache.tools.ant.launch.Locator;
-
- /**
- * ClassLoader utility methods
- *
- */
- public class LoaderUtils {
- /**
- * Set the context classloader
- *
- * @param loader the ClassLoader to be used as the context class loader
- * on the current thread.
- */
- public static void setContextClassLoader(ClassLoader loader) {
- Thread currentThread = Thread.currentThread();
- currentThread.setContextClassLoader(loader);
- }
-
-
- /**
- * JDK1.1 compatible access to set the context class loader.
- *
- * @return the ClassLoader instance being used as the context
- * classloader on the current thread. Returns null on JDK 1.1
- */
- public static ClassLoader getContextClassLoader() {
- Thread currentThread = Thread.currentThread();
- return currentThread.getContextClassLoader();
- }
-
- /**
- * Indicates if the context class loader methods are available
- *
- * @return true if the get and set methods dealing with the context
- * classloader are available.
- */
- public static boolean isContextLoaderAvailable() {
- return true;
- }
-
- /**
- * Normalize a source location
- *
- * @param source the source location to be normalized.
- *
- * @return the normalized source location.
- */
- private static File normalizeSource(File source) {
- if (source != null) {
- FileUtils fileUtils = FileUtils.newFileUtils();
- try {
- source = fileUtils.normalize(source.getAbsolutePath());
- } catch (BuildException e) {
- // relative path
- }
- }
-
- return source;
- }
-
- /**
- * Find the directory or jar file the class has been loaded from.
- *
- * @param c the class whose location is required.
- * @return the file or jar with the class or null if we cannot
- * determine the location.
- *
- * @since Ant 1.6
- */
- public static File getClassSource(Class c) {
- return normalizeSource(Locator.getClassSource(c));
- }
-
- /**
- * Find the directory or a give resource has been loaded from.
- *
- * @param c the classloader to be consulted for the source
- * @param resource the resource whose location is required.
- *
- * @return the file with the resource source or null if
- * we cannot determine the location.
- *
- * @since Ant 1.6
- */
- public static File getResourceSource(ClassLoader c, String resource) {
- if (c == null) {
- c = LoaderUtils.class.getClassLoader();
- }
- return normalizeSource(Locator.getResourceSource(c, resource));
- }
- }
-