/* * Copyright 1999-2005 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.log4j.lf5.util;import java.io.InputStream;import java.net.URL;/** * ResourceUtils.  Provide a set of convenience methods for working with * Resources. * * @see org.apache.log4j.lf5.util.Resource * * @author Michael J. Sikorsky * @author Robert Shaw */// Contributed by ThoughtWorks Inc.public class ResourceUtils {  //--------------------------------------------------------------------------  //   Constants:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Protected Variables:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Private Variables:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Constructors:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Public Methods:  //--------------------------------------------------------------------------  /**   * Get the InputStream for this resource.  Note: to convert an InputStream   * into an InputReader, use: new InputStreamReader(InputStream).   *   * @param object   The object to grab the Classloader from.   *                 This parameter is quite important from a   *                 visibility of resources standpoint as the   *                 hierarchy of Classloaders plays a role.   *   * @param resource The resource to load.   *   * @return If the Resource was found, the InputStream, otherwise null.   *   * @see Resource   * @see #getResourceAsURL(Object,Resource)   * @see InputStream   */  public static InputStream getResourceAsStream(Object object, Resource resource) {    ClassLoader loader = object.getClass().getClassLoader();    InputStream in = null;    if (loader != null) {      in = loader.getResourceAsStream(resource.getName());    } else {      in = ClassLoader.getSystemResourceAsStream(resource.getName());    }    return in;  }  /**   * Get the URL for this resource.   *   * @param object   The object to grab the Classloader from.   *                 This parameter is quite important from a   *                 visibility of resources standpoint as the   *                 hierarchy of Classloaders plays a role.   *   * @param resource The resource to load.   *   * @return If the Resource was found, the URL, otherwise null.   *   * @see Resource   * @see #getResourceAsStream(Object,Resource)   */  public static URL getResourceAsURL(Object object, Resource resource) {    ClassLoader loader = object.getClass().getClassLoader();    URL url = null;    if (loader != null) {      url = loader.getResource(resource.getName());    } else {      url = ClassLoader.getSystemResource(resource.getName());    }    return (url);  }  //--------------------------------------------------------------------------  //   Protected Methods:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Private Methods:  //--------------------------------------------------------------------------  //--------------------------------------------------------------------------  //   Nested Top-Level Classes or Interfaces:  //--------------------------------------------------------------------------}