- /*
- * ====================================================================
- *
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Commons", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- */
-
- package org.apache.commons.discovery.resource.classes;
-
- import java.net.URL;
- import java.util.Vector;
-
- import org.apache.commons.discovery.ResourceClass;
- import org.apache.commons.discovery.ResourceClassDiscover;
- import org.apache.commons.discovery.ResourceClassIterator;
- import org.apache.commons.discovery.log.DiscoveryLogFactory;
- import org.apache.commons.discovery.resource.ClassLoaders;
- import org.apache.commons.logging.Log;
-
-
- /**
- * The findResources() method will check every loader.
- *
- * @author Richard A. Sitze
- * @author Craig R. McClanahan
- * @author Costin Manolache
- * @author James Strachan
- */
- public class DiscoverClasses
- extends ResourceClassDiscoverImpl
- implements ResourceClassDiscover
- {
- private static Log log = DiscoveryLogFactory.newLog(DiscoverClasses.class);
- public static void setLog(Log _log) {
- log = _log;
- }
-
- /** Construct a new resource discoverer
- */
- public DiscoverClasses() {
- super();
- }
-
- /** Construct a new resource discoverer
- */
- public DiscoverClasses(ClassLoaders classLoaders) {
- super(classLoaders);
- }
-
- public ResourceClassIterator findResourceClasses(final String className) {
- final String resourceName = className.replace('.','/') + ".class";
-
- if (log.isDebugEnabled())
- log.debug("find: className='" + className + "'");
-
- return new ResourceClassIterator() {
- private Vector history = new Vector();
- private int idx = 0;
- private ResourceClass resource = null;
-
- public boolean hasNext() {
- if (resource == null) {
- resource = getNextClass();
- }
- return resource != null;
- }
-
- public ResourceClass nextResourceClass() {
- ResourceClass element = resource;
- resource = null;
- return element;
- }
-
- private ResourceClass getNextClass() {
- while (idx < getClassLoaders().size()) {
- ClassLoader loader = getClassLoaders().get(idx++);
- URL url = loader.getResource(resourceName);
- if (url != null) {
- if (!history.contains(url)) {
- history.addElement(url);
-
- if (log.isDebugEnabled())
- log.debug("getNextClass: next URL='" + url + "'");
-
- return new ResourceClass(className, url, loader);
- }
- if (log.isDebugEnabled())
- log.debug("getNextClass: duplicate URL='" + url + "'");
- } else {
- if (log.isDebugEnabled())
- log.debug("getNextClass: loader " + loader + ": '" + resourceName + "' not found");
- }
- }
- return null;
- }
- };
- }
- }