struts2-core-2.1.8.1 xwork-core-2.1.6源码

/* * Copyright (c) 2002-2003 by OpenSymphony * All rights reserved. */ package com.opensymphony.xwork2.util.finder; import org.apache.commons.lang.StringUtils; import java.io.BufferedInputStream; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.net.*; import java.util.*; import java.util.jar.JarEntry; import java.util.jar.JarFile; import com.opensymphony.xwork2.util.logging.Logger; import com.opensymphony.xwork2.util.logging.LoggerFactory; /** * @author David Blevins * @version $Rev$ $Date$ */ public class ResourceFinder { private static final Logger LOG = LoggerFactory.getLogger(ResourceFinder.class); private final URL[] urls; private final String path; private final ClassLoaderInterface classLoaderInterface; private final List<String> resourcesNotLoaded = new ArrayList<String>(); public ResourceFinder(URL... urls) { this(null, new ClassLoaderInterfaceDelegate(Thread.currentThread().getContextClassLoader()), urls); } public ResourceFinder(String path) { this(path, new ClassLoaderInterfaceDelegate(Thread.currentThread().getContextClassLoader()), null); } public ResourceFinder(String path, URL... urls) { this(path, new ClassLoaderInterfaceDelegate(Thread.currentThread().getContextClassLoader()), urls); } public ResourceFinder(String path, ClassLoaderInterface classLoaderInterface) { this(path, classLoaderInterface, null); } public ResourceFinder(String path, ClassLoaderInterface classLoaderInterface, URL... urls) { if (path == null){ path = ""; } else if (path.length() > 0 && !path.endsWith("/")) { path += "/"; } this.path = path; this.classLoaderInterface = classLoaderInterface == null ? new ClassLoaderInterfaceDelegate(Thread.currentThread().getContextClassLoader()) : classLoaderInterface ; for (int i = 0; urls != null && i < urls.length; i++) { URL url = urls[i]; if (url == null || isDirectory(url) || "jar".equals(url.getProtocol())) { continue; } try { urls[i] = new URL("jar", "", -1, url.toString() + "!/"); } catch (MalformedURLException e) { } } this.urls = (urls == null || urls.length == 0)? null : urls; } private static boolean isDirectory(URL url) { String file = url.getFile(); return (file.length() > 0 && file.charAt(file.length() - 1) == '/'); } /** * Returns a list of resources that could not be loaded in the last invoked findAvailable* or * mapAvailable* methods. * <p/> * The list will only contain entries of resources that match the requirements * of the last invoked findAvailable* or mapAvailable* methods, but were unable to be * loaded and included in their results. * <p/> * The list returned is unmodifiable and the results of this method will change * after each invocation of a findAvailable* or mapAvailable* methods. * <p/> * This method is not thread safe. */ public List<String> getResourcesNotLoaded() { return Collections.unmodifiableList(resourcesNotLoaded); } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // // Find // // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * public URL find(String uri) throws IOException { String fullUri = path + uri; return getResource(fullUri); } public List<URL> findAll(String uri) throws IOException { String fullUri = path + uri; Enumeration<URL> resources = getResources(fullUri); List<URL> list = new ArrayList<URL>(); while (resources.hasMoreElements()) { URL url = resources.nextElement(); list.add(url); } return list; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // // Find String // // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * /** * Reads the contents of the URL as a {@link String}'s and returns it. * * @param uri * @return a stringified content of a resource * @throws IOException if a resource pointed out by the uri param could not be find * @see ClassLoader#getResource(String) */ public String findString(String uri) throws IOException { String fullUri = path + uri; URL resource = getResource(fullUri); if (resource == null) { throw new IOException("Could not find a resource in : " + fullUri); } return readContents(resource); } /** * Reads the contents of the found URLs as a list of {@link String}'s and returns them. * * @param uri * @return a list of the content of each resource URL found * @throws IOException if any of the found URLs are unable to be read. */ public List<String> findAllStrings(String uri) throws IOException { String fulluri = path + uri; List<String> strings = new ArrayList<String>(); Enumeration<URL> resources = getResources(fulluri); while (resources.hasMoreElements()) { URL url = resources.nextElement(); String string = readContents(url); strings.add(string); } return strings; } /** * Reads the contents of the found URLs as a Strings and returns them. * Individual URLs that cannot be read are skipped and added to the * list of 'resourcesNotLoaded' * * @param uri * @return a list of the content of each resource URL found * @throws IOException if classLoader.getResources throws an exception */ public List<String> findAvailableStrings(String uri) throws IOException { resourcesNotLoaded.clear(); String fulluri = path + uri; List<String> strings = new ArrayList<String>(); Enumeration<URL> resources = getResources(fulluri); while (resources.hasMoreElements()) { URL url = resources.nextElement(); try { String string = readContents(url); strings.add(string); } catch (IOException notAvailable) { resourcesNotLoaded.add(url.toExternalForm()); } } return strings; } /** * Reads the contents of all non-directory URLs immediately under the specified * location and returns them in a map keyed by the file name. * <p/> * Any URLs that cannot be read will cause an exception to be thrown. * <p/> * Example classpath: * <p/> * META-INF/serializables/one * META-INF/serializables/two * META-INF/serializables/three * META-INF/serializables/four/foo.txt * <p/> * ResourceFinder finder = new ResourceFinder("META-INF/"); * Map map = finder.mapAvailableStrings("serializables"); * map.contains("one"); // true * map.contains("two"); // true * map.contains("three"); // true * map.contains("four"); // false * * @param uri * @return a list of the content of each resource URL found * @throws IOException if any of the urls cannot be read */ public Map<String, String> mapAllStrings(String uri) throws IOException { Map<String, String> strings = new HashMap<String, String>(); Map<String, URL> resourcesMap = getResourcesMap(uri); for (Map.Entry<String, URL> entry : resourcesMap.entrySet()) { String name = entry.getKey(); URL url = entry.getValue(); String value = readContents(url); strings.