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DefaultResourceLoader.java
Upload User: jiancairen
Upload Date: 2007-08-27
Package Size: 26458k
Code Size: 3k
Category:
Java Develop
Development Platform:
Java
- /*
- * Copyright 2002-2004 the original author or authors.
- *
- * 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.springframework.core.io;
- import java.net.MalformedURLException;
- import java.net.URL;
- /**
- * Default implementation of the ResourceLoader interface.
- * Used by ResourceEditor, but also suitable for standalone usage.
- *
- * <p>Will return an UrlResource if the location value is a URL, and a
- * ClassPathResource if it is a non-URL path or a "classpath:" pseudo-URL.
- *
- * @author Juergen Hoeller
- * @since 10.03.2004
- * @see #CLASSPATH_URL_PREFIX
- * @see ResourceEditor
- * @see UrlResource
- * @see ClassPathResource
- */
- public class DefaultResourceLoader implements ResourceLoader {
- private final ClassLoader classLoader;
- /**
- * Create a new DefaultResourceLoader.
- * <p>ClassLoader access will happen via the thread context class loader on actual
- * access (applying to the thread that does ClassPathResource calls).
- */
- public DefaultResourceLoader() {
- this(null);
- }
- /**
- * Create a new DefaultResourceLoader.
- * @param classLoader the ClassLoader to load classpath resources with,
- * or null if using the thread context class loader on actual access
- * (applying to the thread that does ClassPathResource calls)
- */
- public DefaultResourceLoader(ClassLoader classLoader) {
- this.classLoader = classLoader;
- }
- /**
- * Return the ClassLoader to load classpath resources with,
- * or null if using the thread context class loader on actual access
- * (applying to the thread that does ClassPathResource calls).
- * <p>Will get passed to ClassPathResource's constructor for all
- * ClassPathResource objects created by this resource loader.
- * @see ClassPathResource
- */
- public ClassLoader getClassLoader() {
- return classLoader;
- }
- public Resource getResource(String location) {
- if (location.startsWith(CLASSPATH_URL_PREFIX)) {
- return new ClassPathResource(location.substring(CLASSPATH_URL_PREFIX.length()), getClassLoader());
- }
- else {
- try {
- // try URL
- URL url = new URL(location);
- return new UrlResource(url);
- }
- catch (MalformedURLException ex) {
- // no URL -> resolve resource path
- return getResourceByPath(location);
- }
- }
- }
- /**
- * Return a Resource handle for the resource at the given path.
- * <p>Default implementation supports class path locations. This should
- * be appropriate for standalone implementations but can be overridden,
- * e.g. for implementations targeted at a Servlet container.
- * @param path path to the resource
- * @return Resource handle
- * @see ClassPathResource
- * @see org.springframework.context.support.FileSystemXmlApplicationContext#getResourceByPath
- * @see org.springframework.web.context.support.XmlWebApplicationContext#getResourceByPath
- */
- protected Resource getResourceByPath(String path) {
- return new ClassPathResource(path, getClassLoader());
- }
- }