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/* * Copyright 2002-2012 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 * * https://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 org.springframework.util.Assert; import org.springframework.util.StringUtils; /** * {@link ResourceLoader} implementation that interprets plain resource paths * as relative to a given {@code java.lang.Class}. * * @author Juergen Hoeller * @since 3.0 * @see Class#getResource(String) * @see ClassPathResource#ClassPathResource(String, Class) */ public class ClassRelativeResourceLoader extends DefaultResourceLoader { private final Class<?> clazz; /** * Create a new ClassRelativeResourceLoader for the given class. * @param clazz the class to load resources through */ public ClassRelativeResourceLoader(Class<?> clazz) { Assert.notNull(clazz, "Class must not be null"); this.clazz = clazz; setClassLoader(clazz.getClassLoader()); } @Override protected Resource getResourceByPath(String path) { return new ClassRelativeContextResource(path, this.clazz); } /** * ClassPathResource that explicitly expresses a context-relative path * through implementing the ContextResource interface. */ private static class ClassRelativeContextResource extends ClassPathResource implements ContextResource { private final Class<?> clazz; public ClassRelativeContextResource(String path, Class<?> clazz) { super(path, clazz); this.clazz = clazz; } @Override public String getPathWithinContext() { return getPath(); } @Override public Resource createRelative(String relativePath) { String pathToUse = StringUtils.applyRelativePath(getPath(), relativePath); return new ClassRelativeContextResource(pathToUse, this.clazz); } } }