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Spring Framework example source code file (ResourcePatternUtils.java)

This example Spring Framework source code file (ResourcePatternUtils.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

pathmatchingresourcepatternresolver, pathmatchingresourcepatternresolver, resourceloader, resourceloader, resourcepatternresolver, resourcepatternresolver, resourcepatternutils, resourcepatternutils

The Spring Framework ResourcePatternUtils.java source code

/*
 * Copyright 2002-2007 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.support;

import org.springframework.core.io.ResourceLoader;
import org.springframework.util.Assert;
import org.springframework.util.ResourceUtils;

/**
 * Utility class for determining whether a given URL is a resource
 * location that can be loaded via a ResourcePatternResolver.
 *
 * <p>Callers will usually assume that a location is a relative path
 * if the {@link #isUrl(String)} method returns <code>false.
 *
 * @author Juergen Hoeller
 * @since 1.2.3
 */
public abstract class ResourcePatternUtils {

	/**
	 * Return whether the given resource location is a URL: either a
	 * special "classpath" or "classpath*" pseudo URL or a standard URL.
	 * @param resourceLocation the location String to check
	 * @return whether the location qualifies as a URL
	 * @see ResourcePatternResolver#CLASSPATH_ALL_URL_PREFIX
	 * @see org.springframework.util.ResourceUtils#CLASSPATH_URL_PREFIX
	 * @see org.springframework.util.ResourceUtils#isUrl(String)
	 * @see java.net.URL
	 */
	public static boolean isUrl(String resourceLocation) {
		return (resourceLocation != null &&
				(resourceLocation.startsWith(ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX) ||
						ResourceUtils.isUrl(resourceLocation)));
	}

	/**
	 * Return a default ResourcePatternResolver for the given ResourceLoader.
	 * <p>This might be the ResourceLoader itself, if it implements the
	 * ResourcePatternResolver extension, or a PathMatchingResourcePatternResolver
	 * built on the given ResourceLoader.
	 * @param resourceLoader the ResourceLoader to build a pattern resolver for
	 * (not <code>null)
	 * @return the ResourcePatternResolver
	 * @see PathMatchingResourcePatternResolver
	 */
	public static ResourcePatternResolver getResourcePatternResolver(ResourceLoader resourceLoader) {
		Assert.notNull(resourceLoader, "ResourceLoader must not be null");
		if (resourceLoader instanceof ResourcePatternResolver) {
			return (ResourcePatternResolver) resourceLoader;
		}
		else {
			return new PathMatchingResourcePatternResolver(resourceLoader);
		}
	}

}

Other Spring Framework examples (source code examples)

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