/*
* Copyright 2002-2015 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.web.servlet.resource;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.io.Resource;
/**
* Base class for {@link org.springframework.web.servlet.resource.ResourceResolver}
* implementations. Provides consistent logging.
*
* @author Rossen Stoyanchev
* @since 4.1
*/
public abstract class AbstractResourceResolver implements ResourceResolver {
protected final Log logger = LogFactory.getLog(getClass());
@Override
public Resource resolveResource(HttpServletRequest request, String requestPath,
List<? extends Resource> locations, ResourceResolverChain chain) {
if (logger.isTraceEnabled()) {
logger.trace("Resolving resource for request path \"" + requestPath + "\"");
}
return resolveResourceInternal(request, requestPath, locations, chain);
}
@Override
public String resolveUrlPath(String resourceUrlPath, List<? extends Resource> locations,
ResourceResolverChain chain) {
if (logger.isTraceEnabled()) {
logger.trace("Resolving public URL for resource path \"" + resourceUrlPath + "\"");
}
return resolveUrlPathInternal(resourceUrlPath, locations, chain);
}
protected abstract Resource resolveResourceInternal(HttpServletRequest request, String requestPath,
List<? extends Resource> locations, ResourceResolverChain chain);
protected abstract String resolveUrlPathInternal(String resourceUrlPath,
List<? extends Resource> locations, ResourceResolverChain chain);
}