org.springframework.web.servlet.view.tiles3.SpringWildcardServletTilesApplicationContext Maven / Gradle / Ivy
/*
* Copyright 2002-2014 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.view.tiles3;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;
import javax.servlet.ServletContext;
import org.apache.tiles.request.ApplicationResource;
import org.apache.tiles.request.locale.URLApplicationResource;
import org.apache.tiles.request.servlet.ServletApplicationContext;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.web.context.support.ServletContextResourcePatternResolver;
/**
* Spring-specific subclass of the Tiles ServletApplicationContext.
*
* @author Rossen Stoyanchev
* @author Juergen Hoeller
* @since 3.2
*/
public class SpringWildcardServletTilesApplicationContext extends ServletApplicationContext {
private final ResourcePatternResolver resolver;
public SpringWildcardServletTilesApplicationContext(ServletContext servletContext) {
super(servletContext);
this.resolver = new ServletContextResourcePatternResolver(servletContext);
}
@Override
public ApplicationResource getResource(String localePath) {
Collection urlSet = getResources(localePath);
if (!CollectionUtils.isEmpty(urlSet)) {
return urlSet.iterator().next();
}
return null;
}
@Override
public ApplicationResource getResource(ApplicationResource base, Locale locale) {
Collection urlSet = getResources(base.getLocalePath(locale));
if (!CollectionUtils.isEmpty(urlSet)) {
return urlSet.iterator().next();
}
return null;
}
@Override
public Collection getResources(String path) {
Resource[] resources;
try {
resources = this.resolver.getResources(path);
}
catch (IOException ex) {
((ServletContext) getContext()).log("Resource retrieval failed for path: " + path, ex);
return Collections.emptyList();
}
if (ObjectUtils.isEmpty(resources)) {
((ServletContext) getContext()).log("No resources found for path pattern: " + path);
return Collections.emptyList();
}
Collection resourceList = new ArrayList(resources.length);
for (Resource resource : resources) {
try {
URL url = resource.getURL();
resourceList.add(new URLApplicationResource(url.toExternalForm(), url));
}
catch (IOException ex) {
// Shouldn't happen with the kind of resources we're using
throw new IllegalArgumentException("No URL for " + resource, ex);
}
}
return resourceList;
}
}