/*
* Copyright 2002-2010 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.tiles2;
import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import javax.servlet.ServletContext;
import org.apache.tiles.Initializable;
import org.apache.tiles.TilesApplicationContext;
import org.apache.tiles.context.AbstractTilesApplicationContextFactory;
import org.apache.tiles.servlet.context.ServletTilesApplicationContext;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.web.context.support.ServletContextResourcePatternResolver;
/**
* Spring-specific subclass of the standard Tiles AbstractTilesApplicationContextFactory,
* passing given properties through as Tiles init-param map.
*
* @author Juergen Hoeller
* @since 3.0
* @see TilesConfigurer#setTilesProperties
*/
public class SpringTilesApplicationContextFactory extends AbstractTilesApplicationContextFactory
implements Initializable {
private Map<String, String> params;
public void init(Map<String, String> params) {
this.params = params;
}
public TilesApplicationContext createApplicationContext(Object context) {
return new SpringWildcardServletTilesApplicationContext((ServletContext) context, this.params);
}
/**
* Custom subclass of the standard Tiles WildcardServletTilesApplicationContext,
* passing given properties through as Tiles init-param map.
*/
private static class SpringWildcardServletTilesApplicationContext extends ServletTilesApplicationContext {
private final Map<String, String> mergedInitParams;
private final ResourcePatternResolver resolver;
public SpringWildcardServletTilesApplicationContext(ServletContext servletContext, Map<String, String> params) {
super(servletContext);
this.mergedInitParams = new LinkedHashMap<String, String>();
Enumeration initParamNames = servletContext.getInitParameterNames();
while (initParamNames.hasMoreElements()) {
String initParamName = (String) initParamNames.nextElement();
this.mergedInitParams.put(initParamName, servletContext.getInitParameter(initParamName));
}
if (params != null) {
this.mergedInitParams.putAll(params);
}
this.resolver = new ServletContextResourcePatternResolver(servletContext);
}
@Override
public Map<String, String> getInitParams() {
return this.mergedInitParams;
}
@Override
public URL getResource(String path) throws IOException {
URL retValue = null;
Set<URL> urlSet = getResources(path);
if (urlSet != null && !urlSet.isEmpty()) {
retValue = urlSet.iterator().next();
}
return retValue;
}
@Override
public Set<URL> getResources(String path) throws IOException {
Set<URL> urlSet = null;
Resource[] resources = this.resolver.getResources(path);
if (resources != null && resources.length > 0) {
urlSet = new HashSet<URL>();
for (Resource resource : resources) {
urlSet.add(resource.getURL());
}
}
return urlSet;
}
}
}
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