/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.resource;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import javax.faces.FacesException;
import org.richfaces.log.Logger;
import org.richfaces.log.RichfacesLogger;
import org.richfaces.util.FastJoiner;
import org.richfaces.util.PropertiesUtil;
import com.google.common.base.Function;
import com.google.common.base.Splitter;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.Iterables;
/**
* @author Nick Belaevski
*/
public class ResourceLibraryFactoryImpl implements ResourceLibraryFactory {
private static final Logger LOGGER = RichfacesLogger.RESOURCE.getLogger();
private static final FastJoiner SLASH_JOINER = FastJoiner.on('/');
private static final Splitter COMA_SPLITTER = Splitter.on(',').omitEmptyStrings().trimResults();
/*
* (non-Javadoc)
* @see org.richfaces.resource.ResourceLibraryFactory#getResourceLibrary(java.lang.String, java.lang.String)
*/
@Override
public ResourceLibrary getResourceLibrary(String name, String library) {
ResourceKey resourceKey = new ResourceKey(name, library);
try {
return instances.get(resourceKey);
} catch (ExecutionException e) {
throw new FacesException(String.format("Can't resolve resource library %s", resourceKey), e);
}
}
private LoadingCache<ResourceKey, ResourceLibrary> instances = CacheBuilder.newBuilder().build(CacheLoader.from(new Function<ResourceKey, ResourceLibrary>() {
public ResourceLibrary apply(ResourceKey from) {
String propsResourceName = from.getResourceName() + ".library.properties";
Map<String, String> props = PropertiesUtil.loadProperties("META-INF/richfaces/"
+ SLASH_JOINER.join(from.getLibraryName(), propsResourceName));
String libraryClass = props.get("class");
String resources = props.get("resources");
if (libraryClass != null) {
try {
Class<?> clazz = Class.forName(libraryClass.trim(), false, Thread.currentThread()
.getContextClassLoader());
return (ResourceLibrary) clazz.newInstance();
} catch (ClassNotFoundException e) {
LOGGER.error(e.getMessage(), e);
} catch (InstantiationException e) {
LOGGER.error(e.getMessage(), e);
} catch (IllegalAccessException e) {
LOGGER.error(e.getMessage(), e);
}
} else if (resources != null) {
Iterable<ResourceKey> keys = Iterables.transform(COMA_SPLITTER.split(resources), ResourceKey.FACTORY);
return new StaticResourceLibrary(Iterables.toArray(keys, ResourceKey.class));
} else {
LOGGER.error("'class' or 'resources' properties should be declared in library descriptor: " + from);
}
return null;
}
}));
}