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Liferay Portal Template FreeMarker
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 freemarker.ext.beans;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import freemarker.ext.util.ModelCache;
import freemarker.ext.util.ModelFactory;
import freemarker.template.TemplateModel;
public class BeansModelCache extends ModelCache {
private final Map, ModelFactory> classToFactory = new ConcurrentHashMap<>();
private final Set mappedClassNames = new HashSet<>();
private final BeansWrapper wrapper;
BeansModelCache(BeansWrapper wrapper) {
this.wrapper = wrapper;
}
@Override
protected boolean isCacheable(Object object) {
return object.getClass() != Boolean.class;
}
@Override
@SuppressFBWarnings(value="JLM_JSR166_UTILCONCURRENT_MONITORENTER", justification="Locks for factory creation only")
protected TemplateModel create(Object object) {
Class clazz = object.getClass();
ModelFactory factory = classToFactory.get(clazz);
if (factory == null) {
// Synchronized so that we won't unnecessarily create the same factory for multiple times in parallel.
synchronized (classToFactory) {
factory = classToFactory.get(clazz);
if (factory == null) {
String className = clazz.getName();
// clear mappings when class reloading is detected
if (!mappedClassNames.add(className)) {
classToFactory.clear();
mappedClassNames.clear();
mappedClassNames.add(className);
}
factory = wrapper.getModelFactory(clazz);
classToFactory.put(clazz, factory);
}
}
}
return factory.create(object, wrapper);
}
}
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