| /* |
| * 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 freemarker.ext.util.ModelCache; |
| import freemarker.ext.util.ModelFactory; |
| import freemarker.template.TemplateModel; |
| |
| public class BeansModelCache extends ModelCache { |
| private final Map<Class<?>, ModelFactory> classToFactory = new ConcurrentHashMap<>(); |
| private final Set<String> 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); |
| } |
| } |