/*
* Copyright (c) 2011-2014 Jeppetto and Jonathan Thompson
*
* 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.iternine.jeppetto.dao.mongodb.enhance;
import org.iternine.jeppetto.dao.EntityVelocityEnhancer;
import org.iternine.jeppetto.dao.updateobject.UpdateObjectVelocityEnhancer;
import org.iternine.jeppetto.enhance.Enhancer;
import org.iternine.jeppetto.enhance.NoOpEnhancer;
import java.util.HashMap;
import java.util.Map;
public class EnhancerHelper {
//-------------------------------------------------------------
// Variables - Private
//-------------------------------------------------------------
private static final Map<Class, Enhancer> dirtyableDBObjectEnhancers = new HashMap<Class, Enhancer>();
private static final Map<Class, Enhancer> updateObjectEnhancers = new HashMap<Class, Enhancer>();
//-------------------------------------------------------------
// Methods - Public - Static
//-------------------------------------------------------------
/**
* Creates a new dirtyableDBObject Enhancer for the given class. If the class already implements
* {@link DirtyableDBObject}, then a special "no-op" enhancer will be returned that
* doesn't do any special enhancement. Otherwise, a byte-code enhancer is returned.
*
* @param baseClass class for which to create an enhancer
*
* @return new enhancer
*/
@SuppressWarnings( { "unchecked" })
public static <T> Enhancer<T> getDirtyableDBObjectEnhancer(Class<T> baseClass) {
if (dirtyableDBObjectEnhancers.containsKey(baseClass)) {
return (Enhancer<T>) dirtyableDBObjectEnhancers.get(baseClass);
}
synchronized (dirtyableDBObjectEnhancers) {
Enhancer<T> enhancer;
if (dirtyableDBObjectEnhancers.get(baseClass) != null) {
enhancer = (Enhancer<T>) dirtyableDBObjectEnhancers.get(baseClass);
} else if (DirtyableDBObject.class.isAssignableFrom(baseClass)) {
enhancer = new NoOpEnhancer<T>(baseClass);
dirtyableDBObjectEnhancers.put(baseClass, enhancer);
} else {
enhancer = new EntityVelocityEnhancer<T>(baseClass) {
//-------------------------------------------------------------
// Implementation - Enhancer
//-------------------------------------------------------------
@Override
public boolean needsEnhancement(Object object) {
return object != null && !(object instanceof DirtyableDBObject);
}
//-------------------------------------------------------------
// Implementation - VelocityEnhancer
//-------------------------------------------------------------
@Override
protected String getTemplateLocation() {
return "org/iternine/jeppetto/dao/mongodb/enhance/dirtyableDBObject.vm";
}
};
dirtyableDBObjectEnhancers.put(baseClass, enhancer);
}
return enhancer;
}
}
/**
* Creates a new dirtyableDBObject Enhancer for the given class. If the class already implements
* {@link DirtyableDBObject}, then a special "no-op" enhancer will be returned that
* doesn't do any special enhancement. Otherwise, a byte-code enhancer is returned.
*
* @param baseClass class for which to create an enhancer
*
* @return new enhancer
*/
@SuppressWarnings( { "unchecked" })
public static <T> Enhancer<T> getUpdateObjectEnhancer(Class<T> baseClass) {
if (updateObjectEnhancers.containsKey(baseClass)) {
return (Enhancer<T>) updateObjectEnhancers.get(baseClass);
}
synchronized (updateObjectEnhancers) {
Enhancer<T> enhancer;
if (updateObjectEnhancers.get(baseClass) != null) {
enhancer = (Enhancer<T>) updateObjectEnhancers.get(baseClass);
} else if (UpdateObject.class.isAssignableFrom(baseClass)) {
enhancer = new NoOpEnhancer<T>(baseClass);
updateObjectEnhancers.put(baseClass, enhancer);
} else {
enhancer = new UpdateObjectVelocityEnhancer<T>(baseClass) {
//-------------------------------------------------------------
// Implementation - Enhancer
//-------------------------------------------------------------
@Override
public boolean needsEnhancement(Object object) {
return object != null && !(object instanceof UpdateObject);
}
//-------------------------------------------------------------
// Implementation - VelocityEnhancer
//-------------------------------------------------------------
@Override
protected String getTemplateLocation() {
return "org/iternine/jeppetto/dao/mongodb/enhance/updateObject.vm";
}
@Override
protected Map<String, Object> getAdditionalContextItems() {
Map<String, Object> contextItems = super.getAdditionalContextItems();
contextItems.put("updateObjectHelper", new UpdateObjectHelper());
return contextItems;
}
};
updateObjectEnhancers.put(baseClass, enhancer);
}
return enhancer;
}
}
}