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SimpleHibernateProxyHandler.java
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SimpleHibernateProxyHandler.java
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/*
* Copyright 2004-2008 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.grails.orm.hibernate.proxy;
import groovy.lang.GroovyObject;
import groovy.lang.GroovySystem;
import org.grails.datastore.mapping.core.Session;
import org.grails.datastore.mapping.engine.AssociationQueryExecutor;
import org.grails.datastore.mapping.proxy.JavassistProxyFactory;
import org.grails.datastore.mapping.proxy.ProxyFactory;
import org.grails.datastore.mapping.proxy.ProxyHandler;
import org.grails.datastore.mapping.reflect.ClassPropertyFetcher;
import org.hibernate.Hibernate;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.HibernateProxyHelper;
import org.hibernate.proxy.LazyInitializer;
import java.io.Serializable;
/**
* Implementation of the ProxyHandler interface for Hibernate.
* Deprecated as Hibernate 5.6+ no longer supports Javassist
*
* @author Graeme Rocher
* @since 1.2.2
* @deprecated
*/
public class SimpleHibernateProxyHandler extends JavassistProxyFactory implements ProxyHandler, ProxyFactory {
public boolean isInitialized(Object o) {
if (o instanceof HibernateProxy) {
return !((HibernateProxy) o).getHibernateLazyInitializer().isUninitialized();
}
else if (o instanceof PersistentCollection) {
return ((PersistentCollection) o).wasInitialized();
}
else {
return super.isInitialized(o);
}
}
public boolean isInitialized(Object obj, String associationName) {
try {
Object proxy = ClassPropertyFetcher.getInstancePropertyValue(obj, associationName);
return isInitialized(proxy);
}
catch (RuntimeException e) {
return false;
}
}
@Override
public Object unwrap(Object object) {
return unwrapIfProxy(object);
}
@Override
public Serializable getIdentifier(Object obj) {
return (Serializable) getProxyIdentifier(obj);
}
public Object unwrapIfProxy(Object instance) {
if (instance instanceof HibernateProxy) {
final HibernateProxy proxy = (HibernateProxy)instance;
return unwrapProxy(proxy);
}
else {
return super.unwrap(instance);
}
}
public Object unwrapProxy(final HibernateProxy proxy) {
final LazyInitializer lazyInitializer = proxy.getHibernateLazyInitializer();
if (lazyInitializer.isUninitialized()) {
lazyInitializer.initialize();
}
final Object obj = lazyInitializer.getImplementation();
if (obj != null) {
ensureCorrectGroovyMetaClass(obj, obj.getClass());
}
return obj;
}
/**
* Ensures the meta class is correct for a given class
*
* @param target The GroovyObject
* @param persistentClass The persistent class
*/
private static void ensureCorrectGroovyMetaClass(Object target, Class<?> persistentClass) {
if (target instanceof GroovyObject) {
GroovyObject go = ((GroovyObject)target);
if (!go.getMetaClass().getTheClass().equals(persistentClass)) {
go.setMetaClass(GroovySystem.getMetaClassRegistry().getMetaClass(persistentClass));
}
}
}
public HibernateProxy getAssociationProxy(Object obj, String associationName) {
try {
Object proxy = ClassPropertyFetcher.getInstancePropertyValue(obj, associationName);
if (proxy instanceof HibernateProxy) {
return (HibernateProxy) proxy;
}
return null;
}
catch (RuntimeException e) {
return null;
}
}
public boolean isProxy(Object o) {
return (o instanceof HibernateProxy) || super.isProxy(o);
}
public void initialize(Object o) {
if (o instanceof HibernateProxy) {
final LazyInitializer hibernateLazyInitializer = ((HibernateProxy)o).getHibernateLazyInitializer();
if (hibernateLazyInitializer.isUninitialized()) {
hibernateLazyInitializer.initialize();
}
}
else {
super.initialize(o);
}
}
public Object getProxyIdentifier(Object o) {
if (o instanceof HibernateProxy) {
return ((HibernateProxy)o).getHibernateLazyInitializer().getIdentifier();
}
return super.getIdentifier(o);
}
public Class<?> getProxiedClass(Object o) {
if(o instanceof HibernateProxy) {
return HibernateProxyHelper.getClassWithoutInitializingProxy(o);
}
else {
return super.getProxiedClass(o);
}
}
@Override
public <T> T createProxy(Session session, Class<T> type, Serializable key) {
return super.createProxy(session, type, key);
}
@Override
public <T, K extends Serializable> T createProxy(Session session, AssociationQueryExecutor<K, T> executor, K associationKey) {
return super.createProxy(session, executor, associationKey);
}
}