/**
* Copyright 2006-2009 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.objenesis.instantiator.sun;
import java.io.NotSerializableException;
import java.lang.reflect.Constructor;
import org.objenesis.ObjenesisException;
import org.objenesis.instantiator.ObjectInstantiator;
import org.objenesis.instantiator.SerializationInstantiatorHelper;
import sun.reflect.ReflectionFactory;
/**
* Instantiates an object using internal sun.reflect.ReflectionFactory - a class only available on
* JDK's that use Sun's 1.4 (or later) Java implementation. This instantiator will create classes in
* a way compatible with serialization, calling the first non-serializable superclass' no-arg
* constructor. This is the best way to instantiate an object without any side effects caused by the
* constructor - however it is not available on every platform.
*
* @author Leonardo Mesquita
* @see ObjectInstantiator
*/
public class SunReflectionFactorySerializationInstantiator implements ObjectInstantiator {
private final Constructor mungedConstructor;
public SunReflectionFactorySerializationInstantiator(Class type) {
Class nonSerializableAncestor = SerializationInstantiatorHelper.getNonSerializableSuperClass(type);
ReflectionFactory reflectionFactory = ReflectionFactory.getReflectionFactory();
Constructor nonSerializableAncestorConstructor;
try {
nonSerializableAncestorConstructor = nonSerializableAncestor
.getConstructor((Class[]) null);
}
catch(NoSuchMethodException e) {
/**
* @todo (Henri) I think we should throw a NotSerializableException just to put the same
* message a ObjectInputStream. Otherwise, the user won't know if the null returned
* if a "Not serializable", a "No default constructor on ancestor" or a "Exception in
* constructor"
*/
throw new ObjenesisException(new NotSerializableException(type+" has no suitable superclass constructor"));
}
mungedConstructor = reflectionFactory.newConstructorForSerialization(type,
nonSerializableAncestorConstructor);
mungedConstructor.setAccessible(true);
}
public Object newInstance() {
try {
return mungedConstructor.newInstance((Object[]) null);
}
catch(Exception e) {
throw new ObjenesisException(e);
}
}
}