/**
* 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.lang.reflect.Constructor;
import org.objenesis.ObjenesisException;
import org.objenesis.instantiator.ObjectInstantiator;
import sun.reflect.ReflectionFactory;
/**
* Instantiates an object, WITHOUT calling it's constructor, using internal
* sun.reflect.ReflectionFactory - a class only available on JDK's that use Sun's 1.4 (or later)
* Java implementation. 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 Joe Walnes
* @see ObjectInstantiator
*/
public class SunReflectionFactoryInstantiator implements ObjectInstantiator {
private final Constructor mungedConstructor;
public SunReflectionFactoryInstantiator(Class type) {
ReflectionFactory reflectionFactory = ReflectionFactory.getReflectionFactory();
Constructor javaLangObjectConstructor;
try {
javaLangObjectConstructor = Object.class.getConstructor((Class[]) null);
}
catch(NoSuchMethodException e) {
throw new Error("Cannot find constructor for java.lang.Object!");
}
mungedConstructor = reflectionFactory.newConstructorForSerialization(type,
javaLangObjectConstructor);
mungedConstructor.setAccessible(true);
}
public Object newInstance() {
try {
return mungedConstructor.newInstance((Object[]) null);
}
catch(Exception e) {
throw new ObjenesisException(e);
}
}
}