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Apache License
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/** * Copyright 2006-2015 the original author or authors. *//w ww .j ava 2 s. c om * 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; /** * 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<T> implements ObjectInstantiator<T> { private final Constructor<T> mungedConstructor; public SunReflectionFactoryInstantiator(Class<T> type) { Constructor<Object> javaLangObjectConstructor = getJavaLangObjectConstructor(); mungedConstructor = SunReflectionFactoryHelper.newConstructorForSerialization( type, javaLangObjectConstructor); mungedConstructor.setAccessible(true); } public T newInstance() { try { return mungedConstructor.newInstance((Object[]) null); } catch(Exception e) { throw new ObjenesisException(e); } } private static Constructor<Object> getJavaLangObjectConstructor() { try { return Object.class.getConstructor((Class[]) null); } catch(NoSuchMethodException e) { throw new ObjenesisException(e); } } }