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Apache License
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/** * Copyright 2006-2015 the original author or authors. */*from w w w . j ava2 s. com*/ * 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 org.objenesis.ObjenesisException; import org.objenesis.instantiator.ObjectInstantiator; import sun.misc.Unsafe; import java.lang.reflect.Field; /** * Instantiates an object, WITHOUT calling it's constructor, using * sun.misc.Unsafe.allocateInstance(). Unsafe and its methods are implemented by most * modern JVMs. * * @author Henri Tremblay * @see ObjectInstantiator */ @SuppressWarnings("restriction") public class UnsafeFactoryInstantiator<T> implements ObjectInstantiator<T> { private static Unsafe unsafe; private final Class<T> type; public UnsafeFactoryInstantiator(Class<T> type) { if (unsafe == null) { Field f; try { f = Unsafe.class.getDeclaredField("theUnsafe"); } catch (NoSuchFieldException e) { throw new ObjenesisException(e); } f.setAccessible(true); try { unsafe = (Unsafe) f.get(null); } catch (IllegalAccessException e) { throw new ObjenesisException(e); } } this.type = type; } public T newInstance() { try { return type.cast(unsafe.allocateInstance(type)); } catch (InstantiationException e) { throw new ObjenesisException(e); } } }