1 /** 2 * Copyright 2006-2017 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.objenesis.instantiator.android; 17 18 import java.io.ObjectStreamClass; 19 import java.lang.reflect.InvocationTargetException; 20 import java.lang.reflect.Method; 21 22 import org.objenesis.ObjenesisException; 23 import org.objenesis.instantiator.ObjectInstantiator; 24 import org.objenesis.instantiator.annotations.Instantiator; 25 import org.objenesis.instantiator.annotations.Typology; 26 27 /** 28 * {@link ObjectInstantiator} for Android which creates objects using the constructor from the first 29 * non-serializable parent class constructor, using internal methods on the Dalvik implementation of 30 * {@link ObjectStreamClass}. 31 * 32 * @author Ian Parkinson (Google Inc.) 33 */ 34 @Instantiator(Typology.SERIALIZATION) 35 public class AndroidSerializationInstantiator<T> implements ObjectInstantiator<T> { 36 private final Class<T> type; 37 private final ObjectStreamClass objectStreamClass; 38 private final Method newInstanceMethod; 39 AndroidSerializationInstantiator(Class<T> type)40 public AndroidSerializationInstantiator(Class<T> type) { 41 this.type = type; 42 newInstanceMethod = getNewInstanceMethod(); 43 Method m = null; 44 try { 45 m = ObjectStreamClass.class.getMethod("lookupAny", Class.class); 46 } catch (NoSuchMethodException e) { 47 throw new ObjenesisException(e); 48 } 49 try { 50 objectStreamClass = (ObjectStreamClass) m.invoke(null, type); 51 } catch (IllegalAccessException e) { 52 throw new ObjenesisException(e); 53 } catch (InvocationTargetException e) { 54 throw new ObjenesisException(e); 55 } 56 } 57 newInstance()58 public T newInstance() { 59 try { 60 return type.cast(newInstanceMethod.invoke(objectStreamClass, type)); 61 } 62 catch(IllegalAccessException e) { 63 throw new ObjenesisException(e); 64 } 65 catch(IllegalArgumentException e) { 66 throw new ObjenesisException(e); 67 } 68 catch(InvocationTargetException e) { 69 throw new ObjenesisException(e); 70 } 71 } 72 getNewInstanceMethod()73 private static Method getNewInstanceMethod() { 74 try { 75 Method newInstanceMethod = ObjectStreamClass.class.getDeclaredMethod( 76 "newInstance", Class.class); 77 newInstanceMethod.setAccessible(true); 78 return newInstanceMethod; 79 } 80 catch(RuntimeException e) { 81 throw new ObjenesisException(e); 82 } 83 catch(NoSuchMethodException e) { 84 throw new ObjenesisException(e); 85 } 86 } 87 } 88