001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.core.serializer.support; 018 019import java.io.ByteArrayInputStream; 020 021import org.springframework.core.convert.converter.Converter; 022import org.springframework.core.serializer.DefaultDeserializer; 023import org.springframework.core.serializer.Deserializer; 024import org.springframework.util.Assert; 025 026/** 027 * A {@link Converter} that delegates to a 028 * {@link org.springframework.core.serializer.Deserializer} 029 * to convert data in a byte array to an object. 030 * 031 * @author Gary Russell 032 * @author Mark Fisher 033 * @author Juergen Hoeller 034 * @since 3.0.5 035 */ 036public class DeserializingConverter implements Converter<byte[], Object> { 037 038 private final Deserializer<Object> deserializer; 039 040 041 /** 042 * Create a {@code DeserializingConverter} with default {@link java.io.ObjectInputStream} 043 * configuration, using the "latest user-defined ClassLoader". 044 * @see DefaultDeserializer#DefaultDeserializer() 045 */ 046 public DeserializingConverter() { 047 this.deserializer = new DefaultDeserializer(); 048 } 049 050 /** 051 * Create a {@code DeserializingConverter} for using an {@link java.io.ObjectInputStream} 052 * with the given {@code ClassLoader}. 053 * @since 4.2.1 054 * @see DefaultDeserializer#DefaultDeserializer(ClassLoader) 055 */ 056 public DeserializingConverter(ClassLoader classLoader) { 057 this.deserializer = new DefaultDeserializer(classLoader); 058 } 059 060 /** 061 * Create a {@code DeserializingConverter} that delegates to the provided {@link Deserializer}. 062 */ 063 public DeserializingConverter(Deserializer<Object> deserializer) { 064 Assert.notNull(deserializer, "Deserializer must not be null"); 065 this.deserializer = deserializer; 066 } 067 068 069 @Override 070 public Object convert(byte[] source) { 071 ByteArrayInputStream byteStream = new ByteArrayInputStream(source); 072 try { 073 return this.deserializer.deserialize(byteStream); 074 } 075 catch (Throwable ex) { 076 throw new SerializationFailedException("Failed to deserialize payload. " + 077 "Is the byte array a result of corresponding serialization for " + 078 this.deserializer.getClass().getSimpleName() + "?", ex); 079 } 080 } 081 082}