001/* 002 * Copyright 2002-2019 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.util; 018 019import java.io.ByteArrayInputStream; 020import java.io.ByteArrayOutputStream; 021import java.io.IOException; 022import java.io.ObjectInputStream; 023import java.io.ObjectOutputStream; 024 025import org.springframework.lang.Nullable; 026 027/** 028 * Static utilities for serialization and deserialization. 029 * 030 * @author Dave Syer 031 * @since 3.0.5 032 */ 033public abstract class SerializationUtils { 034 035 /** 036 * Serialize the given object to a byte array. 037 * @param object the object to serialize 038 * @return an array of bytes representing the object in a portable fashion 039 */ 040 @Nullable 041 public static byte[] serialize(@Nullable Object object) { 042 if (object == null) { 043 return null; 044 } 045 ByteArrayOutputStream baos = new ByteArrayOutputStream(1024); 046 try (ObjectOutputStream oos = new ObjectOutputStream(baos)) { 047 oos.writeObject(object); 048 oos.flush(); 049 } 050 catch (IOException ex) { 051 throw new IllegalArgumentException("Failed to serialize object of type: " + object.getClass(), ex); 052 } 053 return baos.toByteArray(); 054 } 055 056 /** 057 * Deserialize the byte array into an object. 058 * @param bytes a serialized object 059 * @return the result of deserializing the bytes 060 */ 061 @Nullable 062 public static Object deserialize(@Nullable byte[] bytes) { 063 if (bytes == null) { 064 return null; 065 } 066 try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes))) { 067 return ois.readObject(); 068 } 069 catch (IOException ex) { 070 throw new IllegalArgumentException("Failed to deserialize object", ex); 071 } 072 catch (ClassNotFoundException ex) { 073 throw new IllegalStateException("Failed to deserialize object type", ex); 074 } 075 } 076 077}