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;
018
019import java.io.IOException;
020import java.io.InputStream;
021import java.io.ObjectInputStream;
022
023import org.springframework.core.ConfigurableObjectInputStream;
024import org.springframework.core.NestedIOException;
025
026/**
027 * A default {@link Deserializer} implementation that reads an input stream
028 * using Java serialization.
029 *
030 * @author Gary Russell
031 * @author Mark Fisher
032 * @author Juergen Hoeller
033 * @since 3.0.5
034 * @see ObjectInputStream
035 */
036public class DefaultDeserializer implements Deserializer<Object> {
037
038        private final ClassLoader classLoader;
039
040
041        /**
042         * Create a {@code DefaultDeserializer} with default {@link ObjectInputStream}
043         * configuration, using the "latest user-defined ClassLoader".
044         */
045        public DefaultDeserializer() {
046                this.classLoader = null;
047        }
048
049        /**
050         * Create a {@code DefaultDeserializer} for using an {@link ObjectInputStream}
051         * with the given {@code ClassLoader}.
052         * @since 4.2.1
053         * @see ConfigurableObjectInputStream#ConfigurableObjectInputStream(InputStream, ClassLoader)
054         */
055        public DefaultDeserializer(ClassLoader classLoader) {
056                this.classLoader = classLoader;
057        }
058
059
060        /**
061         * Read from the supplied {@code InputStream} and deserialize the contents
062         * into an object.
063         * @see ObjectInputStream#readObject()
064         */
065        @Override
066        @SuppressWarnings("resource")
067        public Object deserialize(InputStream inputStream) throws IOException {
068                ObjectInputStream objectInputStream = new ConfigurableObjectInputStream(inputStream, this.classLoader);
069                try {
070                        return objectInputStream.readObject();
071                }
072                catch (ClassNotFoundException ex) {
073                        throw new NestedIOException("Failed to deserialize object type", ex);
074                }
075        }
076
077}