DefaultHttpCacheEntrySerializer.java

/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package com.apigee.sdk.apm.http.impl.client.cache;

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;

import com.apigee.sdk.apm.http.annotation.Immutable;
import com.apigee.sdk.apm.http.client.cache.HttpCacheEntry;
import com.apigee.sdk.apm.http.client.cache.HttpCacheEntrySerializationException;
import com.apigee.sdk.apm.http.client.cache.HttpCacheEntrySerializer;

/**
 * {@link HttpCacheEntrySerializer} implementation that uses the default
 * (native) serialization.
 * 
 * @see java.io.Serializable
 * 
 * @since 4.1
 */
@Immutable
public class DefaultHttpCacheEntrySerializer implements
		HttpCacheEntrySerializer {

	public void writeTo(HttpCacheEntry cacheEntry, OutputStream os)
			throws IOException {
		ObjectOutputStream oos = new ObjectOutputStream(os);
		try {
			oos.writeObject(cacheEntry);
		} finally {
			oos.close();
		}
	}

	public HttpCacheEntry readFrom(InputStream is) throws IOException {
		ObjectInputStream ois = new ObjectInputStream(is);
		try {
			return (HttpCacheEntry) ois.readObject();
		} catch (ClassNotFoundException ex) {
			throw new HttpCacheEntrySerializationException("Class not found: "
					+ ex.getMessage(), ex);
		} finally {
			ois.close();
		}
	}

}