hadoop Serializer 源码
haddop Serializer 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/serializer/Serializer.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.
*/
package org.apache.hadoop.io.serializer;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* <p>
* Provides a facility for serializing objects of type <T> to an
* {@link OutputStream}.
* </p>
*
* <p>
* Serializers are stateful, but must not buffer the output since
* other producers may write to the output between calls to
* {@link #serialize(Object)}.
* </p>
* @param <T> generic type.
*/
@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
@InterfaceStability.Evolving
public interface Serializer<T> {
/**
* <p>Prepare the serializer for writing.</p>
* @param out output stream.
* @throws IOException raised on errors performing I/O.
*/
void open(OutputStream out) throws IOException;
/**
* <p>Serialize <code>t</code> to the underlying output stream.</p>
* @param t t.
* @throws IOException raised on errors performing I/O.
*/
void serialize(T t) throws IOException;
/**
* <p>Close the underlying output stream and clear up any resources.</p>
* @throws IOException raised on errors performing I/O.
*/
void close() throws IOException;
}
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