hadoop KeyConverter 源码
haddop KeyConverter 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-common/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/common/KeyConverter.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.yarn.server.timelineservice.storage.common;
/**
* Interface which has to be implemented for encoding and decoding row keys and
* columns.
*/
public interface KeyConverter<T> {
/**
* Encodes a key as a byte array.
*
* @param key key to be encoded.
* @return a byte array.
*/
byte[] encode(T key);
/**
* Decodes a byte array and returns a key of type T.
*
* @param bytes byte representation
* @return an object(key) of type T which has been constructed after decoding
* the bytes.
*/
T decode(byte[] bytes);
}
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