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MessageConverter.java
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MessageConverter.java
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/**
* 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.hbase.ipc;
import com.google.protobuf.Message;
import java.io.IOException;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* Interface to convert Messages to specific types
* @param <M> Message Type to convert
* @param <O> Output Type
*/
@InterfaceAudience.Private
public interface MessageConverter<M,O> {
/**
* Converts Message to Output
* @param msg to convert
* @param cellScanner to use for conversion
* @return Output
* @throws IOException if message could not be converted to response
*/
O convert(M msg, CellScanner cellScanner) throws IOException;
MessageConverter<Message,Message> NO_CONVERTER = new MessageConverter<Message, Message>() {
@Override
public Message convert(Message msg, CellScanner cellScanner) throws IOException {
return msg;
}
};
}