/**
* 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.types;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import org.apache.hadoop.hbase.protobuf.generated.CellProtos;
import org.apache.hadoop.hbase.util.PositionedByteRange;
import java.io.IOException;
/**
* An example for using protobuf objects with {@link DataType} API.
*/
public class PBCell extends PBType<CellProtos.Cell> {
@Override
public Class<CellProtos.Cell> encodedClass() {
return CellProtos.Cell.class;
}
@Override
public int skip(PositionedByteRange src) {
CellProtos.Cell.Builder builder = CellProtos.Cell.newBuilder();
CodedInputStream is = inputStreamFromByteRange(src);
try {
builder.mergeFrom(is);
int consumed = is.getTotalBytesRead();
src.setPosition(src.getPosition() + consumed);
return consumed;
} catch (IOException e) {
throw new RuntimeException("Error while skipping type.", e);
}
}
@Override
public CellProtos.Cell decode(PositionedByteRange src) {
CellProtos.Cell.Builder builder = CellProtos.Cell.newBuilder();
CodedInputStream is = inputStreamFromByteRange(src);
try {
CellProtos.Cell ret = builder.mergeFrom(is).build();
src.setPosition(src.getPosition() + is.getTotalBytesRead());
return ret;
} catch (IOException e) {
throw new RuntimeException("Error while decoding type.", e);
}
}
@Override
public int encode(PositionedByteRange dst, CellProtos.Cell val) {
CodedOutputStream os = outputStreamFromByteRange(dst);
try {
int before = os.spaceLeft(), after, written;
val.writeTo(os);
after = os.spaceLeft();
written = before - after;
dst.setPosition(dst.getPosition() + written);
return written;
} catch (IOException e) {
throw new RuntimeException("Error while encoding type.", e);
}
}
}