| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.hyracks.dataflow.common.comm.io; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.IOpenableDataWriter; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| |
| public class FrameDeserializingDataWriter implements IFrameWriter { |
| private final IOpenableDataWriter<Object[]> writer; |
| private final FrameDeserializer frameDeserializer; |
| |
| public FrameDeserializingDataWriter(IHyracksTaskContext ctx, IOpenableDataWriter<Object[]> writer, |
| RecordDescriptor recordDescriptor) { |
| this.writer = writer; |
| this.frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), recordDescriptor); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| writer.close(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| frameDeserializer.reset(buffer); |
| while (!frameDeserializer.done()) { |
| Object[] tuple = frameDeserializer.deserializeRecord(); |
| writer.writeData(tuple); |
| } |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| writer.open(); |
| } |
| |
| @Override |
| public void fail() { |
| } |
| } |