| /* |
| * 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.std.util; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.context.IHyracksStageletContext; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameDeserializer; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.SerializingDataWriter; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputOperatorNodePushable; |
| import edu.uci.ics.hyracks.dataflow.std.base.IOpenableDataWriterOperator; |
| |
| public final class DeserializedOperatorNodePushable extends AbstractUnaryInputOperatorNodePushable { |
| private final IHyracksStageletContext ctx; |
| |
| private final IOpenableDataWriterOperator delegate; |
| |
| private final FrameDeserializer deserializer; |
| |
| public DeserializedOperatorNodePushable(IHyracksStageletContext ctx, IOpenableDataWriterOperator delegate, |
| RecordDescriptor inRecordDesc) { |
| this.ctx = ctx; |
| this.delegate = delegate; |
| deserializer = inRecordDesc == null ? null : new FrameDeserializer(ctx.getFrameSize(), inRecordDesc); |
| } |
| |
| @Override |
| public void setOutputFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) { |
| delegate.setDataWriter(index, new SerializingDataWriter(ctx, recordDesc, writer)); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| delegate.close(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| deserializer.reset(buffer); |
| while (!deserializer.done()) { |
| delegate.writeData(deserializer.deserializeRecord()); |
| } |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| delegate.open(); |
| } |
| |
| @Override |
| public void flush() throws HyracksDataException { |
| } |
| |
| @Override |
| public String getDisplayName() { |
| return "Deserialized(" + delegate + ")"; |
| } |
| } |