| /* |
| * Copyright 2009-2013 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.misc; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender; |
| import edu.uci.ics.hyracks.dataflow.common.comm.util.FrameUtils; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryOutputSourceOperatorNodePushable; |
| |
| public class ConstantTupleSourceOperatorNodePushable extends AbstractUnaryOutputSourceOperatorNodePushable { |
| private IHyracksTaskContext ctx; |
| |
| private int[] fieldSlots; |
| private byte[] tupleData; |
| private int tupleSize; |
| |
| public ConstantTupleSourceOperatorNodePushable(IHyracksTaskContext ctx, int[] fieldSlots, byte[] tupleData, |
| int tupleSize) { |
| super(); |
| this.fieldSlots = fieldSlots; |
| this.tupleData = tupleData; |
| this.tupleSize = tupleSize; |
| this.ctx = ctx; |
| } |
| |
| @Override |
| public void initialize() throws HyracksDataException { |
| ByteBuffer writeBuffer = ctx.allocateFrame(); |
| FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize()); |
| appender.reset(writeBuffer, true); |
| if (fieldSlots != null && tupleData != null && tupleSize > 0) |
| appender.append(fieldSlots, tupleData, 0, tupleSize); |
| writer.open(); |
| try { |
| FrameUtils.flushFrame(writeBuffer, writer); |
| } catch (Exception e) { |
| writer.fail(); |
| throw new HyracksDataException(e); |
| } finally { |
| writer.close(); |
| } |
| } |
| } |