| /* |
| * 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.algebricks.runtime.operators.std; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.data.IBinaryBooleanInspector; |
| import edu.uci.ics.hyracks.algebricks.data.IBinaryBooleanInspectorFactory; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import edu.uci.ics.hyracks.algebricks.runtime.operators.base.AbstractOneInputOneOutputOneFramePushRuntime; |
| import edu.uci.ics.hyracks.algebricks.runtime.operators.base.AbstractOneInputOneOutputRuntimeFactory; |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.data.std.api.IPointable; |
| import edu.uci.ics.hyracks.data.std.primitive.VoidPointable; |
| |
| public class StreamSelectRuntimeFactory extends AbstractOneInputOneOutputRuntimeFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private IScalarEvaluatorFactory cond; |
| |
| private IBinaryBooleanInspectorFactory binaryBooleanInspectorFactory; |
| |
| /** |
| * @param cond |
| * @param projectionList |
| * if projectionList is null, then no projection is performed |
| */ |
| public StreamSelectRuntimeFactory(IScalarEvaluatorFactory cond, int[] projectionList, |
| IBinaryBooleanInspectorFactory binaryBooleanInspectorFactory) { |
| super(projectionList); |
| this.cond = cond; |
| this.binaryBooleanInspectorFactory = binaryBooleanInspectorFactory; |
| } |
| |
| @Override |
| public String toString() { |
| return "stream-select " + cond.toString(); |
| } |
| |
| @Override |
| public AbstractOneInputOneOutputOneFramePushRuntime createOneOutputPushRuntime(final IHyracksTaskContext ctx) { |
| final IBinaryBooleanInspector bbi = binaryBooleanInspectorFactory.createBinaryBooleanInspector(ctx); |
| return new AbstractOneInputOneOutputOneFramePushRuntime() { |
| private IPointable p = VoidPointable.FACTORY.createPointable(); |
| private IScalarEvaluator eval; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| if (eval == null) { |
| initAccessAppendRef(ctx); |
| try { |
| eval = cond.createScalarEvaluator(ctx); |
| } catch (AlgebricksException ae) { |
| throw new HyracksDataException(ae); |
| } |
| } |
| writer.open(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| tAccess.reset(buffer); |
| int nTuple = tAccess.getTupleCount(); |
| for (int t = 0; t < nTuple; t++) { |
| tRef.reset(tAccess, t); |
| try { |
| eval.evaluate(tRef, p); |
| } catch (AlgebricksException ae) { |
| throw new HyracksDataException(ae); |
| } |
| if (bbi.getBooleanValue(p.getByteArray(), p.getStartOffset(), p.getLength())) { |
| if (projectionList != null) { |
| appendProjectionToFrame(t, projectionList); |
| } else { |
| appendTupleToFrame(t); |
| } |
| } |
| } |
| } |
| |
| }; |
| } |
| |
| } |