| /* |
| * 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.algebricks.runtime.operators.aggreg; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IAggregateEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory; |
| 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; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.ArrayTupleBuilder; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.FrameTupleReference; |
| |
| public class AggregateRuntimeFactory extends AbstractOneInputOneOutputRuntimeFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| // private int[] outColumns; |
| private IAggregateEvaluatorFactory[] aggregFactories; |
| |
| public AggregateRuntimeFactory(IAggregateEvaluatorFactory[] aggregFactories) { |
| super(null); |
| // this.outColumns = outColumns; |
| this.aggregFactories = aggregFactories; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("assign ["); |
| for (int i = 0; i < aggregFactories.length; i++) { |
| if (i > 0) { |
| sb.append(", "); |
| } |
| sb.append(aggregFactories[i]); |
| } |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public AbstractOneInputOneOutputOneFramePushRuntime createOneOutputPushRuntime(final IHyracksTaskContext ctx) |
| throws AlgebricksException { |
| return new AbstractOneInputOneOutputOneFramePushRuntime() { |
| |
| private IAggregateEvaluator[] aggregs = new IAggregateEvaluator[aggregFactories.length]; |
| private IPointable result = VoidPointable.FACTORY.createPointable(); |
| private ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(aggregs.length); |
| |
| private boolean first = true; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| try { |
| if (first) { |
| first = false; |
| initAccessAppendRef(ctx); |
| for (int i = 0; i < aggregFactories.length; i++) { |
| aggregs[i] = aggregFactories[i].createAggregateEvaluator(ctx); |
| } |
| } |
| for (int i = 0; i < aggregFactories.length; i++) { |
| aggregs[i].init(); |
| } |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| |
| 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); |
| processTuple(tRef); |
| } |
| |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| computeAggregate(); |
| appendToFrameFromTupleBuilder(tupleBuilder); |
| super.close(); |
| } |
| |
| private void computeAggregate() throws HyracksDataException { |
| tupleBuilder.reset(); |
| for (int f = 0; f < aggregs.length; f++) { |
| try { |
| aggregs[f].finish(result); |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| tupleBuilder.addField(result.getByteArray(), result.getStartOffset(), result.getLength()); |
| } |
| } |
| |
| private void processTuple(FrameTupleReference tupleRef) throws HyracksDataException { |
| for (int f = 0; f < aggregs.length; f++) { |
| try { |
| aggregs[f].step(tupleRef); |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| } |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| writer.fail(); |
| } |
| }; |
| } |
| } |