| /* |
| * 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.std; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IRunningAggregateEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IRunningAggregateEvaluatorFactory; |
| 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.comm.IFrameTupleAccessor; |
| 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 RunningAggregateRuntimeFactory extends AbstractOneInputOneOutputRuntimeFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private int[] outColumns; |
| private IRunningAggregateEvaluatorFactory[] runningAggregates; |
| |
| /** |
| * @param outColumns |
| * a sorted array of columns into which the result is written to |
| * @param runningAggregates |
| * @param projectionList |
| * an array of columns to be projected |
| */ |
| |
| public RunningAggregateRuntimeFactory(int[] outColumns, IRunningAggregateEvaluatorFactory[] runningAggregates, |
| int[] projectionList) { |
| super(projectionList); |
| this.outColumns = outColumns; |
| this.runningAggregates = runningAggregates; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("running-aggregate ["); |
| for (int i = 0; i < outColumns.length; i++) { |
| if (i > 0) { |
| sb.append(", "); |
| } |
| sb.append(outColumns[i]); |
| } |
| sb.append("] := ["); |
| for (int i = 0; i < runningAggregates.length; i++) { |
| if (i > 0) { |
| sb.append(", "); |
| } |
| sb.append(runningAggregates[i]); |
| } |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public AbstractOneInputOneOutputOneFramePushRuntime createOneOutputPushRuntime(final IHyracksTaskContext ctx) |
| throws AlgebricksException { |
| final int[] projectionToOutColumns = new int[projectionList.length]; |
| for (int j = 0; j < projectionList.length; j++) { |
| projectionToOutColumns[j] = Arrays.binarySearch(outColumns, projectionList[j]); |
| } |
| |
| return new AbstractOneInputOneOutputOneFramePushRuntime() { |
| private IPointable p = VoidPointable.FACTORY.createPointable(); |
| private IRunningAggregateEvaluator[] raggs = new IRunningAggregateEvaluator[runningAggregates.length]; |
| private ArrayTupleBuilder tupleBuilder = new ArrayTupleBuilder(projectionList.length); |
| private boolean first = true; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| initAccessAppendRef(ctx); |
| if (first) { |
| first = false; |
| int n = runningAggregates.length; |
| for (int i = 0; i < n; i++) { |
| try { |
| raggs[i] = runningAggregates[i].createRunningAggregateEvaluator(); |
| raggs[i].init(); |
| } 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); |
| produceTuple(tupleBuilder, tAccess, t, tRef); |
| appendToFrameFromTupleBuilder(tupleBuilder); |
| } |
| } |
| |
| private void produceTuple(ArrayTupleBuilder tb, IFrameTupleAccessor accessor, int tIndex, |
| FrameTupleReference tupleRef) throws HyracksDataException { |
| tb.reset(); |
| for (int f = 0; f < projectionList.length; f++) { |
| int k = projectionToOutColumns[f]; |
| if (k >= 0) { |
| try { |
| raggs[k].step(tupleRef, p); |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| tb.addField(p.getByteArray(), p.getStartOffset(), p.getLength()); |
| } else { |
| tb.addField(accessor, tIndex, projectionList[f]); |
| } |
| } |
| } |
| |
| }; |
| } |
| } |