| /* |
| * 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.group; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable; |
| import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator; |
| import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory; |
| import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAccessor; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputUnaryOutputOperatorNodePushable; |
| |
| public class PreclusteredGroupOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor { |
| private final int[] groupFields; |
| private final IBinaryComparatorFactory[] comparatorFactories; |
| private final IAggregatorDescriptorFactory aggregatorFactory; |
| |
| private static final long serialVersionUID = 1L; |
| |
| public PreclusteredGroupOperatorDescriptor(JobSpecification spec, int[] groupFields, |
| IBinaryComparatorFactory[] comparatorFactories, IAggregatorDescriptorFactory aggregatorFactory, |
| RecordDescriptor recordDescriptor) { |
| super(spec, 1, 1); |
| this.groupFields = groupFields; |
| this.comparatorFactories = comparatorFactories; |
| this.aggregatorFactory = aggregatorFactory; |
| recordDescriptors[0] = recordDescriptor; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException { |
| final IBinaryComparator[] comparators = new IBinaryComparator[comparatorFactories.length]; |
| for (int i = 0; i < comparatorFactories.length; ++i) { |
| comparators[i] = comparatorFactories[i].createBinaryComparator(); |
| } |
| final RecordDescriptor inRecordDesc = recordDescProvider.getInputRecordDescriptor(getOperatorId(), 0); |
| final IAggregatorDescriptor aggregator = aggregatorFactory.createAggregator(ctx, inRecordDesc, |
| recordDescriptors[0], groupFields, groupFields); |
| final ByteBuffer copyFrame = ctx.allocateFrame(); |
| final FrameTupleAccessor copyFrameAccessor = new FrameTupleAccessor(ctx.getFrameSize(), inRecordDesc); |
| copyFrameAccessor.reset(copyFrame); |
| ByteBuffer outFrame = ctx.allocateFrame(); |
| final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize()); |
| appender.reset(outFrame, true); |
| return new AbstractUnaryInputUnaryOutputOperatorNodePushable() { |
| private PreclusteredGroupWriter pgw; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| pgw = new PreclusteredGroupWriter(ctx, groupFields, comparators, aggregator, inRecordDesc, |
| recordDescriptors[0], writer); |
| pgw.open(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| pgw.nextFrame(buffer); |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| pgw.fail(); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| pgw.close(); |
| } |
| }; |
| } |
| } |