| /* |
| * 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.pregelix.dataflow.std.group; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| 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.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| 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.AbstractUnaryInputUnaryOutputOperatorNodePushable; |
| |
| class ClusteredGroupOperatorNodePushable extends AbstractUnaryInputUnaryOutputOperatorNodePushable { |
| private final IHyracksTaskContext ctx; |
| private final int[] groupFields; |
| private final IBinaryComparatorFactory[] comparatorFactories; |
| private final IClusteredAggregatorDescriptorFactory aggregatorFactory; |
| private final RecordDescriptor inRecordDescriptor; |
| private final RecordDescriptor outRecordDescriptor; |
| private ClusteredGroupWriter pgw; |
| |
| ClusteredGroupOperatorNodePushable(IHyracksTaskContext ctx, int[] groupFields, |
| IBinaryComparatorFactory[] comparatorFactories, IClusteredAggregatorDescriptorFactory aggregatorFactory, |
| RecordDescriptor inRecordDescriptor, RecordDescriptor outRecordDescriptor) { |
| this.ctx = ctx; |
| this.groupFields = groupFields; |
| this.comparatorFactories = comparatorFactories; |
| this.aggregatorFactory = aggregatorFactory; |
| this.inRecordDescriptor = inRecordDescriptor; |
| this.outRecordDescriptor = outRecordDescriptor; |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| final IBinaryComparator[] comparators = new IBinaryComparator[comparatorFactories.length]; |
| for (int i = 0; i < comparatorFactories.length; ++i) { |
| comparators[i] = comparatorFactories[i].createBinaryComparator(); |
| } |
| final ByteBuffer copyFrame = ctx.allocateFrame(); |
| final FrameTupleAccessor copyFrameAccessor = new FrameTupleAccessor(ctx.getFrameSize(), inRecordDescriptor); |
| copyFrameAccessor.reset(copyFrame); |
| ByteBuffer outFrame = ctx.allocateFrame(); |
| final FrameTupleAppender appender = new FrameTupleAppender(ctx.getFrameSize()); |
| appender.reset(outFrame, true); |
| pgw = new ClusteredGroupWriter(ctx, groupFields, comparators, aggregatorFactory, inRecordDescriptor, |
| outRecordDescriptor, 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(); |
| } |
| } |