| /* |
| * 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.aggregators; |
| |
| import java.io.DataOutput; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor; |
| import edu.uci.ics.hyracks.api.context.IHyracksStageletContext; |
| 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.ArrayTupleBuilder; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameTupleAppender; |
| import edu.uci.ics.hyracks.dataflow.std.group.IAccumulatingAggregator; |
| import edu.uci.ics.hyracks.dataflow.std.group.IAccumulatingAggregatorFactory; |
| import edu.uci.ics.hyracks.dataflow.std.group.ISpillableAccumulatingAggregator; |
| |
| public class MultiAggregatorFactory implements IAccumulatingAggregatorFactory { |
| private static final long serialVersionUID = 1L; |
| |
| private IFieldValueResultingAggregatorFactory[] aFactories; |
| |
| public MultiAggregatorFactory(IFieldValueResultingAggregatorFactory[] aFactories) { |
| this.aFactories = aFactories; |
| } |
| |
| @Override |
| public ISpillableAccumulatingAggregator createSpillableAggregator(IHyracksStageletContext ctx, |
| RecordDescriptor inRecordDesc, final RecordDescriptor outRecordDescriptor) { |
| final ISpillableFieldValueResultingAggregator aggregators[] = new ISpillableFieldValueResultingAggregator[aFactories.length]; |
| for (int i = 0; i < aFactories.length; ++i) { |
| aggregators[i] = aFactories[i].createSpillableFieldValueResultingAggregator(); |
| } |
| final ArrayTupleBuilder tb = new ArrayTupleBuilder(outRecordDescriptor.getFields().length); |
| return new ISpillableAccumulatingAggregator() { |
| private boolean pending; |
| |
| @Override |
| public boolean output(FrameTupleAppender appender, IFrameTupleAccessor accessor, int tIndex, |
| int[] keyFieldIndexes) throws HyracksDataException { |
| if (!pending) { |
| tb.reset(); |
| for (int i = 0; i < keyFieldIndexes.length; ++i) { |
| tb.addField(accessor, tIndex, keyFieldIndexes[i]); |
| } |
| DataOutput dos = tb.getDataOutput(); |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].output(dos); |
| tb.addFieldEndOffset(); |
| } |
| } |
| if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) { |
| pending = true; |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public void init(IFrameTupleAccessor accessor, int tIndex) throws HyracksDataException { |
| tb.reset(); |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].init(accessor, tIndex); |
| } |
| pending = false; |
| } |
| |
| @Override |
| public void accumulate(IFrameTupleAccessor accessor, int tIndex) throws HyracksDataException { |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].accumulate(accessor, tIndex); |
| } |
| } |
| |
| @Override |
| public void initFromPartial(IFrameTupleAccessor accessor, int tIndex, int[] keyFieldIndexes) |
| throws HyracksDataException { |
| tb.reset(); |
| for (int i = 0; i < aggregators.length; i++) { |
| aggregators[i].initFromPartial(accessor, tIndex, keyFieldIndexes.length + i); |
| } |
| pending = false; |
| } |
| |
| @Override |
| public void accumulatePartialResult(IFrameTupleAccessor accessor, int tIndex, int[] keyFieldIndexes) |
| throws HyracksDataException { |
| for (int i = 0; i < aggregators.length; i++) { |
| aggregators[i].accumulatePartialResult(accessor, tIndex, keyFieldIndexes.length + i); |
| } |
| |
| } |
| |
| @Override |
| public boolean output(FrameTupleAppender appender, ArrayTupleBuilder tbder) throws HyracksDataException { |
| if (!pending) { |
| // TODO Here to be fixed: |
| DataOutput dos = tbder.getDataOutput(); |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].output(dos); |
| tbder.addFieldEndOffset(); |
| } |
| } |
| if (!appender.append(tbder.getFieldEndOffsets(), tbder.getByteArray(), 0, tbder.getSize())) { |
| pending = true; |
| return false; |
| } |
| return true; |
| } |
| }; |
| } |
| |
| @Override |
| public IAccumulatingAggregator createAggregator(IHyracksStageletContext ctx, RecordDescriptor inRecordDesc, |
| RecordDescriptor outRecordDescriptor) throws HyracksDataException { |
| final IFieldValueResultingAggregator aggregators[] = new IFieldValueResultingAggregator[aFactories.length]; |
| for (int i = 0; i < aFactories.length; ++i) { |
| aggregators[i] = aFactories[i].createFieldValueResultingAggregator(); |
| } |
| final ArrayTupleBuilder tb = new ArrayTupleBuilder(outRecordDescriptor.getFields().length); |
| return new IAccumulatingAggregator() { |
| |
| private boolean pending; |
| |
| @Override |
| public void init(IFrameTupleAccessor accessor, int tIndex) throws HyracksDataException { |
| tb.reset(); |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].init(accessor, tIndex); |
| } |
| pending = false; |
| } |
| |
| @Override |
| public void accumulate(IFrameTupleAccessor accessor, int tIndex) throws HyracksDataException { |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].accumulate(accessor, tIndex); |
| } |
| } |
| |
| @Override |
| public boolean output(FrameTupleAppender appender, IFrameTupleAccessor accessor, int tIndex, |
| int[] keyFieldIndexes) throws HyracksDataException { |
| if (!pending) { |
| tb.reset(); |
| for (int i = 0; i < keyFieldIndexes.length; ++i) { |
| tb.addField(accessor, tIndex, keyFieldIndexes[i]); |
| } |
| DataOutput dos = tb.getDataOutput(); |
| for (int i = 0; i < aggregators.length; ++i) { |
| aggregators[i].output(dos); |
| tb.addFieldEndOffset(); |
| } |
| } |
| if (!appender.append(tb.getFieldEndOffsets(), tb.getByteArray(), 0, tb.getSize())) { |
| pending = true; |
| return false; |
| } |
| return true; |
| } |
| |
| }; |
| } |
| } |