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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 at
*
* 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 org.apache.drill.exec.physical.impl.orderedpartitioner;
import java.util.List;
import javax.inject.Named;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.record.TransferPair;
import org.apache.drill.exec.record.VectorAccessible;
import org.apache.drill.exec.record.VectorContainer;
import org.apache.drill.exec.record.selection.SelectionVector2;
import org.apache.drill.exec.record.selection.SelectionVector4;
import org.apache.drill.exec.vector.IntVector;
import com.google.common.collect.ImmutableList;
public abstract class OrderedPartitionProjectorTemplate implements OrderedPartitionProjector {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(OrderedPartitionProjectorTemplate.class);
private ImmutableList<TransferPair> transfers;
private VectorContainer partitionVectors;
private int partitions;
private SelectionVector2 vector2;
private SelectionVector4 vector4;
private SelectionVectorMode svMode;
private RecordBatch outBatch;
private SchemaPath outputField;
private IntVector partitionValues;
public OrderedPartitionProjectorTemplate() throws SchemaChangeException{
}
private int getPartition(int index) {
//TODO replace this with binary search
int partitionIndex = 0;
while (partitionIndex < partitions - 1 && doEval(index, partitionIndex) >= 0) {
partitionIndex++;
}
return partitionIndex;
}
@Override
public final int projectRecords(final int recordCount, int firstOutputIndex) {
final int countN = recordCount;
int counter = 0;
for (int i = 0; i < countN; i++, firstOutputIndex++) {
int partition = getPartition(i);
partitionValues.getMutator().setSafe(i, partition);
counter++;
}
for(TransferPair t : transfers){
t.transfer();
}
return counter;
}
@Override
public final void setup(FragmentContext context, VectorAccessible incoming, RecordBatch outgoing, List<TransferPair> transfers,
VectorContainer partitionVectors, int partitions, SchemaPath outputField) throws SchemaChangeException{
this.svMode = incoming.getSchema().getSelectionVectorMode();
this.outBatch = outgoing;
this.outputField = outputField;
partitionValues = (IntVector) outBatch.getValueAccessorById(IntVector.class, outBatch.getValueVectorId(outputField).getFieldIds()).getValueVector();
switch(svMode){
case FOUR_BYTE:
case TWO_BYTE:
throw new UnsupportedOperationException("Selection vector not supported");
}
this.transfers = ImmutableList.copyOf(transfers);
this.partitions = partitions;
doSetup(context, incoming, outgoing, partitionVectors);
}
public abstract void doSetup(@Named("context") FragmentContext context, @Named("incoming") VectorAccessible incoming,
@Named("outgoing") RecordBatch outgoing, @Named("partitionVectors") VectorContainer partitionVectors);
public abstract int doEval(@Named("inIndex") int inIndex, @Named("partitionIndex") int partitionIndex);
}
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