| /* |
| * 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.vector.IntVector; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class OrderedPartitionProjectorTemplate implements OrderedPartitionProjector { |
| static final Logger logger = LoggerFactory.getLogger(OrderedPartitionProjectorTemplate.class); |
| |
| private ImmutableList<TransferPair> transfers; |
| private int partitions; |
| private SelectionVectorMode svMode; |
| private RecordBatch outBatch; |
| private IntVector partitionValues; |
| |
| public OrderedPartitionProjectorTemplate() throws SchemaChangeException{ |
| } |
| |
| private int getPartition(int index) { |
| //TODO replace this with binary search |
| int partitionIndex = 0; |
| try { |
| while (partitionIndex < partitions - 1 && doEval(index, partitionIndex) >= 0) { |
| partitionIndex++; |
| } |
| } catch (SchemaChangeException e) { |
| throw new UnsupportedOperationException(e); |
| } |
| 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; |
| 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"); |
| default: |
| } |
| 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) |
| throws SchemaChangeException; |
| public abstract int doEval(@Named("inIndex") int inIndex, |
| @Named("partitionIndex") int partitionIndex) |
| throws SchemaChangeException; |
| } |