| /* |
| * 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.project; |
| |
| import java.util.List; |
| |
| import javax.inject.Named; |
| |
| 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.selection.SelectionVector2; |
| import org.apache.drill.exec.record.selection.SelectionVector4; |
| import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList; |
| |
| public abstract class ProjectorTemplate implements Projector { |
| |
| private ImmutableList<TransferPair> transfers; |
| private SelectionVector2 vector2; |
| @SuppressWarnings("unused") |
| private SelectionVector4 vector4; |
| private SelectionVectorMode svMode; |
| |
| public ProjectorTemplate() { } |
| |
| @Override |
| public final int projectRecords(RecordBatch incomingRecordBatch, int startIndex, int recordCount, |
| int firstOutputIndex) { |
| assert incomingRecordBatch != this; // mixed up incoming and outgoing batches? |
| switch (svMode) { |
| case FOUR_BYTE: |
| throw new UnsupportedOperationException(); |
| |
| case TWO_BYTE: |
| int count = recordCount; |
| for (int i = 0; i < count; i++, firstOutputIndex++) { |
| try { |
| doEval(vector2.getIndex(i), firstOutputIndex); |
| } catch (SchemaChangeException e) { |
| throw new UnsupportedOperationException(e); |
| } |
| } |
| return recordCount; |
| |
| case NONE: |
| int countN = recordCount; |
| int i; |
| for (i = startIndex; i < startIndex + countN; i++, firstOutputIndex++) { |
| try { |
| doEval(i, firstOutputIndex); |
| } catch (SchemaChangeException e) { |
| throw new UnsupportedOperationException(e); |
| } |
| } |
| int totalBatchRecordCount = incomingRecordBatch.getRecordCount(); |
| if (startIndex + recordCount < totalBatchRecordCount || startIndex > 0 ) { |
| for (TransferPair t : transfers) { |
| t.splitAndTransfer(startIndex, i - startIndex); |
| } |
| return i - startIndex; |
| } |
| for (TransferPair t : transfers) { |
| t.transfer(); |
| } |
| return recordCount; |
| |
| default: |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| @Override |
| public final void setup(FragmentContext context, RecordBatch incoming, |
| RecordBatch outgoing, List<TransferPair> transfers) throws SchemaChangeException { |
| this.svMode = incoming.getSchema().getSelectionVectorMode(); |
| switch (svMode) { |
| case FOUR_BYTE: |
| vector4 = incoming.getSelectionVector4(); |
| break; |
| case TWO_BYTE: |
| vector2 = incoming.getSelectionVector2(); |
| break; |
| case NONE: |
| break; |
| default: |
| throw new UnsupportedOperationException(); |
| } |
| this.transfers = ImmutableList.copyOf(transfers); |
| doSetup(context, incoming, outgoing); |
| } |
| |
| public abstract void doSetup(@Named("context") FragmentContext context, |
| @Named("incoming") RecordBatch incoming, |
| @Named("outgoing") RecordBatch outgoing) |
| throws SchemaChangeException; |
| public abstract void doEval(@Named("inIndex") int inIndex, |
| @Named("outIndex") int outIndex) |
| throws SchemaChangeException; |
| |
| @Override |
| public String toString() { |
| return "Projector[vector2=" + vector2 |
| + ", selectionVectorMode=" + svMode |
| + "]"; |
| } |
| } |