/**
* 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.svremover;
import java.io.IOException;
import java.util.List;
import org.apache.drill.exec.exception.ClassTransformationException;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.expr.CodeGenerator;
import org.apache.drill.exec.expr.TypeHelper;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.config.SelectionVectorRemover;
import org.apache.drill.exec.record.AbstractSingleRecordBatch;
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.TypedFieldId;
import org.apache.drill.exec.record.VectorWrapper;
import org.apache.drill.exec.record.WritableBatch;
import org.apache.drill.exec.vector.FixedWidthVector;
import org.apache.drill.exec.vector.ValueVector;
import org.apache.drill.exec.vector.VariableWidthVector;
import org.apache.drill.exec.vector.allocator.FixedVectorAllocator;
import org.apache.drill.exec.vector.allocator.VariableEstimatedVector;
import org.apache.drill.exec.vector.allocator.VectorAllocator;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JVar;
public class RemovingRecordBatch extends AbstractSingleRecordBatch<SelectionVectorRemover>{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(RemovingRecordBatch.class);
private Copier copier;
private int recordCount;
public RemovingRecordBatch(SelectionVectorRemover popConfig, FragmentContext context, RecordBatch incoming) {
super(popConfig, context, incoming);
}
@Override
public int getRecordCount() {
return recordCount;
}
@Override
protected void setupNewSchema() throws SchemaChangeException {
container.clear();
switch(incoming.getSchema().getSelectionVectorMode()){
case NONE:
this.copier = getStraightCopier();
break;
case TWO_BYTE:
this.copier = getGenerated2Copier();
break;
case FOUR_BYTE:
this.copier = getGenerated4Copier();
break;
default:
throw new UnsupportedOperationException();
}
container.buildSchema(SelectionVectorMode.NONE);
}
@Override
protected void doWork() {
recordCount = incoming.getRecordCount();
copier.copyRecords();
for(VectorWrapper<?> v : container){
ValueVector.Mutator m = v.getValueVector().getMutator();
m.setValueCount(recordCount);
}
}
private class StraightCopier implements Copier{
private List<TransferPair> pairs = Lists.newArrayList();
private List<ValueVector> out = Lists.newArrayList();
@Override
public void setupRemover(FragmentContext context, RecordBatch incoming, RecordBatch outgoing, VectorAllocator[] allocators){
for(VectorWrapper<?> vv : incoming){
TransferPair tp = vv.getValueVector().getTransferPair();
pairs.add(tp);
out.add(tp.getTo());
}
}
@Override
public void copyRecords() {
for(TransferPair tp : pairs){
tp.transfer();
}
}
public List<ValueVector> getOut() {
return out;
}
}
private Copier getStraightCopier(){
StraightCopier copier = new StraightCopier();
copier.setupRemover(context, incoming, this, null);
container.addCollection(copier.getOut());
return copier;
}
private Copier getGenerated2Copier() throws SchemaChangeException{
Preconditions.checkArgument(incoming.getSchema().getSelectionVectorMode() == SelectionVectorMode.TWO_BYTE);
List<VectorAllocator> allocators = Lists.newArrayList();
for(VectorWrapper<?> i : incoming){
ValueVector v = TypeHelper.getNewVector(i.getField(), context.getAllocator());
container.add(v);
allocators.add(VectorAllocator.getAllocator(i.getValueVector(), v));
}
try {
final CodeGenerator<Copier> cg = new CodeGenerator<Copier>(Copier.TEMPLATE_DEFINITION2, context.getFunctionRegistry());
generateCopies(cg, false);
Copier copier = context.getImplementationClass(cg);
copier.setupRemover(context, incoming, this, allocators.toArray(new VectorAllocator[allocators.size()]));
return copier;
} catch (ClassTransformationException | IOException e) {
throw new SchemaChangeException("Failure while attempting to load generated class", e);
}
}
private Copier getGenerated4Copier() throws SchemaChangeException{
Preconditions.checkArgument(incoming.getSchema().getSelectionVectorMode() == SelectionVectorMode.FOUR_BYTE);
List<VectorAllocator> allocators = Lists.newArrayList();
for(VectorWrapper<?> i : incoming){
ValueVector v = TypeHelper.getNewVector(i.getField(), context.getAllocator());
container.add(v);
allocators.add(getAllocator4(v));
}
try {
final CodeGenerator<Copier> cg = new CodeGenerator<Copier>(Copier.TEMPLATE_DEFINITION4, context.getFunctionRegistry());
generateCopies(cg, true);
Copier copier = context.getImplementationClass(cg);
copier.setupRemover(context, incoming, this, allocators.toArray(new VectorAllocator[allocators.size()]));
return copier;
} catch (ClassTransformationException | IOException e) {
throw new SchemaChangeException("Failure while attempting to load generated class", e);
}
}
private void generateCopies(CodeGenerator<Copier> g, boolean hyper){
// we have parallel ids for each value vector so we don't actually have to deal with managing the ids at all.
int fieldId = 0;
JExpression inIndex = JExpr.direct("inIndex");
JExpression outIndex = JExpr.direct("outIndex");
g.rotateBlock();
for(VectorWrapper<?> vv : incoming){
JVar inVV = g.declareVectorValueSetupAndMember("incoming", new TypedFieldId(vv.getField().getType(), fieldId, vv.isHyper()));
JVar outVV = g.declareVectorValueSetupAndMember("outgoing", new TypedFieldId(vv.getField().getType(), fieldId, false));
if(hyper){
g.getEvalBlock().add(
outVV
.invoke("copyFrom")
.arg(
inIndex.band(JExpr.lit((int) Character.MAX_VALUE)))
.arg(outIndex)
.arg(
inVV.component(inIndex.shrz(JExpr.lit(16)))
)
);
}else{
g.getEvalBlock().add(outVV.invoke("copyFrom").arg(inIndex).arg(outIndex).arg(inVV));
}
fieldId++;
}
}
@Override
public WritableBatch getWritableBatch() {
return WritableBatch.get(this);
}
private VectorAllocator getAllocator4(ValueVector outgoing){
if(outgoing instanceof FixedWidthVector){
return new FixedVectorAllocator((FixedWidthVector) outgoing);
}else if(outgoing instanceof VariableWidthVector ){
return new VariableEstimatedVector( (VariableWidthVector) outgoing, 250);
}else{
throw new UnsupportedOperationException();
}
}
}