com.facebook.presto.jdbc.internal.common.block.RowBlock Maven / Gradle / Ivy
/*
* 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 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 com.facebook.presto.jdbc.internal.common.block;
import com.facebook.presto.jdbc.internal.jol.info.ClassLayout;
import com.facebook.presto.jdbc.internal.javax.annotation.Nullable;
import java.util.Arrays;
import java.util.Objects;
import java.util.Optional;
import java.util.function.ObjLongConsumer;
import static com.facebook.presto.jdbc.internal.common.block.BlockUtil.ensureBlocksAreLoaded;
import static com.facebook.presto.jdbc.internal.io.airlift.slice.SizeOf.sizeOf;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
public class RowBlock
extends AbstractRowBlock
implements Block
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(RowBlock.class).instanceSize();
private final int startOffset;
private final int positionCount;
@Nullable
private final boolean[] rowIsNull;
private final int[] fieldBlockOffsets;
private final Block[] fieldBlocks;
private final long retainedSizeInBytes;
private volatile long sizeInBytes;
private volatile long logicalSizeInBytes;
/**
* Create a row block directly from columnar nulls and field blocks.
*/
public static Block fromFieldBlocks(int positionCount, Optional rowIsNullOptional, Block[] fieldBlocks)
{
boolean[] rowIsNull = rowIsNullOptional.orElse(null);
int[] fieldBlockOffsets = new int[positionCount + 1];
if (rowIsNull == null) {
// Fast-path create identity field block offsets from position only
for (int position = 0; position < fieldBlockOffsets.length; position++) {
fieldBlockOffsets[position] = position;
}
}
else {
// Check for nulls when computing field block offsets
int currentOffset = 0;
for (int position = 0; position < positionCount; position++) {
fieldBlockOffsets[position] = currentOffset;
currentOffset += (rowIsNull[position] ? 0 : 1);
}
// fieldBlockOffsets is positionCount + 1 in length
fieldBlockOffsets[positionCount] = currentOffset;
if (currentOffset == positionCount) {
// No nulls encountered, discard the null mask
rowIsNull = null;
}
}
validateConstructorArguments(0, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
return new RowBlock(0, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
}
/**
* Create a row block directly without per element validations.
*/
static RowBlock createRowBlockInternal(int startOffset, int positionCount, @Nullable boolean[] rowIsNull, int[] fieldBlockOffsets, Block[] fieldBlocks)
{
validateConstructorArguments(startOffset, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
return new RowBlock(startOffset, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
}
private static void validateConstructorArguments(int startOffset, int positionCount, @Nullable boolean[] rowIsNull, int[] fieldBlockOffsets, Block[] fieldBlocks)
{
if (startOffset < 0) {
throw new IllegalArgumentException("arrayOffset is negative");
}
if (positionCount < 0) {
throw new IllegalArgumentException("positionCount is negative");
}
if (rowIsNull != null && rowIsNull.length - startOffset < positionCount) {
throw new IllegalArgumentException("rowIsNull length is less than positionCount");
}
requireNonNull(fieldBlockOffsets, "fieldBlockOffsets is null");
if (fieldBlockOffsets.length - startOffset < positionCount + 1) {
throw new IllegalArgumentException("fieldBlockOffsets length is less than positionCount");
}
requireNonNull(fieldBlocks, "fieldBlocks is null");
if (fieldBlocks.length <= 0) {
throw new IllegalArgumentException("Number of fields in RowBlock must be positive");
}
int firstFieldBlockPositionCount = fieldBlocks[0].getPositionCount();
for (int i = 1; i < fieldBlocks.length; i++) {
if (firstFieldBlockPositionCount != fieldBlocks[i].getPositionCount()) {
throw new IllegalArgumentException(format("length of field blocks differ: field 0: %s, block %s: %s", firstFieldBlockPositionCount, i, fieldBlocks[i].getPositionCount()));
}
}
}
/**
* Use createRowBlockInternal or fromFieldBlocks instead of this method. The caller of this method is assumed to have
* validated the arguments with validateConstructorArguments.
*/
private RowBlock(int startOffset, int positionCount, @Nullable boolean[] rowIsNull, int[] fieldBlockOffsets, Block[] fieldBlocks)
{
super(fieldBlocks.length);
this.startOffset = startOffset;
this.positionCount = positionCount;
this.rowIsNull = rowIsNull;
this.fieldBlockOffsets = fieldBlockOffsets;
this.fieldBlocks = fieldBlocks;
this.sizeInBytes = -1;
this.logicalSizeInBytes = -1;
long retainedSizeInBytes = INSTANCE_SIZE + sizeOf(fieldBlockOffsets) + sizeOf(rowIsNull);
for (Block fieldBlock : fieldBlocks) {
retainedSizeInBytes += fieldBlock.getRetainedSizeInBytes();
}
this.retainedSizeInBytes = retainedSizeInBytes;
}
@Override
protected Block[] getRawFieldBlocks()
{
return fieldBlocks;
}
@Override
protected int[] getFieldBlockOffsets()
{
return fieldBlockOffsets;
}
@Override
public int getOffsetBase()
{
return startOffset;
}
@Override
@Nullable
protected boolean[] getRowIsNull()
{
return rowIsNull;
}
@Override
public boolean mayHaveNull()
{
return rowIsNull != null;
}
@Override
public boolean isNull(int position)
{
checkReadablePosition(position);
return rowIsNull != null && rowIsNull[position + startOffset];
}
@Override
public int getPositionCount()
{
return positionCount;
}
@Override
public long getSizeInBytes()
{
if (sizeInBytes < 0) {
calculateSize();
}
return sizeInBytes;
}
@Override
public long getLogicalSizeInBytes()
{
if (logicalSizeInBytes < 0) {
calculateLogicalSize();
}
return logicalSizeInBytes;
}
private void calculateSize()
{
int startFieldBlockOffset = fieldBlockOffsets[startOffset];
int endFieldBlockOffset = fieldBlockOffsets[startOffset + positionCount];
int fieldBlockLength = endFieldBlockOffset - startFieldBlockOffset;
long sizeInBytes = (Integer.BYTES + Byte.BYTES) * (long) positionCount;
for (int i = 0; i < numFields; i++) {
sizeInBytes += fieldBlocks[i].getRegionSizeInBytes(startFieldBlockOffset, fieldBlockLength);
}
this.sizeInBytes = sizeInBytes;
}
private void calculateLogicalSize()
{
int startFieldBlockOffset = fieldBlockOffsets[startOffset];
int endFieldBlockOffset = fieldBlockOffsets[startOffset + positionCount];
int fieldBlockLength = endFieldBlockOffset - startFieldBlockOffset;
long sizeInBytes = (Integer.BYTES + Byte.BYTES) * (long) positionCount;
for (int i = 0; i < numFields; i++) {
sizeInBytes += fieldBlocks[i].getRegionLogicalSizeInBytes(startFieldBlockOffset, fieldBlockLength);
}
this.logicalSizeInBytes = sizeInBytes;
}
@Override
public long getRetainedSizeInBytes()
{
return retainedSizeInBytes;
}
@Override
public void retainedBytesForEachPart(ObjLongConsumer
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