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/*
* 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.spi.block;
import org.openjdk.jol.info.ClassLayout;
import javax.annotation.Nullable;
import java.util.Optional;
import java.util.function.BiConsumer;
import static io.airlift.slice.SizeOf.sizeOf;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
public class RowBlock
extends AbstractRowBlock
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(RowBlock.class).instanceSize();
private final int startOffset;
private final int positionCount;
private final boolean[] rowIsNull;
private final int[] fieldBlockOffsets;
private final Block[] fieldBlocks;
private volatile long sizeInBytes;
private final long retainedSizeInBytes;
/**
* Create a row block directly from columnar nulls and field blocks.
*/
public static Block fromFieldBlocks(int positionCount, Optional rowIsNull, Block[] fieldBlocks)
{
int[] fieldBlockOffsets = new int[positionCount + 1];
for (int position = 0; position < positionCount; position++) {
fieldBlockOffsets[position + 1] = fieldBlockOffsets[position] + (rowIsNull.isPresent() && rowIsNull.get()[position] ? 0 : 1);
}
validateConstructorArguments(0, positionCount, rowIsNull.orElse(null), fieldBlockOffsets, fieldBlocks);
return new RowBlock(0, positionCount, rowIsNull.orElse(null), 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;
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
protected int getOffsetBase()
{
return startOffset;
}
@Override
@Nullable
protected boolean[] getRowIsNull()
{
return rowIsNull;
}
@Override
public int getPositionCount()
{
return positionCount;
}
@Override
public long getSizeInBytes()
{
if (sizeInBytes < 0) {
calculateSize();
}
return sizeInBytes;
}
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;
}
@Override
public long getRetainedSizeInBytes()
{
return retainedSizeInBytes;
}
@Override
public void retainedBytesForEachPart(BiConsumer consumer)
{
for (int i = 0; i < numFields; i++) {
consumer.accept(fieldBlocks[i], fieldBlocks[i].getRetainedSizeInBytes());
}
consumer.accept(fieldBlockOffsets, sizeOf(fieldBlockOffsets));
consumer.accept(rowIsNull, sizeOf(rowIsNull));
consumer.accept(this, (long) INSTANCE_SIZE);
}
@Override
public String toString()
{
return format("RowBlock{numFields=%d, positionCount=%d}", numFields, getPositionCount());
}
@Override
public Block getLoadedBlock()
{
boolean allLoaded = true;
Block[] loadedFieldBlocks = new Block[fieldBlocks.length];
for (int i = 0; i < fieldBlocks.length; i++) {
loadedFieldBlocks[i] = fieldBlocks[i].getLoadedBlock();
if (loadedFieldBlocks[i] != fieldBlocks[i]) {
allLoaded = false;
}
}
if (allLoaded) {
return this;
}
return createRowBlockInternal(
startOffset,
positionCount,
rowIsNull,
fieldBlockOffsets,
loadedFieldBlocks);
}
}
