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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.jdbc.internal.spi.block;
import com.facebook.presto.jdbc.internal.spi.type.Type;
import com.facebook.presto.jdbc.internal.airlift.slice.DynamicSliceOutput;
import com.facebook.presto.jdbc.internal.airlift.slice.Slice;
import com.facebook.presto.jdbc.internal.airlift.slice.SliceOutput;
import com.facebook.presto.jdbc.internal.jol.info.ClassLayout;
import static java.util.Objects.requireNonNull;
public class ArrayBlockBuilder
extends AbstractArrayBlock
implements BlockBuilder
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(ArrayBlockBuilder.class).instanceSize() + BlockBuilderStatus.INSTANCE_SIZE;
private final BlockBuilderStatus blockBuilderStatus;
private final BlockBuilder values;
private final SliceOutput offsets;
private final SliceOutput valueIsNull;
private static final int OFFSET_BASE = 0;
private int currentEntrySize;
/**
* Caller of this constructor is responsible for making sure `valuesBlock` is constructed with the same `blockBuilderStatus` as the one in the argument
*/
public ArrayBlockBuilder(BlockBuilder valuesBlock, BlockBuilderStatus blockBuilderStatus, int expectedEntries)
{
this(
blockBuilderStatus,
valuesBlock,
new DynamicSliceOutput(expectedEntries * 4),
new DynamicSliceOutput(expectedEntries));
}
public ArrayBlockBuilder(Type elementType, BlockBuilderStatus blockBuilderStatus, int expectedEntries, int expectedBytesPerEntry)
{
this(
blockBuilderStatus,
elementType.createBlockBuilder(blockBuilderStatus, expectedEntries, expectedBytesPerEntry),
new DynamicSliceOutput(expectedEntries * 4),
new DynamicSliceOutput(expectedEntries));
}
public ArrayBlockBuilder(Type elementType, BlockBuilderStatus blockBuilderStatus, int expectedEntries)
{
this(
blockBuilderStatus,
elementType.createBlockBuilder(blockBuilderStatus, expectedEntries),
new DynamicSliceOutput(expectedEntries * 4),
new DynamicSliceOutput(expectedEntries));
}
/**
* Caller of this private constructor is responsible for making sure `values` is constructed with the same `blockBuilderStatus` as the one in the argument
*/
private ArrayBlockBuilder(BlockBuilderStatus blockBuilderStatus, BlockBuilder values, SliceOutput offsets, SliceOutput valueIsNull)
{
this.blockBuilderStatus = requireNonNull(blockBuilderStatus, "blockBuilderStatus is null");
this.values = requireNonNull(values, "values is null");
this.offsets = requireNonNull(offsets, "offset is null");
this.valueIsNull = requireNonNull(valueIsNull);
}
@Override
public int getPositionCount()
{
return valueIsNull.size();
}
@Override
public int getSizeInBytes()
{
return values.getSizeInBytes() + offsets.size() + valueIsNull.size();
}
@Override
public int getRetainedSizeInBytes()
{
return INSTANCE_SIZE + values.getRetainedSizeInBytes() + offsets.getRetainedSize() + valueIsNull.getRetainedSize();
}
@Override
protected Block getValues()
{
return values;
}
@Override
protected Slice getOffsets()
{
return offsets.getUnderlyingSlice();
}
@Override
protected int getOffsetBase()
{
return OFFSET_BASE;
}
@Override
protected Slice getValueIsNull()
{
return valueIsNull.getUnderlyingSlice();
}
@Override
public void assureLoaded()
{
}
@Override
public BlockBuilder writeByte(int value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeShort(int value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeInt(int value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeLong(long value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeFloat(float value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeDouble(double value)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeBytes(Slice source, int sourceIndex, int length)
{
throw new UnsupportedOperationException();
}
@Override
public BlockBuilder writeObject(Object value)
{
if (currentEntrySize != 0) {
throw new IllegalStateException("Expected entry size to be exactly " + 0 + " but was " + currentEntrySize);
}
Block block = (Block) value;
for (int i = 0; i < block.getPositionCount(); i++) {
if (block.isNull(i)) {
values.appendNull();
}
else {
block.writePositionTo(i, values);
values.closeEntry();
}
}
currentEntrySize++;
return this;
}
@Override
public ArrayElementBlockWriter beginBlockEntry()
{
if (currentEntrySize != 0) {
throw new IllegalStateException("Expected current entry size to be exactly 0 but was " + currentEntrySize);
}
currentEntrySize++;
return new ArrayElementBlockWriter(values, values.getPositionCount());
}
@Override
public BlockBuilder closeEntry()
{
if (currentEntrySize != 1) {
throw new IllegalStateException("Expected entry size to be exactly 1 but was " + currentEntrySize);
}
entryAdded(false);
currentEntrySize = 0;
return this;
}
@Override
public BlockBuilder appendNull()
{
if (currentEntrySize > 0) {
throw new IllegalStateException("Current entry must be closed before a null can be written");
}
entryAdded(true);
return this;
}
private void entryAdded(boolean isNull)
{
offsets.appendInt(values.getPositionCount());
valueIsNull.appendByte(isNull ? 1 : 0);
blockBuilderStatus.addBytes(Integer.BYTES + Byte.BYTES);
}
@Override
public ArrayBlock build()
{
if (currentEntrySize > 0) {
throw new IllegalStateException("Current entry must be closed before the block can be built");
}
return new ArrayBlock(values.build(), offsets.slice(), OFFSET_BASE, valueIsNull.slice());
}
@Override
public String toString()
{
StringBuilder sb = new StringBuilder("ArrayBlockBuilder{");
sb.append("positionCount=").append(getPositionCount());
sb.append('}');
return sb.toString();
}
}
