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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.type;
import com.facebook.presto.jdbc.internal.spi.ConnectorSession;
import com.facebook.presto.jdbc.internal.spi.PrestoException;
import com.facebook.presto.jdbc.internal.spi.block.Block;
import com.facebook.presto.jdbc.internal.spi.block.BlockBuilder;
import com.facebook.presto.jdbc.internal.spi.block.BlockBuilderStatus;
import com.facebook.presto.jdbc.internal.spi.block.ByteArrayBlockBuilder;
import com.facebook.presto.jdbc.internal.spi.block.PageBuilderStatus;
import static com.facebook.presto.jdbc.internal.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static com.facebook.presto.jdbc.internal.spi.type.TypeSignature.parseTypeSignature;
import static java.lang.Long.rotateLeft;
public final class TinyintType
extends AbstractType
implements FixedWidthType
{
public static final TinyintType TINYINT = new TinyintType();
private TinyintType()
{
super(parseTypeSignature(StandardTypes.TINYINT), long.class);
}
@Override
public int getFixedSize()
{
return Byte.BYTES;
}
@Override
public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries, int expectedBytesPerEntry)
{
int maxBlockSizeInBytes;
if (blockBuilderStatus == null) {
maxBlockSizeInBytes = PageBuilderStatus.DEFAULT_MAX_PAGE_SIZE_IN_BYTES;
}
else {
maxBlockSizeInBytes = blockBuilderStatus.getMaxPageSizeInBytes();
}
return new ByteArrayBlockBuilder(
blockBuilderStatus,
Math.min(expectedEntries, maxBlockSizeInBytes / Byte.BYTES));
}
@Override
public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries)
{
return createBlockBuilder(blockBuilderStatus, expectedEntries, Byte.BYTES);
}
@Override
public BlockBuilder createFixedSizeBlockBuilder(int positionCount)
{
return new ByteArrayBlockBuilder(null, positionCount);
}
@Override
public boolean isComparable()
{
return true;
}
@Override
public boolean isOrderable()
{
return true;
}
@Override
public Object getObjectValue(ConnectorSession session, Block block, int position)
{
if (block.isNull(position)) {
return null;
}
return block.getByte(position, 0);
}
@Override
public boolean equalTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
int leftValue = leftBlock.getByte(leftPosition, 0);
int rightValue = rightBlock.getByte(rightPosition, 0);
return leftValue == rightValue;
}
@Override
public long hash(Block block, int position)
{
return hash(block.getByte(position, 0));
}
@Override
public int compareTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
// WARNING: the correctness of InCodeGenerator is dependent on the implementation of this
// function being the equivalence of internal long representation.
byte leftValue = leftBlock.getByte(leftPosition, 0);
byte rightValue = rightBlock.getByte(rightPosition, 0);
return Byte.compare(leftValue, rightValue);
}
@Override
public void appendTo(Block block, int position, BlockBuilder blockBuilder)
{
if (block.isNull(position)) {
blockBuilder.appendNull();
}
else {
blockBuilder.writeByte(block.getByte(position, 0)).closeEntry();
}
}
@Override
public long getLong(Block block, int position)
{
return (long) block.getByte(position, 0);
}
@Override
public void writeLong(BlockBuilder blockBuilder, long value)
{
if (value > Byte.MAX_VALUE) {
throw new PrestoException(GENERIC_INTERNAL_ERROR, String.format("Value %d exceeds MAX_BYTE", value));
}
else if (value < Byte.MIN_VALUE) {
throw new PrestoException(GENERIC_INTERNAL_ERROR, String.format("Value %d is less than MIN_BYTE", value));
}
blockBuilder.writeByte((int) value).closeEntry();
}
@Override
public boolean equals(Object other)
{
return other == TINYINT;
}
@Override
public int hashCode()
{
return getClass().hashCode();
}
public static long hash(byte value)
{
// xxhash64 mix
return rotateLeft(value * 0xC2B2AE3D27D4EB4FL, 31) * 0x9E3779B185EBCA87L;
}
}