/*
* 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.type;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.block.FixedWidthBlockBuilder;
import io.airlift.slice.Slice;
import static com.facebook.presto.spi.type.Decimals.MAX_PRECISION;
import static com.facebook.presto.spi.type.Decimals.decodeUnscaledValue;
import static com.facebook.presto.spi.type.UnscaledDecimal128Arithmetic.UNSCALED_DECIMAL_128_SLICE_LENGTH;
import static com.facebook.presto.spi.type.UnscaledDecimal128Arithmetic.compare;
import static io.airlift.slice.SizeOf.SIZE_OF_LONG;
final class LongDecimalType
extends DecimalType
{
LongDecimalType(int precision, int scale)
{
super(precision, scale, Slice.class);
validatePrecisionScale(precision, scale, MAX_PRECISION);
}
@Override
public int getFixedSize()
{
return UNSCALED_DECIMAL_128_SLICE_LENGTH;
}
@Override
public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries, int expectedBytesPerEntry)
{
return new FixedWidthBlockBuilder(
getFixedSize(),
blockBuilderStatus,
Math.min(expectedEntries, blockBuilderStatus.getMaxBlockSizeInBytes() / getFixedSize()));
}
@Override
public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries)
{
return createBlockBuilder(blockBuilderStatus, expectedEntries, getFixedSize());
}
@Override
public BlockBuilder createFixedSizeBlockBuilder(int positionCount)
{
return new FixedWidthBlockBuilder(getFixedSize(), positionCount);
}
@Override
public Object getObjectValue(ConnectorSession session, Block block, int position)
{
if (block.isNull(position)) {
return null;
}
Slice slice = block.getSlice(position, 0, getFixedSize());
return new SqlDecimal(decodeUnscaledValue(slice), getPrecision(), getScale());
}
@Override
public boolean equalTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
return compareTo(leftBlock, leftPosition, rightBlock, rightPosition) == 0;
}
@Override
public long hash(Block block, int position)
{
long low = block.getLong(position, 0);
long high = block.getLong(position, SIZE_OF_LONG);
return UnscaledDecimal128Arithmetic.hash(low, high);
}
@Override
public int compareTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
long leftLow = leftBlock.getLong(leftPosition, 0);
long leftHigh = leftBlock.getLong(leftPosition, SIZE_OF_LONG);
long rightLow = rightBlock.getLong(rightPosition, 0);
long rightHigh = rightBlock.getLong(rightPosition, SIZE_OF_LONG);
return compare(leftLow, leftHigh, rightLow, rightHigh);
}
@Override
public void appendTo(Block block, int position, BlockBuilder blockBuilder)
{
if (block.isNull(position)) {
blockBuilder.appendNull();
}
else {
block.writeBytesTo(position, 0, getFixedSize(), blockBuilder);
blockBuilder.closeEntry();
}
}
@Override
public void writeSlice(BlockBuilder blockBuilder, Slice value)
{
writeSlice(blockBuilder, value, 0, value.length());
}
@Override
public void writeSlice(BlockBuilder blockBuilder, Slice value, int offset, int length)
{
blockBuilder.writeBytes(value, offset, length).closeEntry();
}
@Override
public Slice getSlice(Block block, int position)
{
return block.getSlice(position, 0, getFixedSize());
}
}