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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.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.LongArrayBlockBuilder;
import com.facebook.presto.jdbc.internal.spi.block.PageBuilderStatus;
import static com.facebook.presto.jdbc.internal.spi.type.TypeSignature.parseTypeSignature;
import static java.lang.Double.doubleToLongBits;
import static java.lang.Double.longBitsToDouble;
public final class DoubleType
extends AbstractType
implements FixedWidthType
{
public static final DoubleType DOUBLE = new DoubleType();
private DoubleType()
{
super(parseTypeSignature(StandardTypes.DOUBLE), double.class);
}
@Override
public final int getFixedSize()
{
return Double.BYTES;
}
@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 longBitsToDouble(block.getLong(position, 0));
}
@Override
public boolean equalTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
double leftValue = longBitsToDouble(leftBlock.getLong(leftPosition, 0));
double rightValue = longBitsToDouble(rightBlock.getLong(rightPosition, 0));
// direct equality is correct here
// noinspection FloatingPointEquality
return leftValue == rightValue;
}
@Override
public long hash(Block block, int position)
{
// convert to canonical NaN if necessary
return AbstractLongType.hash(doubleToLongBits(longBitsToDouble(block.getLong(position, 0))));
}
@Override
public int compareTo(Block leftBlock, int leftPosition, Block rightBlock, int rightPosition)
{
double leftValue = longBitsToDouble(leftBlock.getLong(leftPosition, 0));
double rightValue = longBitsToDouble(rightBlock.getLong(rightPosition, 0));
return Double.compare(leftValue, rightValue);
}
@Override
public void appendTo(Block block, int position, BlockBuilder blockBuilder)
{
if (block.isNull(position)) {
blockBuilder.appendNull();
}
else {
blockBuilder.writeLong(block.getLong(position, 0)).closeEntry();
}
}
@Override
public double getDouble(Block block, int position)
{
return longBitsToDouble(block.getLong(position, 0));
}
@Override
public void writeDouble(BlockBuilder blockBuilder, double value)
{
blockBuilder.writeLong(doubleToLongBits(value)).closeEntry();
}
@Override
public final 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 LongArrayBlockBuilder(
blockBuilderStatus,
Math.min(expectedEntries, maxBlockSizeInBytes / Double.BYTES));
}
@Override
public final BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus, int expectedEntries)
{
return createBlockBuilder(blockBuilderStatus, expectedEntries, Double.BYTES);
}
@Override
public final BlockBuilder createFixedSizeBlockBuilder(int positionCount)
{
return new LongArrayBlockBuilder(null, positionCount);
}
@Override
@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
public boolean equals(Object other)
{
return other == DOUBLE;
}
@Override
public int hashCode()
{
return getClass().hashCode();
}
}