io.trino.plugin.hive.coercions.FloatToVarcharCoercers Maven / Gradle / Ivy
/*
* 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 io.trino.plugin.hive.coercions;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import io.trino.spi.TrinoException;
import io.trino.spi.block.Block;
import io.trino.spi.block.BlockBuilder;
import io.trino.spi.type.RealType;
import io.trino.spi.type.VarcharType;
import static io.airlift.slice.SliceUtf8.countCodePoints;
import static io.trino.spi.StandardErrorCode.INVALID_ARGUMENTS;
import static io.trino.spi.type.RealType.REAL;
import static java.lang.String.format;
public final class FloatToVarcharCoercers
{
private FloatToVarcharCoercers() {}
public static TypeCoercer createFloatToVarcharCoercer(VarcharType toType, boolean isOrcFile)
{
return isOrcFile ? new OrcFloatToVarcharCoercer(toType) : new FloatToVarcharCoercer(toType);
}
public static class FloatToVarcharCoercer
extends TypeCoercer
{
public FloatToVarcharCoercer(VarcharType toType)
{
super(REAL, toType);
}
@Override
protected void applyCoercedValue(BlockBuilder blockBuilder, Block block, int position)
{
writeFloatAsSlice(REAL.getFloat(block, position), blockBuilder, toType);
}
}
public static class OrcFloatToVarcharCoercer
extends TypeCoercer
{
public OrcFloatToVarcharCoercer(VarcharType toType)
{
super(REAL, toType);
}
@Override
protected void applyCoercedValue(BlockBuilder blockBuilder, Block block, int position)
{
float floatValue = REAL.getFloat(block, position);
if (Float.isNaN(floatValue)) {
blockBuilder.appendNull();
return;
}
writeFloatAsSlice(floatValue, blockBuilder, toType);
}
}
private static void writeFloatAsSlice(float value, BlockBuilder blockBuilder, VarcharType varcharType)
{
Slice converted = Slices.utf8Slice(Float.toString(value));
if (!varcharType.isUnbounded() && countCodePoints(converted) > varcharType.getBoundedLength()) {
throw new TrinoException(INVALID_ARGUMENTS, format("Varchar representation of %s exceeds %s bounds", value, varcharType));
}
varcharType.writeSlice(blockBuilder, converted);
}
}
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