/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate licenses
* this file to you 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.scalar.arithmetic;
import com.google.common.collect.ImmutableMap;
import io.crate.metadata.*;
import io.crate.data.Input;
import io.crate.operation.scalar.ScalarFunctionModule;
import io.crate.types.DataType;
import io.crate.types.DataTypes;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public abstract class FloorFunction extends SingleArgumentArithmeticFunction {
public static final String NAME = "floor";
FloorFunction(FunctionInfo info) {
super(info);
}
public static void register(ScalarFunctionModule module) {
Map<DataType, SingleArgumentArithmeticFunction> functionMap =
ImmutableMap.<DataType, SingleArgumentArithmeticFunction>builder()
.put(DataTypes.FLOAT, new FloatFloorFunction(Collections.singletonList(DataTypes.FLOAT)))
.put(DataTypes.INTEGER, new FloatFloorFunction(Collections.singletonList(DataTypes.INTEGER)))
.put(DataTypes.DOUBLE, new DoubleFloorFunction(Collections.singletonList(DataTypes.DOUBLE)))
.put(DataTypes.LONG, new DoubleFloorFunction(Collections.singletonList(DataTypes.LONG)))
.put(DataTypes.SHORT, new DoubleFloorFunction(Collections.singletonList(DataTypes.SHORT)))
.put(DataTypes.BYTE, new DoubleFloorFunction(Collections.singletonList(DataTypes.BYTE)))
.put(DataTypes.UNDEFINED, new DoubleFloorFunction(Collections.singletonList(DataTypes.UNDEFINED)))
.build();
module.register(NAME, new Resolver(NAME, functionMap));
}
private static class DoubleFloorFunction extends FloorFunction {
DoubleFloorFunction(List<DataType> dataTypes) {
super(generateDoubleFunctionInfo(NAME, dataTypes));
}
@Override
public Long evaluate(Input[] args) {
Object value = args[0].value();
if (value == null) {
return null;
}
return ((Double) Math.floor(((Number) value).doubleValue())).longValue();
}
}
private static class FloatFloorFunction extends FloorFunction {
FloatFloorFunction(List<DataType> dataTypes) {
super(generateFloatFunctionInfo(NAME, dataTypes));
}
@Override
public Integer evaluate(Input[] args) {
Object value = args[0].value();
if (value == null) {
return null;
}
return ((Double) Math.floor(((Number) value).doubleValue())).intValue();
}
}
}