/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* 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.linkedin.pinot.core.query.aggregation.groupby.utils;
import it.unimi.dsi.fastutil.doubles.Double2IntMap;
import it.unimi.dsi.fastutil.doubles.Double2IntOpenHashMap;
import it.unimi.dsi.fastutil.doubles.DoubleArrayList;
import it.unimi.dsi.fastutil.doubles.DoubleList;
/**
* Implementation of {@link ValueToIdMap} for double.
*/
public class DoubleToIdMap extends BaseValueToIdMap {
Double2IntMap _valueToIdMap;
DoubleList _idToValueMap;
public DoubleToIdMap() {
_valueToIdMap = new Double2IntOpenHashMap();
_valueToIdMap.defaultReturnValue(INVALID_KEY);
_idToValueMap = new DoubleArrayList();
}
@Override
public int put(double value) {
int id = _valueToIdMap.get(value);
if (id == INVALID_KEY) {
id = _idToValueMap.size();
_valueToIdMap.put(value, id);
_idToValueMap.add(value);
}
return id;
}
@Override
public double getDouble(int id) {
assert id < _idToValueMap.size();
return _idToValueMap.get(id);
}
@Override
public String getString(int id) {
assert id < _idToValueMap.size();
return (Double.valueOf(_idToValueMap.getDouble(id)).toString());
}
}