/*
* Copyright 2014 Red Hat, Inc. and/or its affiliates.
*
* 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 org.dashbuilder.dataset.group;
import java.util.Arrays;
import java.util.List;
import org.dashbuilder.dataset.ColumnType;
/**
* List of available aggregate functions used in data set group operations.
*/
public enum AggregateFunctionType {
COUNT,
DISTINCT,
AVERAGE,
SUM,
MIN,
MAX;
private static AggregateFunctionType[] _typeArray = values();
private static List<AggregateFunctionType> _numericOnly = Arrays.asList(AVERAGE, SUM, MAX, MIN);
public int getIndex() {
for (int i = 0; i < _typeArray.length; i++) {
AggregateFunctionType type = _typeArray[i];
if (this.equals(type)) return i;
}
return -1;
}
public boolean supportType(ColumnType type) {
if (_numericOnly.contains(this)) {
return type != null && type.equals(ColumnType.NUMBER);
}
return true;
}
public static AggregateFunctionType getByIndex(int index) {
return _typeArray[index];
}
public static AggregateFunctionType getByName(String str) {
try {
return valueOf(str.toUpperCase());
} catch (Exception e) {
return null;
}
}
}