/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */
package org.apache.ambari.metrics.core.timeline.function;

import org.apache.ambari.metrics.core.timeline.aggregators.Function;

public enum SeriesAggregateFunction {
  AVG, MIN, MAX, SUM;

  public static boolean isPresent(String functionName) {
    try {
      SeriesAggregateFunction.valueOf(functionName.toUpperCase());
    } catch (IllegalArgumentException e) {
      return false;
    }
    return true;
  }

  public static SeriesAggregateFunction getFunction(String functionName) throws Function.FunctionFormatException {
    try {
      return SeriesAggregateFunction.valueOf(functionName.toUpperCase());
    } catch (NullPointerException | IllegalArgumentException e) {
      throw new Function.FunctionFormatException(
            "Function should be sum, avg, min, max. Got " + functionName, e);
    }
  }
}
