| /* |
| * 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.druid.query.aggregation; |
| |
| import org.apache.druid.segment.BaseFloatColumnValueSelector; |
| |
| /** |
| */ |
| public class FloatMaxAggregator implements Aggregator |
| { |
| static double combineValues(Object lhs, Object rhs) |
| { |
| return Math.max(((Number) lhs).floatValue(), ((Number) rhs).floatValue()); |
| } |
| |
| private final BaseFloatColumnValueSelector selector; |
| |
| private float max; |
| |
| public FloatMaxAggregator(BaseFloatColumnValueSelector selector) |
| { |
| this.selector = selector; |
| this.max = Float.NEGATIVE_INFINITY; |
| } |
| |
| @Override |
| public void aggregate() |
| { |
| max = Math.max(max, selector.getFloat()); |
| } |
| |
| @Override |
| public Object get() |
| { |
| return max; |
| } |
| |
| @Override |
| public float getFloat() |
| { |
| return max; |
| } |
| |
| @Override |
| public long getLong() |
| { |
| return (long) max; |
| } |
| |
| @Override |
| public double getDouble() |
| { |
| return (double) max; |
| } |
| |
| @Override |
| public void close() |
| { |
| // no resources to cleanup |
| } |
| } |