| /* |
| * 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 com.fasterxml.jackson.annotation.JsonCreator; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Ordering; |
| |
| import javax.annotation.Nullable; |
| import java.util.List; |
| |
| public class TimestampMaxAggregatorFactory extends TimestampAggregatorFactory |
| { |
| @JsonCreator |
| public TimestampMaxAggregatorFactory( |
| @JsonProperty("name") String name, |
| @JsonProperty("fieldName") @Nullable String fieldName, |
| @JsonProperty("timeFormat") @Nullable String timeFormat |
| ) |
| { |
| super(name, fieldName, timeFormat, Ordering.natural(), Long.MIN_VALUE); |
| Preconditions.checkNotNull(name, "Must have a valid, non-null aggregator name"); |
| } |
| |
| @Override |
| public AggregatorFactory getCombiningFactory() |
| { |
| return new TimestampMaxAggregatorFactory(name, name, timeFormat); |
| } |
| |
| @Override |
| public List<AggregatorFactory> getRequiredColumns() |
| { |
| return ImmutableList.of( |
| new TimestampMaxAggregatorFactory(name, fieldName, timeFormat) |
| ); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "TimestampMaxAggregatorFactory{" + |
| "name='" + name + '\'' + |
| ", fieldName='" + fieldName + '\'' + |
| ", timeFormat='" + timeFormat + '\'' + |
| '}'; |
| } |
| } |