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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.aggregations.metrics.max;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregatorFactories.Builder;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSource.Numeric;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregationBuilder;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceParserHelper;
import org.elasticsearch.search.aggregations.support.ValuesSourceType;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
public class MaxAggregationBuilder extends ValuesSourceAggregationBuilder.LeafOnly<ValuesSource.Numeric, MaxAggregationBuilder> {
public static final String NAME = "max";
private static final ObjectParser<MaxAggregationBuilder, QueryParseContext> PARSER;
static {
PARSER = new ObjectParser<>(MaxAggregationBuilder.NAME);
ValuesSourceParserHelper.declareNumericFields(PARSER, true, true, false);
}
public static AggregationBuilder parse(String aggregationName, QueryParseContext context) throws IOException {
return PARSER.parse(context.parser(), new MaxAggregationBuilder(aggregationName), context);
}
public MaxAggregationBuilder(String name) {
super(name, ValuesSourceType.NUMERIC, ValueType.NUMERIC);
}
/**
* Read from a stream.
*/
public MaxAggregationBuilder(StreamInput in) throws IOException {
super(in, ValuesSourceType.NUMERIC, ValueType.NUMERIC);
}
@Override
protected void innerWriteTo(StreamOutput out) {
// Do nothing, no extra state to write to stream
}
@Override
protected MaxAggregatorFactory innerBuild(SearchContext context, ValuesSourceConfig<Numeric> config,
AggregatorFactory<?> parent, Builder subFactoriesBuilder) throws IOException {
return new MaxAggregatorFactory(name, config, context, parent, subFactoriesBuilder, metaData);
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
return builder;
}
@Override
protected int innerHashCode() {
return 0;
}
@Override
protected boolean innerEquals(Object obj) {
return true;
}
@Override
public String getType() {
return NAME;
}
}
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