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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.valuecount;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.InternalAggregation.Type;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSourceAggregationBuilder;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceType;
import java.io.IOException;
public class ValueCountAggregationBuilder extends ValuesSourceAggregationBuilder.LeafOnly {
public static final String NAME = "value_count";
public static final Type TYPE = new Type(NAME);
public ValueCountAggregationBuilder(String name, ValueType targetValueType) {
super(name, TYPE, ValuesSourceType.ANY, targetValueType);
}
/**
* Read from a stream.
*/
public ValueCountAggregationBuilder(StreamInput in) throws IOException {
super(in, TYPE, ValuesSourceType.ANY);
}
@Override
protected void innerWriteTo(StreamOutput out) {
// Do nothing, no extra state to write to stream
}
@Override
protected boolean serializeTargetValueType() {
return true;
}
@Override
protected ValueCountAggregatorFactory innerBuild(AggregationContext context, ValuesSourceConfig config,
AggregatorFactory parent, AggregatorFactories.Builder subFactoriesBuilder) throws IOException {
return new ValueCountAggregatorFactory(name, type, 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 getWriteableName() {
return NAME;
}
}