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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.pipeline.bucketmetrics.stats;
import org.elasticsearch.common.ParseField;
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.AggregatorFactory;
import org.elasticsearch.search.aggregations.PipelineAggregationBuilder;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator.Parser;
import org.elasticsearch.search.aggregations.pipeline.bucketmetrics.BucketMetricsParser;
import org.elasticsearch.search.aggregations.pipeline.bucketmetrics.BucketMetricsPipelineAggregationBuilder;
import java.io.IOException;
import java.util.List;
import java.util.Map;
public class StatsBucketPipelineAggregationBuilder extends BucketMetricsPipelineAggregationBuilder<StatsBucketPipelineAggregationBuilder> {
public static final String NAME = "stats_bucket";
public static final ParseField AGGREGATION_NAME_FIELD = new ParseField(NAME);
public StatsBucketPipelineAggregationBuilder(String name, String bucketsPath) {
super(name, NAME, new String[] { bucketsPath });
}
/**
* Read from a stream.
*/
public StatsBucketPipelineAggregationBuilder(StreamInput in)
throws IOException {
super(in, NAME);
}
@Override
protected void innerWriteTo(StreamOutput out) throws IOException {
// Do nothing, no extra state to write to stream
}
@Override
protected PipelineAggregator createInternal(Map<String, Object> metaData) throws IOException {
return new StatsBucketPipelineAggregator(name, bucketsPaths, gapPolicy(), formatter(), metaData);
}
@Override
public void doValidate(AggregatorFactory<?> parent, AggregatorFactory<?>[] aggFactories,
List<PipelineAggregationBuilder> pipelineAggregatorFactories) {
if (bucketsPaths.length != 1) {
throw new IllegalStateException(Parser.BUCKETS_PATH.getPreferredName()
+ " must contain a single entry for aggregation [" + name + "]");
}
}
@Override
protected XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
return builder;
}
public static final PipelineAggregator.Parser PARSER = new BucketMetricsParser() {
@Override
protected StatsBucketPipelineAggregationBuilder buildFactory(String pipelineAggregatorName,
String bucketsPath, Map<String, Object> params) {
return new StatsBucketPipelineAggregationBuilder(pipelineAggregatorName, bucketsPath);
}
};
@Override
protected int innerHashCode() {
return 0;
}
@Override
protected boolean innerEquals(BucketMetricsPipelineAggregationBuilder<StatsBucketPipelineAggregationBuilder> other) {
return true;
}
@Override
public String getWriteableName() {
return NAME;
}
}
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