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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.search.aggregations.bucket.histogram;
import org.elasticsearch.search.aggregations.ParsedMultiBucketAggregation;
import org.elasticsearch.xcontent.ObjectParser;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;
import java.io.IOException;
import java.time.Instant;
import java.time.ZoneOffset;
import java.util.List;
public class ParsedDateHistogram extends ParsedMultiBucketAggregation implements Histogram {
@Override
public String getType() {
return DateHistogramAggregationBuilder.NAME;
}
@Override
public List getBuckets() {
return buckets;
}
private static final ObjectParser PARSER = new ObjectParser<>(
ParsedDateHistogram.class.getSimpleName(),
true,
ParsedDateHistogram::new
);
static {
declareMultiBucketAggregationFields(
PARSER,
parser -> ParsedBucket.fromXContent(parser, false),
parser -> ParsedBucket.fromXContent(parser, true)
);
}
public static ParsedDateHistogram fromXContent(XContentParser parser, String name) throws IOException {
ParsedDateHistogram aggregation = PARSER.parse(parser, null);
aggregation.setName(name);
return aggregation;
}
public static class ParsedBucket extends ParsedMultiBucketAggregation.ParsedBucket implements Histogram.Bucket {
private Long key;
@Override
public Object getKey() {
if (key != null) {
return Instant.ofEpochMilli(key).atZone(ZoneOffset.UTC);
}
return null;
}
@Override
public String getKeyAsString() {
String keyAsString = super.getKeyAsString();
if (keyAsString != null) {
return keyAsString;
}
if (key != null) {
return Long.toString(key);
}
return null;
}
@Override
protected XContentBuilder keyToXContent(XContentBuilder builder) throws IOException {
return builder.field(CommonFields.KEY.getPreferredName(), key);
}
static ParsedBucket fromXContent(XContentParser parser, boolean keyed) throws IOException {
return parseXContent(parser, keyed, ParsedBucket::new, (p, bucket) -> bucket.key = p.longValue());
}
}
}