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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;
import org.elasticsearch.common.xcontent.XContentParserUtils;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.ParsedAggregation;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentParser;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken;
/**
* A base class for all the single bucket aggregations.
*/
public abstract class ParsedSingleBucketAggregation extends ParsedAggregation implements SingleBucketAggregation {
private long docCount;
protected Aggregations aggregations = new Aggregations(Collections.emptyList());
@Override
public long getDocCount() {
return docCount;
}
protected void setDocCount(long docCount) {
this.docCount = docCount;
}
@Override
public Aggregations getAggregations() {
return aggregations;
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
builder.field(CommonFields.DOC_COUNT.getPreferredName(), docCount);
aggregations.toXContentInternal(builder, params);
return builder;
}
protected static T parseXContent(final XContentParser parser, T aggregation, String name)
throws IOException {
aggregation.setName(name);
XContentParser.Token token = parser.currentToken();
String currentFieldName = parser.currentName();
if (token == XContentParser.Token.FIELD_NAME) {
token = parser.nextToken();
}
ensureExpectedToken(XContentParser.Token.START_OBJECT, token, parser);
List aggregations = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if (CommonFields.DOC_COUNT.getPreferredName().equals(currentFieldName)) {
aggregation.setDocCount(parser.longValue());
}
} else if (token == XContentParser.Token.START_OBJECT) {
if (CommonFields.META.getPreferredName().equals(currentFieldName)) {
aggregation.metadata = parser.map();
} else {
XContentParserUtils.parseTypedKeysObject(
parser,
Aggregation.TYPED_KEYS_DELIMITER,
Aggregation.class,
aggregations::add
);
}
}
}
aggregation.aggregations = new Aggregations(aggregations);
return aggregation;
}
}