org.elasticsearch.search.aggregations.bucket.ParsedSingleBucketAggregation Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.bucket;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
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 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::getTokenLocation);
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;
}
}