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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.bucket.significant;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParseFieldMatcher;
import org.elasticsearch.common.xcontent.ParseFieldRegistry;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentParser.Token;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.indices.query.IndicesQueriesRegistry;
import org.elasticsearch.search.aggregations.Aggregator.SubAggCollectionMode;
import org.elasticsearch.search.aggregations.bucket.significant.heuristics.SignificanceHeuristic;
import org.elasticsearch.search.aggregations.bucket.significant.heuristics.SignificanceHeuristicParser;
import org.elasticsearch.search.aggregations.bucket.terms.AbstractTermsParser;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregator;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregator.BucketCountThresholds;
import org.elasticsearch.search.aggregations.bucket.terms.support.IncludeExclude;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.search.aggregations.support.ValuesSourceType;
import java.io.IOException;
import java.util.Map;
/**
*
*/
public class SignificantTermsParser extends AbstractTermsParser {
private final ParseFieldRegistry<SignificanceHeuristicParser> significanceHeuristicParserRegistry;
private final IndicesQueriesRegistry queriesRegistry;
public SignificantTermsParser(ParseFieldRegistry<SignificanceHeuristicParser> significanceHeuristicParserRegistry,
IndicesQueriesRegistry queriesRegistry) {
this.significanceHeuristicParserRegistry = significanceHeuristicParserRegistry;
this.queriesRegistry = queriesRegistry;
}
@Override
protected SignificantTermsAggregatorBuilder doCreateFactory(String aggregationName, ValuesSourceType valuesSourceType,
ValueType targetValueType, BucketCountThresholds bucketCountThresholds, SubAggCollectionMode collectMode, String executionHint,
IncludeExclude incExc, Map<ParseField, Object> otherOptions) {
SignificantTermsAggregatorBuilder factory = new SignificantTermsAggregatorBuilder(aggregationName, targetValueType);
if (bucketCountThresholds != null) {
factory.bucketCountThresholds(bucketCountThresholds);
}
if (executionHint != null) {
factory.executionHint(executionHint);
}
if (incExc != null) {
factory.includeExclude(incExc);
}
QueryBuilder backgroundFilter = (QueryBuilder) otherOptions.get(SignificantTermsAggregatorBuilder.BACKGROUND_FILTER);
if (backgroundFilter != null) {
factory.backgroundFilter(backgroundFilter);
}
SignificanceHeuristic significanceHeuristic = (SignificanceHeuristic) otherOptions.get(SignificantTermsAggregatorBuilder.HEURISTIC);
if (significanceHeuristic != null) {
factory.significanceHeuristic(significanceHeuristic);
}
return factory;
}
@Override
public boolean parseSpecial(String aggregationName, XContentParser parser, ParseFieldMatcher parseFieldMatcher, Token token,
String currentFieldName, Map<ParseField, Object> otherOptions) throws IOException {
if (token == XContentParser.Token.START_OBJECT) {
SignificanceHeuristicParser significanceHeuristicParser = significanceHeuristicParserRegistry
.lookupReturningNullIfNotFound(currentFieldName, parseFieldMatcher);
if (significanceHeuristicParser != null) {
SignificanceHeuristic significanceHeuristic = significanceHeuristicParser.parse(parser, parseFieldMatcher);
otherOptions.put(SignificantTermsAggregatorBuilder.HEURISTIC, significanceHeuristic);
return true;
} else if (parseFieldMatcher.match(currentFieldName, SignificantTermsAggregatorBuilder.BACKGROUND_FILTER)) {
QueryParseContext queryParseContext = new QueryParseContext(queriesRegistry, parser, parseFieldMatcher);
QueryBuilder filter = queryParseContext.parseInnerQueryBuilder();
otherOptions.put(SignificantTermsAggregatorBuilder.BACKGROUND_FILTER, filter);
return true;
}
}
return false;
}
@Override
protected BucketCountThresholds getDefaultBucketCountThresholds() {
return new TermsAggregator.BucketCountThresholds(SignificantTermsAggregatorBuilder.DEFAULT_BUCKET_COUNT_THRESHOLDS);
}
}
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