001/*
002 * (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bdelbosc
018 */
019package org.nuxeo.elasticsearch.aggregate;
020
021import static org.nuxeo.elasticsearch.ElasticSearchConstants.AGG_MIN_DOC_COUNT_PROP;
022import static org.nuxeo.elasticsearch.ElasticSearchConstants.AGG_SIZE_PROP;
023
024import java.util.ArrayList;
025import java.util.Collection;
026import java.util.List;
027import java.util.Map;
028
029import org.elasticsearch.index.query.QueryBuilder;
030import org.elasticsearch.index.query.QueryBuilders;
031import org.elasticsearch.search.aggregations.AggregationBuilders;
032import org.elasticsearch.search.aggregations.bucket.MultiBucketsAggregation;
033import org.elasticsearch.search.aggregations.bucket.significant.SignificantTermsAggregationBuilder;
034import org.nuxeo.ecm.core.api.DocumentModel;
035import org.nuxeo.ecm.platform.query.api.AggregateDefinition;
036import org.nuxeo.ecm.platform.query.core.BucketTerm;
037
038import com.fasterxml.jackson.annotation.JsonIgnore;
039
040/**
041 * @since 6.0
042 */
043public class SignificantTermAggregate extends AggregateEsBase<BucketTerm> {
044
045    public SignificantTermAggregate(AggregateDefinition definition, DocumentModel searchDocument) {
046        super(definition, searchDocument);
047    }
048
049    @JsonIgnore
050    @Override
051    public SignificantTermsAggregationBuilder getEsAggregate() {
052        SignificantTermsAggregationBuilder ret = AggregationBuilders.significantTerms(getId()).field(getField());
053        Map<String, String> props = getProperties();
054        if (props.containsKey(AGG_SIZE_PROP)) {
055            ret.size(getAggSize(props.get(AGG_SIZE_PROP)));
056        }
057        if (props.containsKey(AGG_MIN_DOC_COUNT_PROP)) {
058            ret.minDocCount(Integer.parseInt(props.get(AGG_MIN_DOC_COUNT_PROP)));
059        }
060        return ret;
061    }
062
063    @JsonIgnore
064    @Override
065    public QueryBuilder getEsFilter() {
066        if (getSelection().isEmpty()) {
067            return null;
068        }
069        return QueryBuilders.termsQuery(getField(), getSelection());
070    }
071
072    @JsonIgnore
073    @Override
074    public void parseEsBuckets(Collection<? extends MultiBucketsAggregation.Bucket> buckets) {
075        List<BucketTerm> nxBuckets = new ArrayList<>(buckets.size());
076        for (MultiBucketsAggregation.Bucket bucket : buckets) {
077            nxBuckets.add(new BucketTerm(bucket.getKeyAsString(), bucket.getDocCount()));
078        }
079        this.buckets = nxBuckets;
080    }
081
082}