001/*
002 * (C) Copyright 2014-2016 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 java.util.ArrayList;
022import java.util.Collection;
023import java.util.Collections;
024import java.util.Comparator;
025import java.util.List;
026
027import org.codehaus.jackson.annotate.JsonIgnore;
028import org.elasticsearch.index.query.BoolQueryBuilder;
029import org.elasticsearch.index.query.QueryBuilder;
030import org.elasticsearch.index.query.QueryBuilders;
031import org.elasticsearch.index.query.RangeQueryBuilder;
032import org.elasticsearch.search.aggregations.AggregationBuilders;
033import org.elasticsearch.search.aggregations.bucket.MultiBucketsAggregation;
034import org.elasticsearch.search.aggregations.bucket.range.Range;
035import org.elasticsearch.search.aggregations.bucket.range.RangeBuilder;
036import org.nuxeo.ecm.core.api.DocumentModel;
037import org.nuxeo.ecm.platform.query.api.AggregateDefinition;
038import org.nuxeo.ecm.platform.query.api.AggregateRangeDefinition;
039import org.nuxeo.ecm.platform.query.core.BucketRange;
040
041/**
042 * @since 6.0
043 */
044public class RangeAggregate extends AggregateEsBase<BucketRange> {
045
046    public RangeAggregate(AggregateDefinition definition, DocumentModel searchDocument) {
047        super(definition, searchDocument);
048    }
049
050    @JsonIgnore
051    @Override
052    public RangeBuilder getEsAggregate() {
053        RangeBuilder ret = AggregationBuilders.range(getId()).field(getField());
054        for (AggregateRangeDefinition range : getRanges()) {
055            if (range.getFrom() != null) {
056                if (range.getTo() != null) {
057                    ret.addRange(range.getKey(), range.getFrom(), range.getTo());
058                } else {
059                    ret.addUnboundedFrom(range.getKey(), range.getFrom());
060                }
061            } else if (range.getTo() != null) {
062                ret.addUnboundedTo(range.getKey(), range.getTo());
063            }
064        }
065        return ret;
066    }
067
068    @JsonIgnore
069    @Override
070    public QueryBuilder getEsFilter() {
071        if (getSelection().isEmpty()) {
072            return null;
073        }
074        BoolQueryBuilder ret = QueryBuilders.boolQuery();
075        for (AggregateRangeDefinition range : getRanges()) {
076            if (getSelection().contains(range.getKey())) {
077                RangeQueryBuilder rangeFilter = QueryBuilders.rangeQuery(getField());
078                if (range.getFrom() != null) {
079                    rangeFilter.gte(range.getFrom());
080                }
081                if (range.getTo() != null) {
082                    rangeFilter.lt(range.getTo());
083                }
084                ret.should(rangeFilter);
085            }
086        }
087        return ret;
088    }
089
090    @JsonIgnore
091    @Override
092    public void parseEsBuckets(Collection<? extends MultiBucketsAggregation.Bucket> buckets) {
093        List<BucketRange> nxBuckets = new ArrayList<>(buckets.size());
094        for (MultiBucketsAggregation.Bucket bucket : buckets) {
095            Range.Bucket rangeBucket = (Range.Bucket) bucket;
096            double from = (double) rangeBucket.getFrom();
097            double to = (double) rangeBucket.getTo();
098            nxBuckets.add(new BucketRange(bucket.getKeyAsString(), from, to, rangeBucket.getDocCount()));
099        }
100        Collections.sort(nxBuckets, new BucketRangeComparator());
101        this.buckets = nxBuckets;
102    }
103
104    protected class BucketRangeComparator implements Comparator<BucketRange> {
105        @Override
106        public int compare(BucketRange arg0, BucketRange arg1) {
107            return definition.getAggregateRangeDefinitionOrderMap().get(arg0.getKey()).compareTo(
108                    definition.getAggregateRangeDefinitionOrderMap().get(arg1.getKey()));
109        }
110    }
111
112}