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allow to execute term facet on more than one field
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203 changes: 203 additions & 0 deletions
203
...search/src/main/java/org/elasticsearch/search/facets/terms/TermsFieldsFacetCollector.java
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| /* | ||
| * Licensed to Elastic Search and Shay Banon under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Elastic Search 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. | ||
| */ | ||
|
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| package org.elasticsearch.search.facets.terms; | ||
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| import org.apache.lucene.index.IndexReader; | ||
| import org.elasticsearch.common.collect.BoundedTreeSet; | ||
| import org.elasticsearch.common.collect.ImmutableList; | ||
| import org.elasticsearch.common.collect.ImmutableSet; | ||
| import org.elasticsearch.common.collect.Maps; | ||
| import org.elasticsearch.common.trove.TObjectIntHashMap; | ||
| import org.elasticsearch.common.trove.TObjectIntIterator; | ||
| import org.elasticsearch.index.cache.field.data.FieldDataCache; | ||
| import org.elasticsearch.index.field.data.FieldData; | ||
| import org.elasticsearch.index.mapper.MapperService; | ||
| import org.elasticsearch.script.search.SearchScript; | ||
| import org.elasticsearch.search.facets.Facet; | ||
| import org.elasticsearch.search.facets.support.AbstractFacetCollector; | ||
| import org.elasticsearch.search.internal.SearchContext; | ||
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| import java.io.IOException; | ||
| import java.util.Map; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
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| import static org.elasticsearch.common.Strings.*; | ||
|
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| /** | ||
| * @author kimchy (shay.banon) | ||
| */ | ||
| public class TermsFieldsFacetCollector extends AbstractFacetCollector { | ||
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| private final FieldDataCache fieldDataCache; | ||
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| private final String[] fieldsNames; | ||
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| private final String[] indexFieldsNames; | ||
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| private final InternalTermsFacet.ComparatorType comparatorType; | ||
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| private final int size; | ||
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| private final int numberOfShards; | ||
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| private final FieldData.Type[] fieldsDataType; | ||
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| private FieldData[] fieldsData; | ||
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| private final StaticAggregatorValueProc aggregator; | ||
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| private final SearchScript script; | ||
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| public TermsFieldsFacetCollector(String facetName, String[] fieldsNames, int size, InternalTermsFacet.ComparatorType comparatorType, SearchContext context, | ||
| ImmutableSet<String> excluded, Pattern pattern, String scriptLang, String script, Map<String, Object> params) { | ||
| super(facetName); | ||
| this.fieldDataCache = context.fieldDataCache(); | ||
| this.size = size; | ||
| this.comparatorType = comparatorType; | ||
| this.numberOfShards = context.numberOfShards(); | ||
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| this.fieldsNames = fieldsNames; | ||
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| fieldsDataType = new FieldData.Type[fieldsNames.length]; | ||
| fieldsData = new FieldData[fieldsNames.length]; | ||
| indexFieldsNames = new String[fieldsNames.length]; | ||
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| for (int i = 0; i < fieldsNames.length; i++) { | ||
| MapperService.SmartNameFieldMappers smartMappers = context.mapperService().smartName(fieldsNames[i]); | ||
| if (smartMappers == null || !smartMappers.hasMapper()) { | ||
| this.indexFieldsNames[i] = fieldsNames[i]; | ||
| this.fieldsDataType[i] = FieldData.Type.STRING; | ||
| } else { | ||
| this.indexFieldsNames[i] = smartMappers.mapper().names().indexName(); | ||
| this.fieldsDataType[i] = smartMappers.mapper().fieldDataType(); | ||
| } | ||
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| } | ||
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| if (script != null) { | ||
| this.script = new SearchScript(context.scriptSearchLookup(), scriptLang, script, params, context.scriptService()); | ||
| } else { | ||
| this.script = null; | ||
| } | ||
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| if (excluded.isEmpty() && pattern == null && this.script == null) { | ||
| aggregator = new StaticAggregatorValueProc(TermsFacetCollector.popFacets()); | ||
| } else { | ||
| aggregator = new AggregatorValueProc(TermsFacetCollector.popFacets(), excluded, pattern, this.script); | ||
| } | ||
| } | ||
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| @Override protected void doSetNextReader(IndexReader reader, int docBase) throws IOException { | ||
| for (int i = 0; i < fieldsNames.length; i++) { | ||
| fieldsData[i] = fieldDataCache.cache(fieldsDataType[i], reader, indexFieldsNames[i]); | ||
| } | ||
| if (script != null) { | ||
| script.setNextReader(reader); | ||
| } | ||
| } | ||
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| @Override protected void doCollect(int doc) throws IOException { | ||
| for (FieldData fieldData : fieldsData) { | ||
| fieldData.forEachValueInDoc(doc, aggregator); | ||
| } | ||
| } | ||
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| @Override public Facet facet() { | ||
| TObjectIntHashMap<String> facets = aggregator.facets(); | ||
| if (facets.isEmpty()) { | ||
| TermsFacetCollector.pushFacets(facets); | ||
| return new InternalTermsFacet(facetName, arrayToCommaDelimitedString(fieldsNames), comparatorType, size, ImmutableList.<InternalTermsFacet.Entry>of()); | ||
| } else { | ||
| // we need to fetch facets of "size * numberOfShards" because of problems in how they are distributed across shards | ||
| BoundedTreeSet<InternalTermsFacet.Entry> ordered = new BoundedTreeSet<InternalTermsFacet.Entry>(InternalTermsFacet.ComparatorType.COUNT.comparator(), size * numberOfShards); | ||
| for (TObjectIntIterator<String> it = facets.iterator(); it.hasNext();) { | ||
| it.advance(); | ||
| ordered.add(new InternalTermsFacet.Entry(it.key(), it.value())); | ||
| } | ||
| TermsFacetCollector.pushFacets(facets); | ||
| return new InternalTermsFacet(facetName, arrayToCommaDelimitedString(fieldsNames), comparatorType, size, ordered); | ||
| } | ||
| } | ||
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| public static class AggregatorValueProc extends StaticAggregatorValueProc { | ||
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| private final ImmutableSet<String> excluded; | ||
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| private final Matcher matcher; | ||
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| private final SearchScript script; | ||
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| private final Map<String, Object> scriptParams; | ||
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| public AggregatorValueProc(TObjectIntHashMap<String> facets, ImmutableSet<String> excluded, Pattern pattern, SearchScript script) { | ||
| super(facets); | ||
| this.excluded = excluded; | ||
| this.matcher = pattern != null ? pattern.matcher("") : null; | ||
| this.script = script; | ||
| if (script != null) { | ||
| scriptParams = Maps.newHashMapWithExpectedSize(4); | ||
| } else { | ||
| scriptParams = null; | ||
| } | ||
| } | ||
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| @Override public void onValue(int docId, String value) { | ||
| if (excluded != null && excluded.contains(value)) { | ||
| return; | ||
| } | ||
| if (matcher != null && !matcher.reset(value).matches()) { | ||
| return; | ||
| } | ||
| if (script != null) { | ||
| scriptParams.put("term", value); | ||
| Object scriptValue = script.execute(docId, scriptParams); | ||
| if (scriptValue == null) { | ||
| return; | ||
| } | ||
| if (scriptValue instanceof Boolean) { | ||
| if (!((Boolean) scriptValue)) { | ||
| return; | ||
| } | ||
| } else { | ||
| value = scriptValue.toString(); | ||
| } | ||
| } | ||
| super.onValue(docId, value); | ||
| } | ||
| } | ||
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| public static class StaticAggregatorValueProc implements FieldData.StringValueInDocProc { | ||
|
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| private final TObjectIntHashMap<String> facets; | ||
|
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| public StaticAggregatorValueProc(TObjectIntHashMap<String> facets) { | ||
| this.facets = facets; | ||
| } | ||
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| @Override public void onValue(int docId, String value) { | ||
| facets.adjustOrPutValue(value, 1, 1); | ||
| } | ||
|
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| public final TObjectIntHashMap<String> facets() { | ||
| return facets; | ||
| } | ||
| } | ||
| } |
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