org.elasticsearch.search.facet.terms.strings.FieldsTermsStringFacetExecutor Maven / Gradle / Ivy
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* 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.facet.terms.strings;
import com.google.common.collect.ImmutableSet;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.index.fielddata.BytesValues;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.script.SearchScript;
import org.elasticsearch.search.facet.FacetExecutor;
import org.elasticsearch.search.facet.InternalFacet;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.regex.Pattern;
/**
*
*/
public class FieldsTermsStringFacetExecutor extends FacetExecutor {
private final InternalStringTermsFacet.ComparatorType comparatorType;
private final int size;
private final int shardSize;
private final IndexFieldData[] indexFieldDatas;
private final SearchScript script;
private final HashedAggregator aggregator;
long missing;
long total;
public FieldsTermsStringFacetExecutor(FieldMapper[] fieldMappers, int size, int shardSize, InternalStringTermsFacet.ComparatorType comparatorType,
boolean allTerms, SearchContext context, ImmutableSet excluded, Pattern pattern, SearchScript script) {
this.size = size;
this.shardSize = shardSize;
this.comparatorType = comparatorType;
this.script = script;
this.indexFieldDatas = new IndexFieldData[fieldMappers.length];
for (int i = 0; i < fieldMappers.length; i++) {
FieldMapper mapper = fieldMappers[i];
indexFieldDatas[i] = context.fieldData().getForField(mapper);
}
if (excluded.isEmpty() && pattern == null && script == null) {
aggregator = new HashedAggregator();
} else {
aggregator = new HashedScriptAggregator(excluded, pattern, script);
}
if (allTerms) {
for (int i = 0; i < fieldMappers.length; i++) {
TermsStringFacetExecutor.loadAllTerms(context, indexFieldDatas[i], aggregator);
}
}
}
@Override
public Collector collector() {
return new Collector(aggregator);
}
@Override
public InternalFacet buildFacet(String facetName) {
try {
return HashedAggregator.buildFacet(facetName, size, shardSize, missing, total, comparatorType, aggregator);
} finally {
aggregator.release();
}
}
class Collector extends FacetExecutor.Collector {
private final HashedAggregator aggregator;
private BytesValues[] values;
public Collector(HashedAggregator aggregator) {
values = new BytesValues[indexFieldDatas.length];
this.aggregator = aggregator;
}
@Override
public void setScorer(Scorer scorer) throws IOException {
if (script != null) {
script.setScorer(scorer);
}
}
@Override
public void setNextReader(AtomicReaderContext context) throws IOException {
for (int i = 0; i < indexFieldDatas.length; i++) {
values[i] = indexFieldDatas[i].load(context).getBytesValues(true);
}
if (script != null) {
script.setNextReader(context);
}
}
@Override
public void collect(int doc) throws IOException {
for (int i = 0; i < values.length; i++) {
aggregator.onDoc(doc, values[i]);
}
}
@Override
public void postCollection() {
FieldsTermsStringFacetExecutor.this.missing = aggregator.missing();
FieldsTermsStringFacetExecutor.this.total = aggregator.total();
}
}
}