/*
* 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.fetch.fielddata;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.index.fielddata.AtomicFieldData;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.search.SearchHitField;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.internal.InternalSearchHit;
import org.elasticsearch.search.internal.InternalSearchHitField;
import org.elasticsearch.search.internal.SearchContext;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* Query sub phase which pulls data from field data (using the cache if
* available, building it if not).
*
* Specifying {@code "fielddata_fields": ["field1", "field2"]}
*/
public class FieldDataFieldsFetchSubPhase implements FetchSubPhase {
@Inject
public FieldDataFieldsFetchSubPhase() {
}
@Override
public Map<String, ? extends SearchParseElement> parseElements() {
ImmutableMap.Builder<String, SearchParseElement> parseElements = ImmutableMap.builder();
parseElements.put("fielddata_fields", new FieldDataFieldsParseElement())
.put("fielddataFields", new FieldDataFieldsParseElement());
return parseElements.build();
}
@Override
public boolean hitsExecutionNeeded(SearchContext context) {
return false;
}
@Override
public void hitsExecute(SearchContext context, InternalSearchHit[] hits) throws ElasticsearchException {
}
@Override
public boolean hitExecutionNeeded(SearchContext context) {
return context.hasFieldDataFields();
}
@Override
public void hitExecute(SearchContext context, HitContext hitContext) throws ElasticsearchException {
for (FieldDataFieldsContext.FieldDataField field : context.fieldDataFields().fields()) {
if (hitContext.hit().fieldsOrNull() == null) {
hitContext.hit().fields(new HashMap<String, SearchHitField>(2));
}
SearchHitField hitField = hitContext.hit().fields().get(field.name());
if (hitField == null) {
hitField = new InternalSearchHitField(field.name(), new ArrayList<>(2));
hitContext.hit().fields().put(field.name(), hitField);
}
FieldMapper mapper = context.mapperService().smartNameFieldMapper(field.name());
if (mapper != null) {
AtomicFieldData data = context.fieldData().getForField(mapper).load(hitContext.readerContext());
ScriptDocValues values = data.getScriptValues();
values.setNextDocId(hitContext.docId());
hitField.values().addAll(values.getValues());
}
}
}
}