/*
* 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.
*/
package org.elasticsearch.search.fetch.version;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.common.lucene.uid.UidField;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.internal.InternalSearchHit;
import org.elasticsearch.search.internal.SearchContext;
import java.util.Map;
/**
*
*/
public class VersionFetchSubPhase implements FetchSubPhase {
@Override
public Map<String, ? extends SearchParseElement> parseElements() {
return ImmutableMap.of("version", new VersionParseElement());
}
@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.version();
}
@Override
public void hitExecute(SearchContext context, HitContext hitContext) throws ElasticSearchException {
// it might make sense to cache the TermDocs on a shared fetch context and just skip here)
// it is going to mean we work on the high level multi reader and not the lower level reader as is
// the case below...
long version = UidField.loadVersion(hitContext.reader(), UidFieldMapper.TERM_FACTORY.createTerm(hitContext.doc().get(UidFieldMapper.NAME)));
if (version < 0) {
version = -1;
}
hitContext.hit().version(version);
}
}