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/*
* Licensed to ElasticSearch and Shay Banon 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.query;
import com.google.common.collect.ImmutableMap;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.TotalHitCountCollector;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.search.SearchParseElement;
import org.elasticsearch.search.SearchPhase;
import org.elasticsearch.search.facet.FacetPhase;
import org.elasticsearch.search.internal.ContextIndexSearcher;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.rescore.RescorePhase;
import org.elasticsearch.search.sort.SortParseElement;
import org.elasticsearch.search.sort.TrackScoresParseElement;
import org.elasticsearch.search.suggest.SuggestPhase;
import java.util.List;
import java.util.Map;
/**
*
*/
public class QueryPhase implements SearchPhase {
private final FacetPhase facetPhase;
private final SuggestPhase suggestPhase;
private RescorePhase rescorePhase;
@Inject
public QueryPhase(FacetPhase facetPhase, SuggestPhase suggestPhase, RescorePhase rescorePhase) {
this.facetPhase = facetPhase;
this.suggestPhase = suggestPhase;
this.rescorePhase = rescorePhase;
}
@Override
public Map parseElements() {
ImmutableMap.Builder parseElements = ImmutableMap.builder();
parseElements.put("from", new FromParseElement()).put("size", new SizeParseElement())
.put("indices_boost", new IndicesBoostParseElement())
.put("indicesBoost", new IndicesBoostParseElement())
.put("query", new QueryParseElement())
.put("queryBinary", new QueryBinaryParseElement())
.put("query_binary", new QueryBinaryParseElement())
.put("filter", new FilterParseElement())
.put("filterBinary", new FilterBinaryParseElement())
.put("filter_binary", new FilterBinaryParseElement())
.put("sort", new SortParseElement())
.put("trackScores", new TrackScoresParseElement())
.put("track_scores", new TrackScoresParseElement())
.put("min_score", new MinScoreParseElement())
.put("minScore", new MinScoreParseElement())
.put("timeout", new TimeoutParseElement())
.putAll(facetPhase.parseElements())
.putAll(suggestPhase.parseElements())
.putAll(rescorePhase.parseElements());
return parseElements.build();
}
@Override
public void preProcess(SearchContext context) {
context.preProcess();
facetPhase.preProcess(context);
}
public void execute(SearchContext searchContext) throws QueryPhaseExecutionException {
searchContext.queryResult().searchTimedOut(false);
List rewrites = searchContext.rewrites();
if (rewrites != null) {
try {
searchContext.searcher().inStage(ContextIndexSearcher.Stage.REWRITE);
for (SearchContext.Rewrite rewrite : rewrites) {
rewrite.contextRewrite(searchContext);
}
} catch (Exception e) {
throw new QueryPhaseExecutionException(searchContext, "failed to execute context rewrite", e);
} finally {
searchContext.searcher().finishStage(ContextIndexSearcher.Stage.REWRITE);
}
}
searchContext.searcher().inStage(ContextIndexSearcher.Stage.MAIN_QUERY);
boolean rescore = false;
try {
searchContext.queryResult().from(searchContext.from());
searchContext.queryResult().size(searchContext.size());
Query query = searchContext.query();
TopDocs topDocs;
int numDocs = searchContext.from() + searchContext.size() ;
if (numDocs == 0) {
// if 0 was asked, change it to 1 since 0 is not allowed
numDocs = 1;
}
if (searchContext.searchType() == SearchType.COUNT) {
TotalHitCountCollector collector = new TotalHitCountCollector();
searchContext.searcher().search(query, collector);
topDocs = new TopDocs(collector.getTotalHits(), Lucene.EMPTY_SCORE_DOCS, 0);
} else if (searchContext.searchType() == SearchType.SCAN) {
topDocs = searchContext.scanContext().execute(searchContext);
} else if (searchContext.sort() != null) {
topDocs = searchContext.searcher().search(query, null, numDocs, searchContext.sort(),
searchContext.trackScores(), searchContext.trackScores());
} else {
if (searchContext.rescore() != null) {
rescore = true;
numDocs = Math.max(searchContext.rescore().window(), numDocs);
}
topDocs = searchContext.searcher().search(query, numDocs);
}
searchContext.queryResult().topDocs(topDocs);
} catch (Exception e) {
throw new QueryPhaseExecutionException(searchContext, "Failed to execute main query", e);
} finally {
searchContext.searcher().finishStage(ContextIndexSearcher.Stage.MAIN_QUERY);
}
if (rescore) { // only if we do a regular search
rescorePhase.execute(searchContext);
}
suggestPhase.execute(searchContext);
facetPhase.execute(searchContext);
}
}
