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org.elasticsearch.index.search.MatchQuery Maven / Gradle / Ivy
Elasticsearch - Open Source, Distributed, RESTful Search Engine
/*
* 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.index.search;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.Term;
import org.apache.lucene.queries.ExtendedCommonTermsQuery;
import org.apache.lucene.search.*;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.util.QueryBuilder;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.ElasticsearchIllegalStateException;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.lucene.search.MultiPhrasePrefixQuery;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.unit.Fuzziness;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.index.query.support.QueryParsers;
import java.io.IOException;
import java.util.List;
import static org.elasticsearch.index.query.support.QueryParsers.wrapSmartNameQuery;
public class MatchQuery {
public static enum Type {
BOOLEAN,
PHRASE,
PHRASE_PREFIX
}
public static enum ZeroTermsQuery {
NONE,
ALL
}
protected final QueryParseContext parseContext;
protected String analyzer;
protected BooleanClause.Occur occur = BooleanClause.Occur.SHOULD;
protected boolean enablePositionIncrements = true;
protected int phraseSlop = 0;
protected Fuzziness fuzziness = null;
protected int fuzzyPrefixLength = FuzzyQuery.defaultPrefixLength;
protected int maxExpansions = FuzzyQuery.defaultMaxExpansions;
//LUCENE 4 UPGRADE we need a default value for this!
protected boolean transpositions = false;
protected MultiTermQuery.RewriteMethod rewriteMethod;
protected MultiTermQuery.RewriteMethod fuzzyRewriteMethod;
protected boolean lenient;
protected ZeroTermsQuery zeroTermsQuery = ZeroTermsQuery.NONE;
protected Float commonTermsCutoff = null;
public MatchQuery(QueryParseContext parseContext) {
this.parseContext = parseContext;
}
public void setAnalyzer(String analyzer) {
this.analyzer = analyzer;
}
public void setOccur(BooleanClause.Occur occur) {
this.occur = occur;
}
public void setCommonTermsCutoff(float cutoff) {
this.commonTermsCutoff = Float.valueOf(cutoff);
}
public void setEnablePositionIncrements(boolean enablePositionIncrements) {
this.enablePositionIncrements = enablePositionIncrements;
}
public void setPhraseSlop(int phraseSlop) {
this.phraseSlop = phraseSlop;
}
public void setFuzziness(Fuzziness fuzziness) {
this.fuzziness = fuzziness;
}
public void setFuzzyPrefixLength(int fuzzyPrefixLength) {
this.fuzzyPrefixLength = fuzzyPrefixLength;
}
public void setMaxExpansions(int maxExpansions) {
this.maxExpansions = maxExpansions;
}
public void setTranspositions(boolean transpositions) {
this.transpositions = transpositions;
}
public void setRewriteMethod(MultiTermQuery.RewriteMethod rewriteMethod) {
this.rewriteMethod = rewriteMethod;
}
public void setFuzzyRewriteMethod(MultiTermQuery.RewriteMethod fuzzyRewriteMethod) {
this.fuzzyRewriteMethod = fuzzyRewriteMethod;
}
public void setLenient(boolean lenient) {
this.lenient = lenient;
}
public void setZeroTermsQuery(ZeroTermsQuery zeroTermsQuery) {
this.zeroTermsQuery = zeroTermsQuery;
}
protected boolean forceAnalyzeQueryString() {
return false;
}
protected Analyzer getAnalyzer(FieldMapper mapper, MapperService.SmartNameFieldMappers smartNameFieldMappers) {
Analyzer analyzer = null;
if (this.analyzer == null) {
if (mapper != null) {
analyzer = mapper.searchAnalyzer();
}
if (analyzer == null && smartNameFieldMappers != null) {
analyzer = smartNameFieldMappers.searchAnalyzer();
}
if (analyzer == null) {
analyzer = parseContext.mapperService().searchAnalyzer();
}
} else {
analyzer = parseContext.mapperService().analysisService().analyzer(this.analyzer);
if (analyzer == null) {
throw new ElasticsearchIllegalArgumentException("No analyzer found for [" + this.analyzer + "]");
}
}
return analyzer;
}
public Query parse(Type type, String fieldName, Object value) throws IOException {
FieldMapper mapper = null;
final String field;
MapperService.SmartNameFieldMappers smartNameFieldMappers = parseContext.smartFieldMappers(fieldName);
if (smartNameFieldMappers != null && smartNameFieldMappers.hasMapper()) {
mapper = smartNameFieldMappers.mapper();
field = mapper.names().indexName();
} else {
field = fieldName;
}
if (mapper != null && mapper.useTermQueryWithQueryString() && !forceAnalyzeQueryString()) {
if (smartNameFieldMappers.explicitTypeInNameWithDocMapper()) {
String[] previousTypes = QueryParseContext.setTypesWithPrevious(new String[]{smartNameFieldMappers.docMapper().type()});
try {
return wrapSmartNameQuery(mapper.termQuery(value, parseContext), smartNameFieldMappers, parseContext);
} catch (RuntimeException e) {
if (lenient) {
return null;
}
throw e;
} finally {
QueryParseContext.setTypes(previousTypes);
}
} else {
try {
return wrapSmartNameQuery(mapper.termQuery(value, parseContext), smartNameFieldMappers, parseContext);
} catch (RuntimeException e) {
if (lenient) {
return null;
}
throw e;
}
}
}
Analyzer analyzer = getAnalyzer(mapper, smartNameFieldMappers);
MatchQueryBuilder builder = new MatchQueryBuilder(analyzer, mapper);
builder.setEnablePositionIncrements(this.enablePositionIncrements);
Query query = null;
switch (type) {
case BOOLEAN:
if (commonTermsCutoff == null) {
query = builder.createBooleanQuery(field, value.toString(), occur);
} else {
query = builder.createCommonTermsQuery(field, value.toString(), occur, occur, commonTermsCutoff, mapper);
}
break;
case PHRASE:
query = builder.createPhraseQuery(field, value.toString(), phraseSlop);
break;
case PHRASE_PREFIX:
query = builder.createPhrasePrefixQuery(field, value.toString(), phraseSlop, maxExpansions);
break;
default:
throw new ElasticsearchIllegalStateException("No type found for [" + type + "]");
}
if (query == null) {
return zeroTermsQuery();
} else {
return wrapSmartNameQuery(query, smartNameFieldMappers, parseContext);
}
}
protected Query zeroTermsQuery() {
return zeroTermsQuery == ZeroTermsQuery.NONE ? Queries.newMatchNoDocsQuery() : Queries.newMatchAllQuery();
}
private class MatchQueryBuilder extends QueryBuilder {
private final FieldMapper mapper;
/**
* Creates a new QueryBuilder using the given analyzer.
*/
public MatchQueryBuilder(Analyzer analyzer, @Nullable FieldMapper mapper) {
super(analyzer);
this.mapper = mapper;
}
@Override
protected Query newTermQuery(Term term) {
return blendTermQuery(term, mapper);
}
public Query createPhrasePrefixQuery(String field, String queryText, int phraseSlop, int maxExpansions) {
final Query query = createFieldQuery(getAnalyzer(), Occur.MUST, field, queryText, true, phraseSlop);
final MultiPhrasePrefixQuery prefixQuery = new MultiPhrasePrefixQuery();
prefixQuery.setMaxExpansions(maxExpansions);
prefixQuery.setSlop(phraseSlop);
if (query instanceof PhraseQuery) {
PhraseQuery pq = (PhraseQuery)query;
Term[] terms = pq.getTerms();
int[] positions = pq.getPositions();
for (int i = 0; i < terms.length; i++) {
prefixQuery.add(new Term[] {terms[i]}, positions[i]);
}
return prefixQuery;
} else if (query instanceof MultiPhraseQuery) {
MultiPhraseQuery pq = (MultiPhraseQuery)query;
List terms = pq.getTermArrays();
int[] positions = pq.getPositions();
for (int i = 0; i < terms.size(); i++) {
prefixQuery.add(terms.get(i), positions[i]);
}
return prefixQuery;
} else if (query instanceof TermQuery) {
prefixQuery.add(((TermQuery) query).getTerm());
return prefixQuery;
}
return query;
}
public Query createCommonTermsQuery(String field, String queryText, Occur highFreqOccur, Occur lowFreqOccur, float maxTermFrequency, FieldMapper mapper) {
Query booleanQuery = createBooleanQuery(field, queryText, lowFreqOccur);
if (booleanQuery != null && booleanQuery instanceof BooleanQuery) {
BooleanQuery bq = (BooleanQuery) booleanQuery;
ExtendedCommonTermsQuery query = new ExtendedCommonTermsQuery(highFreqOccur, lowFreqOccur, maxTermFrequency, ((BooleanQuery)booleanQuery).isCoordDisabled(), mapper);
for (BooleanClause clause : bq.clauses()) {
if (!(clause.getQuery() instanceof TermQuery)) {
return booleanQuery;
}
query.add(((TermQuery) clause.getQuery()).getTerm());
}
return query;
}
return booleanQuery;
}
}
protected Query blendTermQuery(Term term, FieldMapper mapper) {
if (fuzziness != null) {
if (mapper != null) {
Query query = mapper.fuzzyQuery(term.text(), fuzziness, fuzzyPrefixLength, maxExpansions, transpositions);
if (query instanceof FuzzyQuery) {
QueryParsers.setRewriteMethod((FuzzyQuery) query, fuzzyRewriteMethod);
}
}
int edits = fuzziness.asDistance(term.text());
FuzzyQuery query = new FuzzyQuery(term, edits, fuzzyPrefixLength, maxExpansions, transpositions);
QueryParsers.setRewriteMethod(query, rewriteMethod);
return query;
}
if (mapper != null) {
Query termQuery = mapper.queryStringTermQuery(term);
if (termQuery != null) {
return termQuery;
}
}
return new TermQuery(term);
}
}
