org.apache.lucene.queryParser.CompassQueryParser Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of compass Show documentation
Show all versions of compass Show documentation
Compass Search Engine Framework
/*
* Copyright 2004-2009 the original author or authors.
*
* Licensed 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.apache.lucene.queryParser;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.KeywordAnalyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.ConstantScoreRangeQuery;
import org.apache.lucene.search.MultiPhraseQuery;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.Query;
import org.compass.core.Property;
import org.compass.core.engine.SearchEngineFactory;
import org.compass.core.lucene.engine.LuceneSearchEngineFactory;
import org.compass.core.lucene.engine.all.AllBoostingTermQuery;
import org.compass.core.lucene.engine.queryparser.QueryParserUtils;
import org.compass.core.lucene.search.ConstantScorePrefixQuery;
import org.compass.core.mapping.CompassMapping;
import org.compass.core.mapping.ResourcePropertyLookup;
/**
* Extends Lucene {@link org.apache.lucene.queryParser.QueryParser} and overrides {@link #getRangeQuery(String,String,String,boolean)}
* since lucene performs data parsing which is a performance killer. Anyhow, handling dates in Compass
* is different and simpler than Lucene.
*
* @author kimchy
*/
public class CompassQueryParser extends QueryParser {
private static final KeywordAnalyzer KEYWORD_ANALYZER = new KeywordAnalyzer();
protected final CompassMapping mapping;
protected final LuceneSearchEngineFactory searchEngineFactory;
private boolean allowConstantScorePrefixQuery;
private boolean addAliasQueryWithDotPath = true;
private boolean forceAnalyzer;
protected boolean suggestedQuery = false;
public CompassQueryParser(String f, Analyzer a, CompassMapping mapping, SearchEngineFactory searchEngineFactory, boolean forceAnalyzer) {
super(f, a);
this.mapping = mapping;
this.searchEngineFactory = (LuceneSearchEngineFactory) searchEngineFactory;
this.forceAnalyzer = forceAnalyzer;
}
public void setAllowConstantScorePrefixQuery(boolean allowConstantScorePrefixQuery) {
this.allowConstantScorePrefixQuery = allowConstantScorePrefixQuery;
}
public void setAddAliasQueryWithDotPath(boolean addAliasQueryWithDotPath) {
this.addAliasQueryWithDotPath = addAliasQueryWithDotPath;
}
protected Query getWildcardQuery(String field, String termStr) throws ParseException {
ResourcePropertyLookup lookup = null;
if (field != null) {
lookup = mapping.getResourcePropertyLookup(field);
lookup.setConvertOnlyWithDotPath(false);
field = lookup.getPath();
}
return QueryParserUtils.andAliasQueryIfNeeded(super.getWildcardQuery(field, termStr), lookup, addAliasQueryWithDotPath, searchEngineFactory);
}
protected Query getFuzzyQuery(String field, String termStr, float minSimilarity) throws ParseException {
ResourcePropertyLookup lookup = null;
if (field != null) {
lookup = mapping.getResourcePropertyLookup(field);
lookup.setConvertOnlyWithDotPath(false);
field = lookup.getPath();
}
return QueryParserUtils.andAliasQueryIfNeeded(super.getFuzzyQuery(field, termStr, minSimilarity), lookup, addAliasQueryWithDotPath, searchEngineFactory);
}
protected Query getFieldQuery(String field, String queryText) throws ParseException {
if (field == null) {
return super.getFieldQuery(field, queryText);
}
if (searchEngineFactory.getAliasProperty().equals(field)) {
return QueryParserUtils.createPolyAliasQuery(searchEngineFactory, queryText);
}
ResourcePropertyLookup lookup = mapping.getResourcePropertyLookup(field);
lookup.setConvertOnlyWithDotPath(false);
if (lookup.hasSpecificConverter()) {
queryText = lookup.attemptNormalizeString(queryText);
}
Analyzer origAnalyzer = analyzer;
if (!forceAnalyzer) {
String analyzerName = lookup.getAnalyzer();
if (analyzerName != null) {
analyzer = searchEngineFactory.getAnalyzerManager().getAnalyzerMustExist(analyzerName);
} else {
if (lookup.getResourcePropertyMapping() != null &&
(lookup.getResourcePropertyMapping().getIndex() == Property.Index.UN_TOKENIZED || lookup.getResourcePropertyMapping().getIndex() == Property.Index.NOT_ANALYZED)) {
analyzer = KEYWORD_ANALYZER;
}
}
}
try {
return QueryParserUtils.andAliasQueryIfNeeded(getInternalFieldQuery(lookup.getPath(), queryText), lookup, addAliasQueryWithDotPath, searchEngineFactory);
} finally {
if (origAnalyzer != null) {
analyzer = origAnalyzer;
}
}
}
/**
* Override it so we won't use the date format to try and parse dates
*/
protected Query getRangeQuery(String field, String part1, String part2, boolean inclusive) throws ParseException {
if (getLowercaseExpandedTerms()) {
part1 = part1.toLowerCase();
part2 = part2.toLowerCase();
}
ResourcePropertyLookup lookup = mapping.getResourcePropertyLookup(field);
lookup.setConvertOnlyWithDotPath(false);
if (lookup.hasSpecificConverter()) {
if ("*".equals(part1)) {
part1 = null;
} else {
part1 = lookup.attemptNormalizeString(part1);
}
if ("*".equals(part2)) {
part2 = null;
} else {
part2 = lookup.attemptNormalizeString(part2);
}
} else {
if ("*".equals(part1)) {
part1 = null;
}
if ("*".equals(part2)) {
part2 = null;
}
}
return QueryParserUtils.andAliasQueryIfNeeded(new ConstantScoreRangeQuery(lookup.getPath(), part1, part2, inclusive, inclusive), lookup, addAliasQueryWithDotPath, searchEngineFactory);
}
protected Query getPrefixQuery(String field, String termStr) throws ParseException {
ResourcePropertyLookup lookup = mapping.getResourcePropertyLookup(field);
lookup.setConvertOnlyWithDotPath(false);
if (!allowConstantScorePrefixQuery) {
return super.getPrefixQuery(lookup.getPath(), termStr);
}
if (getLowercaseExpandedTerms()) {
termStr = termStr.toLowerCase();
}
Term t = new Term(lookup.getPath(), termStr);
return QueryParserUtils.andAliasQueryIfNeeded(new ConstantScorePrefixQuery(t), lookup, addAliasQueryWithDotPath, searchEngineFactory);
}
// LUCENE MONITOR
// Changed: Added boostAll flag
// Extracted the creation of Terms to allow for overrides
protected Query getInternalFieldQuery(String field, String queryText) throws ParseException {
boolean boostAll = false;
if (searchEngineFactory.getLuceneSettings().isAllPropertyBoostSupport() &&
field.equals(searchEngineFactory.getLuceneSettings().getAllProperty())) {
boostAll = true;
}
// Use the analyzer to get all the tokens, and then build a TermQuery,
// PhraseQuery, or nothing based on the term count
TokenStream source = analyzer.tokenStream(field, new StringReader(queryText));
List list = new ArrayList();
final org.apache.lucene.analysis.Token reusableToken = new org.apache.lucene.analysis.Token();
org.apache.lucene.analysis.Token nextToken;
int positionCount = 0;
boolean severalTokensAtSamePosition = false;
while (true) {
try {
nextToken = source.next(reusableToken);
}
catch (IOException e) {
nextToken = null;
}
if (nextToken == null)
break;
list.add(nextToken.clone());
if (nextToken.getPositionIncrement() != 0)
positionCount += nextToken.getPositionIncrement();
else
severalTokensAtSamePosition = true;
}
try {
source.close();
}
catch (IOException e) {
// ignore
}
if (list.size() == 0)
return null;
else if (list.size() == 1) {
nextToken = (org.apache.lucene.analysis.Token) list.get(0);
if (boostAll) {
return new AllBoostingTermQuery(getTerm(field, nextToken.term()));
} else {
return newTermQuery(getTerm(field, nextToken.term()));
}
} else {
if (severalTokensAtSamePosition) {
if (positionCount == 1) {
// no phrase query:
BooleanQuery q = newBooleanQuery(true);
for (int i = 0; i < list.size(); i++) {
nextToken = (org.apache.lucene.analysis.Token) list.get(i);
if (boostAll) {
AllBoostingTermQuery currentQuery = new AllBoostingTermQuery(
getTerm(field, nextToken.term()));
q.add(currentQuery, BooleanClause.Occur.SHOULD);
} else {
Query currentQuery = newTermQuery(
getTerm(field, nextToken.term()));
q.add(currentQuery, BooleanClause.Occur.SHOULD);
}
}
return q;
}
else {
// phrase query:
MultiPhraseQuery mpq = newMultiPhraseQuery();
mpq.setSlop(phraseSlop);
List multiTerms = new ArrayList();
int position = -1;
for (int i = 0; i < list.size(); i++) {
nextToken = (org.apache.lucene.analysis.Token) list.get(i);
if (nextToken.getPositionIncrement() > 0 && multiTerms.size() > 0) {
if (enablePositionIncrements) {
mpq.add((Term[])multiTerms.toArray(new Term[0]),position);
} else {
mpq.add((Term[])multiTerms.toArray(new Term[0]));
}
multiTerms.clear();
}
position += nextToken.getPositionIncrement();
multiTerms.add(getTerm(field, nextToken.term()));
}
if (enablePositionIncrements) {
mpq.add((Term[])multiTerms.toArray(new Term[0]),position);
} else {
mpq.add((Term[])multiTerms.toArray(new Term[0]));
}
return mpq;
}
}
else {
PhraseQuery pq = newPhraseQuery();
pq.setSlop(phraseSlop);
int position = -1;
for (int i = 0; i < list.size(); i++) {
nextToken = (org.apache.lucene.analysis.Token) list.get(i);
if (enablePositionIncrements) {
position += nextToken.getPositionIncrement();
pq.add(getTerm(field, nextToken.term()),position);
} else {
pq.add(getTerm(field, nextToken.term()));
}
}
return pq;
}
}
}
protected Term getTerm(String field, String text) throws ParseException {
return new Term(field, text);
}
public void close() {
}
public boolean isSuggestedQuery() {
return suggestedQuery;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy