001: /*
002: * Copyright 2004-2006 the original author or authors.
003: *
004: * Licensed under the Apache License, Version 2.0 (the "License");
005: * you may not use this file except in compliance with the License.
006: * You may obtain a copy of the License at
007: *
008: * http://www.apache.org/licenses/LICENSE-2.0
009: *
010: * Unless required by applicable law or agreed to in writing, software
011: * distributed under the License is distributed on an "AS IS" BASIS,
012: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013: * See the License for the specific language governing permissions and
014: * limitations under the License.
015: */
016:
017: package org.compass.core.lucene.engine.queryparser;
018:
019: import java.util.HashMap;
020: import java.util.Map;
021:
022: import org.apache.commons.logging.Log;
023: import org.apache.commons.logging.LogFactory;
024: import org.compass.core.CompassException;
025: import org.compass.core.config.CompassConfigurable;
026: import org.compass.core.config.CompassMappingAware;
027: import org.compass.core.config.CompassSettings;
028: import org.compass.core.config.ConfigurationException;
029: import org.compass.core.config.SearchEngineFactoryAware;
030: import org.compass.core.lucene.LuceneEnvironment;
031: import org.compass.core.lucene.engine.LuceneSearchEngineFactory;
032: import org.compass.core.lucene.engine.spellcheck.queryparser.SpellCheckLuceneQueryParser;
033: import org.compass.core.util.ClassUtils;
034:
035: /**
036: * @author kimchy
037: */
038: public class LuceneQueryParserManager implements CompassConfigurable {
039:
040: private static final Log log = LogFactory
041: .getLog(LuceneQueryParserManager.class);
042:
043: private HashMap<String, LuceneQueryParser> queryParsers = new HashMap<String, LuceneQueryParser>();
044:
045: private LuceneSearchEngineFactory searchEngineFactory;
046:
047: public LuceneQueryParserManager(
048: LuceneSearchEngineFactory searchEngineFactory) {
049: this .searchEngineFactory = searchEngineFactory;
050: }
051:
052: public void configure(CompassSettings settings)
053: throws CompassException {
054: CompassSettings defaultGroupSettings = null;
055: Map<String, CompassSettings> queryParserSettingGroups = settings
056: .getSettingGroups(LuceneEnvironment.QueryParser.PREFIX);
057: for (Map.Entry<String, CompassSettings> entry : queryParserSettingGroups
058: .entrySet()) {
059: String queryParserName = entry.getKey();
060: CompassSettings queryParserSettings = entry.getValue();
061:
062: if (log.isDebugEnabled()) {
063: log.debug("Building query parser [" + queryParserName
064: + "] with settings " + queryParserSettings);
065: }
066:
067: if (queryParserName
068: .equals(LuceneEnvironment.QueryParser.DEFAULT_GROUP)) {
069: defaultGroupSettings = queryParserSettings;
070: }
071:
072: String queryParserType = queryParserSettings
073: .getSetting(LuceneEnvironment.QueryParser.TYPE);
074: if (queryParserType == null) {
075: if (queryParserName
076: .equals(LuceneEnvironment.QueryParser.DEFAULT_GROUP)) {
077: // no problem, continue here and we will create the default one ourself using the provided settings
078: continue;
079: }
080: throw new ConfigurationException(
081: "Failed to locate query parser ["
082: + queryParserName
083: + "] type, it must be set");
084: }
085: LuceneQueryParser queryParser;
086: try {
087: queryParser = (LuceneQueryParser) ClassUtils.forName(
088: queryParserType, settings.getClassLoader())
089: .newInstance();
090: } catch (Exception e) {
091: throw new ConfigurationException(
092: "Failed to create query parser class ["
093: + queryParserType + "]", e);
094: }
095: if (queryParser instanceof CompassConfigurable) {
096: ((CompassConfigurable) queryParser)
097: .configure(queryParserSettings);
098: }
099: if (queryParser instanceof CompassMappingAware) {
100: ((CompassMappingAware) queryParser)
101: .setCompassMapping(searchEngineFactory
102: .getMapping());
103: }
104: if (queryParser instanceof SearchEngineFactoryAware) {
105: ((SearchEngineFactoryAware) queryParser)
106: .setSearchEngineFactory(searchEngineFactory);
107: }
108: queryParsers.put(queryParserName, queryParser);
109: }
110: if (defaultGroupSettings == null) {
111: defaultGroupSettings = new CompassSettings(settings
112: .getClassLoader());
113: }
114: if (queryParsers
115: .get(LuceneEnvironment.QueryParser.DEFAULT_GROUP) == null) {
116: if (log.isDebugEnabled()) {
117: log
118: .debug("No default query parser found (under groupd [default]), registering a default one");
119: }
120: DefaultLuceneQueryParser queryParser = new DefaultLuceneQueryParser();
121: queryParser.configure(defaultGroupSettings);
122: queryParser.setCompassMapping(searchEngineFactory
123: .getMapping());
124: queryParser.setSearchEngineFactory(searchEngineFactory);
125: queryParsers.put(
126: LuceneEnvironment.QueryParser.DEFAULT_GROUP,
127: queryParser);
128: }
129: if (searchEngineFactory.getSpellCheckManager() != null) {
130: if (queryParsers
131: .get(LuceneEnvironment.QueryParser.SPELLCHECK_GROUP) == null) {
132: if (log.isDebugEnabled()) {
133: log
134: .debug("No spellcheck query parser found (under groupd [spellcheck]), registering a default one");
135: }
136: SpellCheckLuceneQueryParser queryParser = new SpellCheckLuceneQueryParser();
137: queryParser.configure(defaultGroupSettings);
138: queryParser.setCompassMapping(searchEngineFactory
139: .getMapping());
140: queryParser.setSearchEngineFactory(searchEngineFactory);
141: queryParsers.put(
142: LuceneEnvironment.QueryParser.SPELLCHECK_GROUP,
143: queryParser);
144: }
145: }
146: }
147:
148: public LuceneQueryParser getDefaultQueryParser() {
149: return getQueryParser(LuceneEnvironment.QueryParser.DEFAULT_GROUP);
150: }
151:
152: public LuceneQueryParser getQueryParser(String queryParserName)
153: throws IllegalArgumentException {
154: LuceneQueryParser queryParser = queryParsers
155: .get(queryParserName);
156: if (queryParser == null) {
157: throw new IllegalArgumentException(
158: "No query parser is configured under ["
159: + queryParserName + "]");
160: }
161: return queryParser;
162: }
163: }
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