/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.cocoon.components.search.analyzer;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.PerFieldAnalyzerWrapper;
/**
* Configurable PerFieldAnalyzerWrapper. Allow one analyzer per field for
* indexing a document (useful for multilanguage document)
*
* (@link org.apache.lucene.analysis.PerFieldAnalyzerWrapper class)
*
*
* A config file for this analyzer is:
*
* <!-- if a lucene document containing a field not present in the "field" tags,
* the defaultAnalyzer would be used --> <config defaultAnalyzer="analyzerEN">
* <fields><!-- if a lucene document contains the field "summury" , the
* analyzer "analyzerEN" would be used --> <field name="summury"
* analyzer="analyzerEN"/> <field name="desc_fr" analyzer="analyzerFR"/> <field
* name="desc_en" analyzer="analyzerEN"/> <field name="desc_de"
* analyzer="analyzerDE"/> </fields> </config>
*
* @author Nicolas Maisonneuve
*/
public class ConfigurablePerFieldAnalyzer extends ConfigurableAnalyzer {
public static final String CONFIG_DEFAULTANALYZER_ATTRIBUTE = "defaultAnalyzer";
public static final String FIELDS_ELEMENT = "fields";
public static final String FIELD_ELEMENT = "field";
public static final String FIELD_NAME_ATTRIBUTE = "name";
public static final String FIELD_ANALYZERID_ATTRIBUTE = "analyzer";
/*
* (non-Javadoc)
*
* @see org.apache.cocoon.components.search.analyzer.ConfigurableAnalyzer#configure(org.apache.avalon.framework.configuration.Configuration)
*/
public void configure(Configuration configuration)
throws ConfigurationException {
String analyzerid = configuration
.getAttribute(CONFIG_DEFAULTANALYZER_ATTRIBUTE);
Analyzer analyzer = analyzerM.getAnalyzer(analyzerid);
if (analyzer == null) {
throw new ConfigurationException("analyzer " + analyzerid
+ " doesn't exist");
}
PerFieldAnalyzerWrapper tmpanalyzer = new PerFieldAnalyzerWrapper(
analyzer);
Configuration[] conffield = configuration.getChild(FIELDS_ELEMENT)
.getChildren(FIELD_ELEMENT);
for (int i = 0; i < conffield.length; i++) {
String fieldname = conffield[i].getAttribute(FIELD_NAME_ATTRIBUTE);
analyzerid = conffield[i].getAttribute(FIELD_ANALYZERID_ATTRIBUTE);
if (fieldname == null || fieldname.equals("")) {
throw new ConfigurationException("element " + FIELD_ELEMENT
+ " must have the " + FIELD_NAME_ATTRIBUTE
+ " attribute");
}
if (analyzerid == null || analyzerid.equals("")) {
throw new ConfigurationException("element " + FIELD_ELEMENT
+ " must have the " + FIELD_ANALYZERID_ATTRIBUTE
+ " attribute");
}
analyzer = analyzerM.getAnalyzer(analyzerid);
if (analyzer == null) {
throw new ConfigurationException("analyzer " + analyzerid
+ " doesn't exist");
}
tmpanalyzer.addAnalyzer(fieldname, analyzer);
}
this.analyzer = tmpanalyzer;
}
}