package org.apache.lucene.xmlparser.builders;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.search.FuzzyLikeThisQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.ParserException;
import org.apache.lucene.xmlparser.QueryBuilder;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
/**
* 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.
*/
public class FuzzyLikeThisQueryBuilder implements QueryBuilder
{
int defaultMaxNumTerms=50;
float defaultMinSimilarity=0.5f;
int defaultPrefixLength=1;
boolean defaultIgnoreTF=false;
private Analyzer analyzer;
public FuzzyLikeThisQueryBuilder(Analyzer analyzer)
{
this.analyzer=analyzer;
}
public Query getQuery(Element e) throws ParserException
{
NodeList nl = e.getElementsByTagName("Field");
int maxNumTerms=DOMUtils.getAttribute(e,"maxNumTerms",defaultMaxNumTerms);
FuzzyLikeThisQuery fbq=new FuzzyLikeThisQuery(maxNumTerms,analyzer);
fbq.setIgnoreTF(DOMUtils.getAttribute(e,"ignoreTF",defaultIgnoreTF));
for(int i=0;i<nl.getLength();i++)
{
Element fieldElem=(Element) nl.item(i);
float minSimilarity=DOMUtils.getAttribute(fieldElem,"minSimilarity",defaultMinSimilarity);
int prefixLength=DOMUtils.getAttribute(fieldElem,"prefixLength",defaultPrefixLength);
String fieldName=DOMUtils.getAttributeWithInheritance(fieldElem,"fieldName");
String value=DOMUtils.getText(fieldElem);
fbq.addTerms(value,fieldName,minSimilarity,prefixLength);
}
fbq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
return fbq;
}
}