package org.apache.lucene.xmlparser.builders;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.spans.SpanOrQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.ParserException;
import org.w3c.dom.Element;
/**
* 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 SpanOrTermsBuilder extends SpanBuilderBase
{
Analyzer analyzer;
/**
* @param analyzer
*/
public SpanOrTermsBuilder(Analyzer analyzer)
{
super();
this.analyzer = analyzer;
}
public SpanQuery getSpanQuery(Element e) throws ParserException
{
String fieldName=DOMUtils.getAttributeWithInheritanceOrFail(e,"fieldName");
String value=DOMUtils.getNonBlankTextOrFail(e);
try
{
ArrayList clausesList=new ArrayList();
TokenStream ts=analyzer.tokenStream(fieldName,new StringReader(value));
Token token=ts.next();
while(token!=null)
{
SpanTermQuery stq=new SpanTermQuery(new Term(fieldName,token.termText()));
clausesList.add(stq);
token=ts.next();
}
SpanOrQuery soq=new SpanOrQuery((SpanQuery[]) clausesList.toArray(new SpanQuery[clausesList.size()]));
soq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
return soq;
}
catch(IOException ioe)
{
throw new ParserException("IOException parsing value:"+value);
}
}
}