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;
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.getAttributeWithInheritance(e,"fieldName");
if(fieldName==null)
{
throw new ParserException("Error: SpanOrTermsBuilder missing \"fieldName\" property");
}
String value=DOMUtils.getText(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);
}
}
}