/*
* Created on 25-Jan-2006
*/
package org.apache.lucene.xmlparser.builders;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanFilter;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.FilterClause;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.FilterBuilder;
import org.apache.lucene.xmlparser.ParserException;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
/**
* @author maharwood
*/
public class BooleanFilterBuilder implements FilterBuilder {
private FilterBuilder factory;
public BooleanFilterBuilder(FilterBuilder factory)
{
this.factory=factory;
}
public Filter getFilter(Element e) throws ParserException {
BooleanFilter bf=new BooleanFilter();
NodeList nl = e.getElementsByTagName("Clause");
for(int i=0;i<nl.getLength();i++)
{
Element clauseElem=(Element) nl.item(i);
BooleanClause.Occur occurs=BooleanQueryBuilder.getOccursValue(clauseElem);
Element clauseFilter=DOMUtils.getFirstChildOrFail(clauseElem);
Filter f=factory.getFilter(clauseFilter);
bf.add(new FilterClause(f,occurs));
}
return bf;
}
}