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