querybuilderfactory.java

lucene2.2.0版本

/*
 * Created on 25-Jan-2006
 */
package org.apache.lucene.xmlparser;

import java.util.HashMap;

import org.apache.lucene.search.Query;
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.
 */
/**
 * @author maharwood
 */
public class QueryBuilderFactory implements QueryBuilder {

	HashMap builders=new HashMap();
	
	public Query getQuery(Element n) throws ParserException {
		QueryBuilder builder=(QueryBuilder) builders.get(n.getNodeName());
		if(builder==null)
		{
			throw new ParserException("No QueryObjectBuilder defined for node "+n.getNodeName()); 
		}
		return builder.getQuery(n); 
	}
	public void addBuilder(String nodeName,QueryBuilder builder)
	{
		builders.put(nodeName,builder);
	}
	public QueryBuilder getQueryBuilder(String nodeName)
	{
		return (QueryBuilder) builders.get(nodeName);		
	}
	
}