userinputquerybuilder.java

lucene2.2.0版本

package org.apache.lucene.xmlparser.builders;

import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Query;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.ParserException;
import org.apache.lucene.xmlparser.QueryBuilder;
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 UserInputQueryBuilder implements QueryBuilder {

	QueryParser parser;
	
	/**
	 * @param parser
	 */
	public UserInputQueryBuilder(QueryParser parser) {
		this.parser = parser;
	}
	
	/* (non-Javadoc)
	 * @see org.apache.lucene.xmlparser.QueryObjectBuilder#process(org.w3c.dom.Element)
	 */
	public Query getQuery(Element e) throws ParserException {
		String text=DOMUtils.getText(e);
		try {
			Query q = parser.parse(text);
			q.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
			return q;
		} catch (ParseException e1) {
			throw new ParserException(e1.getMessage());
		}
	}

}