package org.apache.lucene.xmlparser.builders;

import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.FilterBuilderFactory;
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.
 */
public class ConstantScoreQueryBuilder implements QueryBuilder
{
	private FilterBuilderFactory filterFactory;

	public ConstantScoreQueryBuilder(FilterBuilderFactory filterFactory)
	{
		this.filterFactory=filterFactory;
	}

	public Query getQuery(Element e) throws ParserException
	{
 		Element filterElem=DOMUtils.getFirstChildOrFail(e);
  		Query q=new ConstantScoreQuery(filterFactory.getFilter(filterElem));

  		q.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));

  		return q;
		
	}

}