package org.apache.lucene.queryParser.standard.builders;
/**
* 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.
*/
import org.apache.lucene.messages.MessageImpl;
import org.apache.lucene.queryParser.core.QueryNodeException;
import org.apache.lucene.queryParser.core.messages.QueryParserMessages;
import org.apache.lucene.queryParser.core.nodes.MatchNoDocsQueryNode;
import org.apache.lucene.queryParser.core.nodes.QueryNode;
import org.apache.lucene.queryParser.standard.parser.EscapeQuerySyntaxImpl;
import org.apache.lucene.search.BooleanQuery;
/**
* Builds an empty {@link BooleanQuery} object from a
* {@link MatchNoDocsQueryNode} object.
*/
public class MatchNoDocsQueryNodeBuilder implements StandardQueryBuilder {
public MatchNoDocsQueryNodeBuilder() {
// empty constructor
}
public BooleanQuery build(QueryNode queryNode) throws QueryNodeException {
// validates node
if (!(queryNode instanceof MatchNoDocsQueryNode)) {
throw new QueryNodeException(new MessageImpl(
QueryParserMessages.LUCENE_QUERY_CONVERSION_ERROR, queryNode
.toQueryString(new EscapeQuerySyntaxImpl()), queryNode.getClass()
.getName()));
}
return new BooleanQuery();
}
}