/*
* 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.
*/
package org.apache.lucene.queryparser.flexible.spans;
import org.apache.lucene.queryparser.flexible.core.QueryNodeException;
import org.apache.lucene.queryparser.flexible.core.builders.QueryTreeBuilder;
import org.apache.lucene.queryparser.flexible.core.nodes.BooleanQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.standard.builders.StandardQueryBuilder;
import org.apache.lucene.search.spans.SpanQuery;
/**
* Sets up a query tree builder to build a span query tree from a query node
* tree.<br>
* <br>
*
* The defined map is:<br>
* - every BooleanQueryNode instance is delegated to the SpanOrQueryNodeBuilder<br>
* - every FieldQueryNode instance is delegated to the SpanTermQueryNodeBuilder <br>
*
*/
public class SpansQueryTreeBuilder extends QueryTreeBuilder implements
StandardQueryBuilder {
public SpansQueryTreeBuilder() {
setBuilder(BooleanQueryNode.class, new SpanOrQueryNodeBuilder());
setBuilder(FieldQueryNode.class, new SpanTermQueryNodeBuilder());
}
@Override
public SpanQuery build(QueryNode queryTree) throws QueryNodeException {
return (SpanQuery) super.build(queryTree);
}
}