| /* |
| * 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); |
| } |
| |
| } |