| /* |
| * 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 java.util.List; |
| |
| 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.QueryNode; |
| import org.apache.lucene.queryparser.flexible.standard.builders.StandardQueryBuilder; |
| import org.apache.lucene.search.spans.SpanOrQuery; |
| import org.apache.lucene.search.spans.SpanQuery; |
| |
| /** |
| * This builder creates {@link SpanOrQuery}s from a {@link BooleanQueryNode}.<br> |
| * <br> |
| * |
| * It assumes that the {@link BooleanQueryNode} instance has at least one child. |
| */ |
| public class SpanOrQueryNodeBuilder implements StandardQueryBuilder { |
| |
| @Override |
| public SpanOrQuery build(QueryNode node) throws QueryNodeException { |
| |
| // validates node |
| BooleanQueryNode booleanNode = (BooleanQueryNode) node; |
| |
| List<QueryNode> children = booleanNode.getChildren(); |
| SpanQuery[] spanQueries = new SpanQuery[children.size()]; |
| |
| int i = 0; |
| for (QueryNode child : children) { |
| spanQueries[i++] = (SpanQuery) child |
| .getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID); |
| } |
| |
| return new SpanOrQuery(spanQueries); |
| |
| } |
| |
| } |