package org.apache.lucene.queryParser.spans;
/**
* 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 java.util.List;
import org.apache.lucene.queryParser.core.QueryNodeException;
import org.apache.lucene.queryParser.core.builders.QueryTreeBuilder;
import org.apache.lucene.queryParser.core.nodes.BooleanQueryNode;
import org.apache.lucene.queryParser.core.nodes.QueryNode;
import org.apache.lucene.queryParser.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 {
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);
}
}