/**
* Copyright 2014 National University of Ireland, Galway.
*
* This file is part of the SIREn project. Project and contact information:
*
* https://github.com/rdelbru/SIREn
*
* Licensed 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.sindice.siren.qparser.keyword.nodes;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
import org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl;
import org.apache.lucene.queryparser.flexible.core.parser.EscapeQuerySyntax;
import org.sindice.siren.qparser.keyword.builders.TopLevelQueryNodeBuilder;
import org.sindice.siren.search.node.LuceneProxyNodeQuery;
import org.sindice.siren.search.node.NodeTermQuery;
/**
* This {@link QueryNode} represents the top level {@link QueryNode}
* of a keyword query.
*
* <p>
*
* It is used in {@link TopLevelQueryNodeBuilder} for wrapping
* primitive queries, e.g., {@link NodeTermQuery}, into a
* {@link LuceneProxyNodeQuery}.
*/
public class TopLevelQueryNode
extends QueryNodeImpl {
public TopLevelQueryNode(final QueryNode q) {
this.allocate();
this.setLeaf(false);
this.add(q);
}
@Override
public CharSequence toQueryString(final EscapeQuerySyntax escapeSyntaxParser) {
return this.getChildren().get(0).toQueryString(escapeSyntaxParser);
}
@Override
public String toString() {
return "<top>\n" + this.getChildren().get(0) + "\n</top>";
}
}