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GroupQueryNode.cs
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GroupQueryNode.cs
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using Lucene.Net.QueryParsers.Flexible.Core.Messages;
using Lucene.Net.QueryParsers.Flexible.Core.Parser;
using System.Collections.Generic;
using JCG = J2N.Collections.Generic;
namespace Lucene.Net.QueryParsers.Flexible.Core.Nodes
{
/*
* 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.
*/
/// <summary>
/// A <see cref="GroupQueryNode"/> represents a location where the original user typed
/// real parenthesis on the query string. This class is useful for queries like:
/// a) a AND b OR c b) ( a AND b) OR c
///
/// Parenthesis might be used to define the boolean operation precedence.
/// </summary>
public class GroupQueryNode : QueryNode
{
/// <summary>
/// This IQueryNode is used to identify parenthesis on the original query string
/// </summary>
public GroupQueryNode(IQueryNode query)
{
// LUCENENET: Factored out NLS/Message/IMessage so end users can optionally utilize the built-in .NET localization.
// LUCENENET: Added paramName parameter and changed to the same error message as the default of ArgumentNullException.
// However, we still need this to be an error type so it is not caught in StandardSyntaxParser.
if (query is null)
throw new QueryNodeError(QueryParserMessages.ARGUMENT_CANNOT_BE_NULL, nameof(query));
Allocate();
IsLeaf = false;
Add(query);
}
public virtual IQueryNode GetChild()
{
return GetChildren()[0];
}
public override string ToString()
{
return "<group>" + "\n" + GetChild().ToString() + "\n</group>";
}
public override string ToQueryString(IEscapeQuerySyntax escapeSyntaxParser)
{
if (GetChild() is null)
return "";
return "( " + GetChild().ToQueryString(escapeSyntaxParser) + " )";
}
public override IQueryNode CloneTree()
{
GroupQueryNode clone = (GroupQueryNode)base.CloneTree();
return clone;
}
public virtual void SetChild(IQueryNode child)
{
IList<IQueryNode> list = new JCG.List<IQueryNode>
{
child
};
this.Set(list);
}
}
}