#region License
/*
* Copyright 2002-2005 the original author or authors.
*
* 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.
*/
#endregion
using System;
using System.Runtime.Serialization;
using Spring.Expressions.Parser.antlr.collections;
namespace Spring.Expressions{
/// <summary>
/// Represents ternary expression node.
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class TernaryNode : BaseNode
{
private bool initialized = false;
private BaseNode condition;
private BaseNode trueExp;
private BaseNode falseExp;
/// <summary>
/// Create a new instance
/// </summary>
public TernaryNode():base()
{
}
/// <summary>
/// Create a new instance from SerializationInfo
/// </summary>
protected TernaryNode(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>
/// Returns a value for the string literal node.
/// </summary>
/// <param name="context">Context to evaluate expressions against.</param>
/// <param name="evalContext">Current expression evaluation context.</param>
/// <returns>Node's value.</returns>
protected override object Get(object context, EvaluationContext evalContext)
{
if (!initialized)
{
lock (this)
{
if (!initialized)
{
AST node = this.getFirstChild();
condition = (BaseNode) node;
node = node.getNextSibling();
trueExp = (BaseNode) node;
node = node.getNextSibling();
falseExp = (BaseNode) node;
initialized = true;
}
}
}
if (Convert.ToBoolean(GetValue(condition, context, evalContext)))
{
return GetValue(trueExp, context, evalContext);
}
else
{
return GetValue(falseExp, context, evalContext);
}
}
}
}
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