#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;
namespace Spring.Expressions{
/// <summary>
/// Represents parsed boolean literal node.
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class BooleanLiteralNode : BaseNode
{
private object nodeValue;
/// <summary>
/// Create a new instance
/// </summary>
public BooleanLiteralNode()
{
}
/// <summary>
/// Create a new instance
/// </summary>
public BooleanLiteralNode(string text)
{
this.Text = text;
}
/// <summary>
/// Create a new instance from SerializationInfo
/// </summary>
protected BooleanLiteralNode(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>
/// Returns a value for the boolean literal node.
/// </summary>
/// <summary>
/// This is the entrypoint into evaluating this expression.
/// </summary>
/// <returns>Node's value.</returns>
protected override object Get(object context, EvaluationContext evalContext)
{
if (nodeValue == null)
{
lock(this)
{
if (nodeValue == null)
{
nodeValue = Boolean.Parse(this.getText());
}
}
}
return nodeValue;
}
}
}
|