//
// Copyright (c) 2004-2006 Jaroslaw Kowalski <jaak@jkowalski.net>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of Jaroslaw Kowalski nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
using System;
using System.IO;
using System.Xml.Serialization;
namespace NLog.Conditions
{
/// <summary>
/// Condition literal expression (numeric, <b>LogLevel.XXX</b>, <b>true</b> or <b>false</b>)
/// </summary>
internal sealed class ConditionLiteralExpression : ConditionExpression
{
private object _literal;
/// <summary>
/// Creates a new instance of <see cref="ConditionLiteralExpression"/>
/// and initializes it with the specified value.
/// </summary>
/// <param name="literal"></param>
public ConditionLiteralExpression(object literal)
{
_literal = literal;
}
/// <summary>
/// Evaluates the expression.
/// </summary>
/// <param name="context">Evaluation context.</param>
/// <returns>The literal value as passed in the constructor.</returns>
public override object Evaluate(LogEventInfo context)
{
return _literal;
}
/// <summary>
/// Returns a string representation of the expression.
/// </summary>
/// <returns>The literal value.</returns>
public override string ToString()
{
return _literal.ToString();
}
}
}