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ConditionOrExpression.cs
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/
ConditionOrExpression.cs
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//
// Copyright (c) 2004-2021 Jaroslaw Kowalski <jaak@jkowalski.net>, Kim Christensen, Julian Verdurmen
//
// 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.
//
namespace NLog.Conditions
{
/// <summary>
/// Condition <b>or</b> expression.
/// </summary>
internal sealed class ConditionOrExpression : ConditionExpression
{
/// <summary>
/// Initializes a new instance of the <see cref="ConditionOrExpression" /> class.
/// </summary>
/// <param name="left">Left hand side of the OR expression.</param>
/// <param name="right">Right hand side of the OR expression.</param>
public ConditionOrExpression(ConditionExpression left, ConditionExpression right)
{
LeftExpression = left;
RightExpression = right;
}
/// <summary>
/// Gets the left expression.
/// </summary>
/// <value>The left expression.</value>
public ConditionExpression LeftExpression { get; private set; }
/// <summary>
/// Gets the right expression.
/// </summary>
/// <value>The right expression.</value>
public ConditionExpression RightExpression { get; private set; }
/// <summary>
/// Returns a string representation of the expression.
/// </summary>
/// <returns>
/// A <see cref="T:System.String"/> that represents the condition expression.
/// </returns>
public override string ToString()
{
return $"({LeftExpression} or {RightExpression})";
}
/// <summary>
/// Evaluates the expression by evaluating <see cref="LeftExpression"/> and <see cref="RightExpression"/> recursively.
/// </summary>
/// <param name="context">Evaluation context.</param>
/// <returns>The value of the alternative operator.</returns>
protected override object EvaluateNode(LogEventInfo context)
{
var bval1 = (bool)LeftExpression.Evaluate(context);
if (bval1)
{
return BoxedTrue;
}
var bval2 = (bool)RightExpression.Evaluate(context);
if (bval2)
{
return BoxedTrue;
}
return BoxedFalse;
}
}
}