#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.Util;
namespace Spring.Expressions{
/// <summary>
/// Represents OR operator (both, bitwise and logical).
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class OpOR : BinaryOperator
{
/// <summary>
/// Create a new instance
/// </summary>
public OpOR():base()
{
}
/// <summary>
/// Create a new instance
/// </summary>
public OpOR(BaseNode left, BaseNode right)
:base(left, right)
{
}
/// <summary>
/// Create a new instance from SerializationInfo
/// </summary>
protected OpOR(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>
/// Returns a value for the logical OR operator 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)
{
object l = GetLeftValue(context, evalContext);
object r = GetRightValue(context, evalContext);
if (NumberUtils.IsInteger(l) && NumberUtils.IsInteger(r))
{
return NumberUtils.BitwiseOr(l, r);
}
else if (l is Enum && l.GetType() == r.GetType())
{
Type enumType = l.GetType();
Type integralType = Enum.GetUnderlyingType(enumType);
l = Convert.ChangeType(l, integralType);
r = Convert.ChangeType(r, integralType);
object result = NumberUtils.BitwiseOr(l, r);
return Enum.ToObject(enumType, result);
}
else
return Convert.ToBoolean(l) || Convert.ToBoolean(r);
}
}
}
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