#region License
/*
* Copyright 2002-2006 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
#region Imports
using System;
using System.Reflection;
using Spring.Expressions;
using Spring.Aop.Support;
#endregion
namespace Spring.AopQuickStart.Aspects{
/// <summary>
/// Dynamic pointcut using Spring expressions.
/// </summary>
/// <author>Bruno Baia</author>
/// <version>$Id: ExpressionDynamicPointcutAdvisor.cs,v 1.1 2007/07/26 00:50:11 bbaia Exp $</version>
public class ExpressionDynamicPointcutAdvisor : DynamicMethodMatcherPointcutAdvisor
{
private string expression;
public string Expression
{
get { return expression; }
set { expression = value; }
}
/// <summary>
/// Is there a runtime (dynamic) match for the supplied method ?
/// </summary>
public override bool Matches(MethodInfo method, Type targetType, object[] args)
{
IExpression expr = Spring.Expressions.Expression.Parse(Expression);
MatchingInfoHolder infoHolder = new MatchingInfoHolder(method, targetType, args);
try
{
// Evaluate the expression using the current matching info as current context
return (bool)expr.GetValue(infoHolder);
}
catch (Exception e)
{
throw new ArgumentException(
"Expression cannot be evaluate or not return a boolean.", "Expression", e);
}
}
#region MatchingInfoHolder inner class definition
public class MatchingInfoHolder
{
#region Fields
private MethodInfo _methodInfo;
private Type _targetType;
private object[] _args;
#endregion
#region Properties
/// <summary>
/// Get or sets the candidate method.
/// </summary>
public MethodInfo MethodInfo
{
get { return _methodInfo; }
set { _methodInfo = value; }
}
/// <summary>
/// Gets or sets the target type.
/// </summary>
public Type TargetType
{
get { return _targetType; }
set { _targetType = value; }
}
/// <summary>
/// Gets or sets the arguments to the method.
/// </summary>
public object[] Args
{
get { return _args; }
set { _args = value; }
}
#endregion
#region Constructor(s) / Destructor
/// <summary>
/// Creates a new instance of the
/// <see cref="Spring.AopQuickStart.Aspects.ExpressionDynamicPoincutAdvisor+MatchingInfoHolder"/> class.
/// </summary>
public MatchingInfoHolder()
{
}
/// <summary>
/// Creates a new instance of the
/// <see cref="Spring.AopQuickStart.Aspects.ExpressionDynamicPoincutAdvisor+MatchingInfoHolder"/> class.
/// </summary>
public MatchingInfoHolder(MethodInfo methodInfo, Type targetType, object[] args)
{
_methodInfo = methodInfo;
_targetType = targetType;
_args = args;
}
#endregion
}
#endregion
}
}
|