#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
#region Imports
using System;
using System.Reflection;
using Spring.Core;
using Spring.Util;
#endregion
namespace Spring.Core{
/// <summary>
/// Criteria that is satisfied if the <see cref="System.Type"/> of each of the
/// parameters of a given <see cref="System.Reflection.MethodInfo"/> matches each
/// of the parameter <see cref="System.Type"/>s of a given
/// <see cref="System.Reflection.MethodInfo"/>.
/// </summary>
/// <remarks>
/// <p>
/// If no <see cref="System.Type"/> array is passed to the overloaded constructor,
/// any method that has no parameters will satisfy an instance of this
/// class. The same effect could be achieved by passing the
/// <see cref="System.Type.EmptyTypes"/> array to the overloaded constructor.
/// </p>
/// </remarks>
/// <author>Rick Evans</author>
/// <author>Bruno Baia</author>
public class MethodParametersCriteria : ICriteria
{
#region Constructor (s) / Destructor
/// <summary>
/// Creates a new instance of the
/// <see cref="MethodParametersCriteria"/> class.
/// </summary>
public MethodParametersCriteria() : this(Type.EmptyTypes)
{
}
/// <summary>
/// Creates a new instance of the
/// <see cref="MethodParametersCriteria"/> class.
/// </summary>
/// <remarks>
/// <p>
/// If the supplied <paramref name="parameters"/> array is null, then this
/// constructor uses the <see cref="System.Type.EmptyTypes"/> array.
/// </p>
/// </remarks>
/// <param name="parameters">
/// The <see cref="System.Type"/> array that this criteria will use to
/// check parameter <see cref="System.Type"/>s.
/// </param>
public MethodParametersCriteria(Type[] parameters)
{
_parameters = parameters;
}
#endregion
#region Methods
/// <summary>
/// Does the supplied <paramref name="datum"/> satisfy the criteria encapsulated by
/// this instance?
/// </summary>
/// <param name="datum">The datum to be checked by this criteria instance.</param>
/// <returns>
/// True if the supplied <paramref name="datum"/> satisfies the criteria encapsulated
/// by this instance; false if not or the supplied <paramref name="datum"/> is null.
/// </returns>
public bool IsSatisfied(object datum)
{
bool satisfied = false;
MethodInfo method = datum as MethodInfo;
if (method != null)
{
ParameterInfo[] parameterInfosBeingChecked = method.GetParameters();
if (parameterInfosBeingChecked != null
&& parameterInfosBeingChecked.Length == _parameters.Length)
{
satisfied = true;
for (int i = 0; i < _parameters.Length; ++i)
{
foreach (ParameterInfo paramInfo in parameterInfosBeingChecked)
{
if (paramInfo.ParameterType == _parameters[i])
{
satisfied = true;
continue;
}
satisfied = false;
}
}
}
}
return satisfied;
}
#endregion
#region Fields
private readonly Type[] _parameters;
#endregion
}
}
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