private MethodInfo FindProxyMethod(Type targetType, MethodInfo method)
{
ParameterInfo[] parameters = method.GetParameters();
ComposedCriteria searchCriteria = new ComposedCriteria();
searchCriteria.Add(new MethodNameMatchCriteria("proxy_" + method.Name));
searchCriteria.Add(new MethodParametersCountCriteria(parameters.Length));
#if NET_2_0
searchCriteria.Add(new MethodGenericArgumentsCountCriteria(
method.GetGenericArguments().Length));
#endif
searchCriteria.Add(new MethodParametersCriteria(ReflectionUtils.GetParameterTypes(parameters)));
MemberInfo[] matchingMethods = targetType.FindMembers(
MemberTypes.Method,
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
searchCriteria);
if (matchingMethods != null && matchingMethods.Length == 1)
{
return(matchingMethods[0] as MethodInfo);
}
else
{
throw new AmbiguousMatchException();
}
}
/// <summary>
/// Returns an array of all of those
/// <see cref="System.Reflection.MethodInfo">methods</see> exposed on the
/// <paramref name="searchType"/> that match the supplied criteria.
/// </summary>
/// <param name="methodName">
/// Methods that have this name (can be in the form of a regular expression).
/// </param>
/// <param name="expectedArgumentCount">
/// Methods that have exactly this many arguments.
/// </param>
/// <param name="isStatic">
/// Methods that are static / instance.
/// </param>
/// <param name="searchType">
/// The <see cref="System.Type"/> on which the methods (if any) are to be found.
/// </param>
/// <returns>
/// An array of all of those
/// <see cref="System.Reflection.MethodInfo">methods</see> exposed on the
/// <paramref name="searchType"/> that match the supplied criteria.
/// </returns>
private static IList <MethodInfo> FindMethods(string methodName, int expectedArgumentCount, bool isStatic, Type searchType)
{
ComposedCriteria methodCriteria = new ComposedCriteria();
methodCriteria.Add(new MethodNameMatchCriteria(methodName));
methodCriteria.Add(new MethodParametersCountCriteria(expectedArgumentCount));
BindingFlags methodFlags = BindingFlags.Public | BindingFlags.IgnoreCase | (isStatic ? BindingFlags.Static : BindingFlags.Instance);
MemberInfo[] methods = searchType.FindMembers(MemberTypes.Method, methodFlags, new CriteriaMemberFilter().FilterMemberByCriteria, methodCriteria);
return(methods.Cast <MethodInfo>().ToArray());
}
/// <summary>
/// Wires up the supplied event to any handler methods that match the event
/// signature.
/// </summary>
/// <param name="theEvent">The event being wired up.</param>
private void WireEvent(EventInfo theEvent)
{
// grab some info (such as the delegate's method signature) about the event
DelegateInfo eventDelegate = new DelegateInfo(theEvent);
// if the method name needs to be customised on a per event basis, do so
string customMethodName = GetMethodNameCustomisedForEvent(theEvent.Name);
// create the criteria for the handler method search...
ComposedCriteria methodCriteria = new ComposedCriteria();
// a candidate handlers method name must match the custom method name
methodCriteria.Add(new RegularExpressionMethodNameCriteria(customMethodName));
// the return Type of a candidate handlers method must be the same as the return type of the event
methodCriteria.Add(new MethodReturnTypeCriteria(eventDelegate.GetReturnType()));
// a candidate handlers method parameters must match the event's parameters
methodCriteria.Add(new MethodParametersCriteria(eventDelegate.GetParameterTypes()));
// and grab the methods that satisfy the criteria...
BindingFlags methodFlags = BindingFlags.Instance | BindingFlags.Static
| BindingFlags.NonPublic | BindingFlags.Public;
MemberInfo[] methods = HandlerType.FindMembers(
MemberTypes.Method,
methodFlags,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
methodCriteria);
// and for each method that satisfied the criteria...
foreach (MethodInfo method in methods)
{
#region Instrumentation
if (log.IsDebugEnabled)
{
log.Debug(string.Format(
CultureInfo.InvariantCulture,
"Wiring up this method '{0}' to this event '{1}'",
method.Name,
theEvent.Name));
}
#endregion
IEventHandlerValue myHandler = method.IsStatic ?
(IEventHandlerValue) new StaticEventHandlerValue() :
(IEventHandlerValue) new InstanceEventHandlerValue();
myHandler.EventName = theEvent.Name;
myHandler.MethodName = method.Name;
myHandler.Wire(Source, Handler);
}
}
/// <summary>
/// Return the <see cref="Spring.Transaction.Interceptor.ITransactionAttribute"/> for this
/// method.
/// </summary>
/// <param name="method">The method to check.</param>
/// <param name="targetType">
/// The target <see cref="System.Type"/>. May be null, in which case the declaring
/// class of the supplied <paramref name="method"/> must be used.
/// </param>
/// <returns>
/// A <see cref="Spring.Transaction.Interceptor.ITransactionAttribute"/> or
/// null if the method is non-transactional.
/// </returns>
public ITransactionAttribute ReturnTransactionAttribute(MethodInfo method, Type targetType)
{
//Might have registered MethodInfo objects whose declaring type is the interface, so 'downcast'
//to the most specific method which is typically what is passed in as the first method argument.
foreach (DictionaryEntry dictionaryEntry in _methodMap)
{
MethodInfo currentMethod = (MethodInfo)dictionaryEntry.Key;
MethodInfo specificMethod;
if (targetType == null)
{
specificMethod = currentMethod;
}
else
{
ParameterInfo[] parameters = currentMethod.GetParameters();
ComposedCriteria searchCriteria = new ComposedCriteria();
searchCriteria.Add(new MethodNameMatchCriteria(currentMethod.Name));
searchCriteria.Add(new MethodParametersCountCriteria(parameters.Length));
#if NET_2_0
searchCriteria.Add(new MethodGenericArgumentsCountCriteria(
currentMethod.GetGenericArguments().Length));
#endif
searchCriteria.Add(new MethodParametersCriteria(ReflectionUtils.GetParameterTypes(parameters)));
MemberInfo[] matchingMethods = targetType.FindMembers(
MemberTypes.Method,
BindingFlags.Instance | BindingFlags.Public,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
searchCriteria);
if (matchingMethods != null && matchingMethods.Length == 1)
{
specificMethod = matchingMethods[0] as MethodInfo;
}
else
{
specificMethod = currentMethod;
}
}
if (method == specificMethod)
{
return((ITransactionAttribute)dictionaryEntry.Value);
}
}
return((ITransactionAttribute)_methodMap[method]);
}
private ITransactionAttribute computeTransactionAttribute(MethodInfo method, Type targetType)
{
MethodInfo specificMethod;
if (targetType == null)
{
specificMethod = method;
}
else
{
ParameterInfo[] parameters = method.GetParameters();
ComposedCriteria searchCriteria = new ComposedCriteria();
searchCriteria.Add(new MethodNameMatchCriteria(method.Name));
searchCriteria.Add(new MethodParametersCountCriteria(parameters.Length));
#if NET_2_0
searchCriteria.Add(new MethodGenericArgumentsCountCriteria(
method.GetGenericArguments().Length));
#endif
searchCriteria.Add(new MethodParametersCriteria(ReflectionUtils.GetParameterTypes(parameters)));
MemberInfo[] matchingMethods = targetType.FindMembers(
MemberTypes.Method,
BindingFlags.Instance | BindingFlags.Public,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
searchCriteria);
if (matchingMethods != null && matchingMethods.Length == 1)
{
specificMethod = matchingMethods[0] as MethodInfo;
}
else
{
specificMethod = method;
}
}
ITransactionAttribute transactionAttribute = getTransactionAttribute(specificMethod);
if (null != transactionAttribute)
{
return(transactionAttribute);
}
else if (specificMethod != method)
{
transactionAttribute = getTransactionAttribute(method);
}
return(null);
}
/// <summary>
/// Queries the input type for a <see cref="MethodInfo" /> signature matching the input
/// <see cref="MethodInfo"/> signature.
/// </summary>
/// <remarks>
/// Typically used to query a potential subscriber to see if they implement an event handler.
/// </remarks>
/// <param name="invoke"><see cref="MethodInfo"/> to match against</param>
/// <param name="subscriberType"><see cref="Type"/> to query</param>
/// <returns>
/// <see cref="MethodInfo"/> matching input <see cref="MethodInfo"/>
/// signature, or <see langword="null"/> if there is no match.
/// </returns>
public static MethodInfo GetMethodInfoMatchingSignature(
MethodInfo invoke, Type subscriberType)
{
ParameterInfo[] parameters = invoke.GetParameters();
ComposedCriteria criteria = new ComposedCriteria();
criteria.Add(new MethodReturnTypeCriteria(invoke.ReturnType));
criteria.Add(new MethodParametersCountCriteria(parameters.Length));
criteria.Add(new MethodParametersCriteria(ReflectionUtils.GetParameterTypes(parameters)));
MemberInfo[] methods = subscriberType.FindMembers(
MemberTypes.Method, ReflectionUtils.AllMembersCaseInsensitiveFlags,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
criteria);
if (methods != null &&
methods.Length > 0)
{
return(methods[0] as MethodInfo);
}
return(null);
}
/// <summary>
/// Searches for and returns the method that is to be invoked.
/// </summary>
/// <remarks>
/// The return value of this method call will subsequently be returned from the
/// <see cref="Oragon.Spring.Objects.Support.MethodInvoker.GetPreparedMethod()"/>.
/// </remarks>
/// <returns>The method that is to be invoked.</returns>
/// <exception cref="System.MissingMethodException">
/// If no method could be found.
/// </exception>
/// <exception cref="System.ArgumentException">
/// If more than one method was found.
/// </exception>
protected virtual MethodInfo FindTheMethodToInvoke()
{
MethodInfo theMethod = null;
Type targetType = (TargetObject != null) ? TargetObject.GetType() : TargetType;
GenericArgumentsHolder genericInfo = new GenericArgumentsHolder(TargetMethod);
// if we don't have any named arguments, we can try to get the exact method first...
if (NamedArguments.Count == 0)
{
ComposedCriteria searchCriteria = new ComposedCriteria();
searchCriteria.Add(new MethodNameMatchCriteria(genericInfo.GenericMethodName));
searchCriteria.Add(new MethodParametersCountCriteria(ArgumentCount));
searchCriteria.Add(new MethodGenericArgumentsCountCriteria(genericInfo.GetGenericArguments().Length));
searchCriteria.Add(new MethodArgumentsCriteria(Arguments));
MemberInfo[] matchingMethods = targetType.FindMembers(
MemberTypes.Method,
MethodSearchingFlags,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
searchCriteria);
if (matchingMethods != null && matchingMethods.Length == 1)
{
theMethod = matchingMethods[0] as MethodInfo;
}
}
if (theMethod == null)
{
// search for a method with a matching signature...
ComposedCriteria searchCriteria = new ComposedCriteria();
searchCriteria.Add(new MethodNameMatchCriteria(genericInfo.GenericMethodName));
searchCriteria.Add(new MethodParametersCountCriteria(ArgumentCount));
searchCriteria.Add(new MethodGenericArgumentsCountCriteria(genericInfo.GetGenericArguments().Length));
MemberInfo[] matchingMethods = targetType.FindMembers(
MemberTypes.Method,
MethodSearchingFlags,
new MemberFilter(new CriteriaMemberFilter().FilterMemberByCriteria),
searchCriteria);
if (matchingMethods.Length == 0)
{
throw new MissingMethodException(targetType.Name, TargetMethod);
}
if (matchingMethods.Length > 1)
{
throw new ArgumentException(string.Format(
CultureInfo.InvariantCulture,
"Unable to determine which exact method to call; found '{0}' matches.",
matchingMethods.Length));
}
theMethod = matchingMethods[0] as MethodInfo;
}
if (genericInfo.ContainsGenericArguments)
{
string[] unresolvedGenericArgs = genericInfo.GetGenericArguments();
Type[] genericArgs = new Type[unresolvedGenericArgs.Length];
for (int j = 0; j < unresolvedGenericArgs.Length; j++)
{
genericArgs[j] = TypeResolutionUtils.ResolveType(unresolvedGenericArgs[j]);
}
theMethod = theMethod.MakeGenericMethod(genericArgs);
}
return(theMethod);
}
