/// <summary>
/// Can the advised interfaces be implemented by the introduction
/// advice?
/// </summary>
/// <remarks>
/// <p>
/// Invoked <b>before</b> adding an
/// <seealso cref="Oragon.Spring.Aop.IIntroductionAdvisor"/>.
/// </p>
/// </remarks>
/// <exception cref="System.ArgumentException">
/// If the advised interfaces cannot be implemented by the introduction
/// advice.
/// </exception>
/// <seealso cref="Oragon.Spring.Aop.IIntroductionAdvisor.Interfaces"/>
/// <exception cref="System.ArgumentException">
/// If any of the <see cref="Interfaces"/> are not interface <see cref="System.Type"/>.
/// </exception>
public virtual void ValidateInterfaces()
{
foreach (Type intf in _interfaces)
{
BailIfNotAnInterfaceType(intf);
if (!intf.IsAssignableFrom(_introduction.GetType()))
{
throw new ArgumentException("Introduction [" + _introduction.GetType().FullName + "] " +
"does not implement interface '" + intf.FullName + "' specified in introduction advice.");
}
}
}
/// <summary>
/// Gets priority level from the specified advice.
/// </summary>
/// <param name="advice">The advice.</param>
/// <returns></returns>
public static int GetLevel(IAdvice advice)
{
var priorityAttribute = advice.GetType().GetCustomAttributes(typeof (Priority), true).Cast<Priority>().SingleOrDefault();
if (priorityAttribute != null)
return priorityAttribute.Level;
return DefaultLevel;
}
/// <summary>
/// Gets priority level from the specified advice.
/// </summary>
/// <param name="advice">The advice.</param>
/// <returns></returns>
public static int GetLevel(IAdvice advice)
{
var priorityAttribute = advice.GetType().GetCustomAttributes(typeof(PriorityAttribute), true).Cast <PriorityAttribute>().SingleOrDefault();
if (priorityAttribute != null)
{
return(priorityAttribute.Level);
}
return(DefaultLevel);
}
private Type GetNonLazyType(IAdvice advice)
{
var type = advice.GetType();
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(LazyAdvice <>))
{
return(type.GetGenericArguments()[0]);
}
return(type);
}
/// <summary>
/// Finds the introduced field.
/// </summary>
/// <param name="advice">The advice.</param>
/// <param name="adviceMemberInfo">The advice member information.</param>
/// <param name="advisedType">Type of the advised.</param>
/// <returns></returns>
/// <exception cref="System.InvalidOperationException">Internal error, can not find matching introduced field</exception>
internal static FieldInfo FindIntroducedField(IAdvice advice, MemberInfo adviceMemberInfo, Type advisedType)
{
var introducedFieldType = GetIntroducedType(adviceMemberInfo);
var adviceType = advice.GetType();
var introducedFieldName = IntroductionRules.GetName(adviceType.Namespace, adviceType.Name, adviceMemberInfo.Name);
var linkID = string.Format("{0}:{1}", adviceType.AssemblyQualifiedName, adviceMemberInfo.Name);
const BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;
var introducedField = FindIntroducedFieldByName(advisedType, introducedFieldName, linkID, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), null, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), linkID, bindingFlags);
if (introducedField == null)
throw new InvalidOperationException("Internal error, can not find matching introduced field");
var introducedFieldAttribute = introducedField.GetCustomAttribute<IntroducedFieldAttribute>();
introducedFieldAttribute.LinkID = linkID;
return introducedField;
}
/// <summary>
/// Injects the introduced fields to advice.
/// </summary>
/// <param name="advice">The advice.</param>
/// <param name="advisedType">Type of the advised.</param>
private static void InjectIntroducedFields(IAdvice advice, Type advisedType)
{
// shame, but easy here
if (advice == null)
{
return;
}
const BindingFlags adviceMembersBindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static;
foreach (var memberInfo in advice.GetType().GetFieldsAndProperties(adviceMembersBindingFlags).Where(IsIntroduction))
{
var memberValue = memberInfo.GetValue(advice);
if (memberValue == null)
{
InjectIntroducedField(advice, memberInfo, advisedType);
}
}
}
/// <summary>
/// Finds the introduced field.
/// </summary>
/// <param name="advice">The advice.</param>
/// <param name="adviceMemberInfo">The advice member information.</param>
/// <param name="advisedType">Type of the advised.</param>
/// <param name="advisedMemberName">Name of the advised member.</param>
/// <returns></returns>
/// <exception cref="InvalidOperationException">Internal error, can not find matching introduced field</exception>
/// <exception cref="System.InvalidOperationException">Internal error, can not find matching introduced field</exception>
internal static FieldInfo FindIntroducedField(IAdvice advice, MemberInfo adviceMemberInfo, Type advisedType, string advisedMemberName)
{
var introducedFieldType = GetIntroducedType(adviceMemberInfo);
var adviceType = advice.GetType();
var introducedFieldName = IntroductionRules.GetName(adviceType.Namespace, adviceType.Name, advisedMemberName, adviceMemberInfo.Name);
const BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;
var introducedField = FindIntroducedFieldByName(advisedType, introducedFieldName, introducedFieldName, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), null, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), introducedFieldName, bindingFlags);
if (introducedField is null)
{
throw new InvalidOperationException("Internal error, can not find matching introduced field");
}
var introducedFieldAttribute = introducedField.GetAttributes <IntroducedFieldAttribute>().Single();
introducedFieldAttribute.LinkID = introducedFieldName;
return(introducedField);
}
/// <summary>
/// Gets the introduced field.
/// Since the attribute may be at assembly level, the advised type is given as parameter
/// A cache is kept, by target type.
/// </summary>
/// <param name="context">The context.</param>
/// <returns></returns>
protected FieldInfo GetIntroducedField(IAdviceContextTarget context)
{
var targetType = context.TargetType;
// this is where the advice is applied (method, property, event). For shared events this is instance-wide, so unrelated to any target
var targetName = IsShared ? null : context.TargetName;
var fieldInfos = GetIntroducedFieldsRegistry(context);
lock (fieldInfos)
{
//var key = Tuple.Create(targetType, targetName);
var key = new IntroducedFieldsRegistry.Key(_ownerAdvice.GetType(), _ownerMemberInfo, targetName);
if (fieldInfos.Fields.TryGetValue(key, out var introducedField))
{
return(introducedField);
}
fieldInfos.Fields[key] = introducedField = Invocation.FindIntroducedField(_ownerAdvice, _ownerMemberInfo, targetType, targetName);
return(introducedField);
}
}
/// <summary>
/// Finds the introduced field.
/// </summary>
/// <param name="advice">The advice.</param>
/// <param name="adviceMemberInfo">The advice member information.</param>
/// <param name="advisedType">Type of the advised.</param>
/// <returns></returns>
/// <exception cref="System.InvalidOperationException">Internal error, can not find matching introduced field</exception>
internal static FieldInfo FindIntroducedField(IAdvice advice, MemberInfo adviceMemberInfo, Type advisedType)
{
var introducedFieldType = GetIntroducedType(adviceMemberInfo);
var adviceType = advice.GetType();
var introducedFieldName = IntroductionRules.GetName(adviceType.Namespace, adviceType.Name, adviceMemberInfo.Name);
var linkID = string.Format("{0}:{1}", adviceType.AssemblyQualifiedName, adviceMemberInfo.Name);
const BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;
var introducedField = FindIntroducedFieldByName(advisedType, introducedFieldName, linkID, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), null, bindingFlags)
?? FindIntroducedFieldByTypeAndAvailability(advisedType, introducedFieldType, adviceMemberInfo.IsStatic(), linkID, bindingFlags);
if (introducedField == null)
{
throw new InvalidOperationException("Internal error, can not find matching introduced field");
}
var introducedFieldAttribute = introducedField.GetCustomAttribute <IntroducedFieldAttribute>();
introducedFieldAttribute.LinkID = linkID;
return(introducedField);
}
/// <summary>
/// Creates a new instance of the
/// <see cref="Oragon.Spring.Aop.Support.DefaultIntroductionAdvisor"/> class using
/// the supplied <paramref name="introduction"/>
/// </summary>
/// <remarks>
/// <p>
/// This constructor adds all interfaces implemented by the supplied
/// <paramref name="introduction"/> (except the
/// <see cref="AopAlliance.Aop.IAdvice"/> interface) to the list of
/// interfaces to introduce.
/// </p>
/// </remarks>
/// <param name="introduction">The introduction to use.</param>
public DefaultIntroductionAdvisor(IAdvice introduction)
: this(introduction, introduction.GetType().GetInterfaces())
{
}
/// <summary>
/// Injects the introduced fields to advice.
/// </summary>
/// <param name="advice">The advice.</param>
/// <param name="advisedType">Type of the advised.</param>
private static void InjectIntroducedFields(IAdvice advice, Type advisedType)
{
// shame, but easy here
if (advice == null)
return;
const BindingFlags adviceMembersBindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static;
foreach (var memberInfo in advice.GetType().GetFieldsAndProperties(adviceMembersBindingFlags).Where(IsIntroduction))
{
var memberValue = memberInfo.GetValue(advice);
if (memberValue == null)
InjectIntroducedField(advice, memberInfo, advisedType);
}
}
/// <summary>
/// Creates a new instance of the
/// <see cref="Spring.Aop.Support.DefaultIntroductionAdvisor"/> class using
/// the supplied <paramref name="introduction"/>
/// </summary>
/// <remarks>
/// <p>
/// This constructor adds all interfaces implemented by the supplied
/// <paramref name="introduction"/> (except the
/// <see cref="AopAlliance.Aop.IAdvice"/> interface) to the list of
/// interfaces to introduce.
/// </p>
/// </remarks>
/// <param name="introduction">The introduction to use.</param>
public DefaultIntroductionAdvisor(IAdvice introduction)
: this(introduction, introduction.GetType().GetInterfaces())
{
}
public static IList <MemberInfo> GetIntroducedFields(IAdvice advice)
{
const BindingFlags adviceMembersBindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static;
return(new ReadOnlyCollection <MemberInfo>(advice.GetType().GetFieldsAndProperties(adviceMembersBindingFlags).Where(IsIntroduction).ToArray()));
}
public void Add(IAdvice advice, IPointcut pointcut)
{
_appliedAdvices.Add(new AppliedAdvice(advice, pointcut));
_blockedTypes.Add(advice.GetType());
}
