/// <summary>
/// <para>Try gets all members based on the search filters provided, and provides a proper error message if no members was found.</para>
/// </summary>
public bool TryGetMembers(out MemberInfo[] memberInfos, out string errorMessage)
{
try
{
//if (this.name == null && this.HasCondition(ConditionFlags.HasName))
//{
// memberInfos = null;
// errorMessage = ""
//}
IEnumerable <MemberInfo> tmpMemberInfos = Enumerable.Empty <MemberInfo>();
BindingFlags bindingFlags = this.HasCondition(ConditionFlags.IsDeclaredOnly) ? BindingFlags.DeclaredOnly : BindingFlags.FlattenHierarchy;
bool hasNoParamaters = this.HasCondition(ConditionFlags.HasNoParamaters);
bool isInstance = this.HasCondition(ConditionFlags.IsInstance);
bool isStatic = this.HasCondition(ConditionFlags.IsStatic);
bool isPublic = this.HasCondition(ConditionFlags.IsPublic);
bool isNonPublic = this.HasCondition(ConditionFlags.IsNonPublic);
bool isMethod = this.HasCondition(ConditionFlags.IsMethod);
bool isField = this.HasCondition(ConditionFlags.IsField);
bool isProperty = this.HasCondition(ConditionFlags.IsProperty);
if (!isPublic && !isNonPublic)
{
isPublic = true;
isNonPublic = true;
}
if (!isStatic && !isInstance)
{
isStatic = true;
isInstance = true;
}
if (!(isField || isProperty || isMethod))
{
isMethod = true;
isField = true;
isProperty = true;
}
if (isInstance)
{
bindingFlags |= BindingFlags.Instance;
}
if (isStatic)
{
bindingFlags |= BindingFlags.Static;
}
if (isPublic)
{
bindingFlags |= BindingFlags.Public;
}
if (isNonPublic)
{
bindingFlags |= BindingFlags.NonPublic;
}
if (isMethod && isField && isProperty)
{
if (this.name == null)
{
tmpMemberInfos = this.type.GetAllMembers(bindingFlags);
}
else
{
tmpMemberInfos = this.type.GetAllMembers(bindingFlags).Where(n => n.Name == this.name);
}
if (hasNoParamaters)
{
tmpMemberInfos = tmpMemberInfos.Where(x => x is MethodInfo == false || (x as MethodInfo).GetParameters().Length == 0);
}
}
else
{
if (isMethod)
{
IEnumerable <MethodInfo> methodInfos = this.name == null?this.type.GetAllMembers <MethodInfo>(bindingFlags) : this.type.GetAllMembers <MethodInfo>(bindingFlags).Where(x => x.Name == name);
if (hasNoParamaters)
{
methodInfos = methodInfos.Where(x => x.GetParameters().Length == 0);
}
else if (this.paramTypes.Count > 0)
{
methodInfos = methodInfos.Where(x => x.HasParamaters(this.paramTypes));
}
tmpMemberInfos = methodInfos.OfType <MemberInfo>();
}
if (isField)
{
if (this.name == null)
{
tmpMemberInfos = tmpMemberInfos.AppendWith(this.type.GetAllMembers <FieldInfo>(bindingFlags).Cast <MemberInfo>());
}
else
{
tmpMemberInfos = tmpMemberInfos.AppendWith(this.type.GetAllMembers <FieldInfo>(bindingFlags).Where(n => n.Name == this.name).Cast <MemberInfo>());
}
}
if (isProperty)
{
if (this.name == null)
{
tmpMemberInfos = tmpMemberInfos.AppendWith(this.type.GetAllMembers <PropertyInfo>(bindingFlags).Cast <MemberInfo>());
}
else
{
tmpMemberInfos = tmpMemberInfos.AppendWith(this.type.GetAllMembers <PropertyInfo>(bindingFlags).Where(n => n.Name == this.name).Cast <MemberInfo>());
}
}
}
if (this.returnType != null)
{
Type returnType = null;
if (this.returnTypeCanBeConverted)
{
tmpMemberInfos = tmpMemberInfos.Where(x => (returnType = x.GetReturnType()) != null && ConvertUtility.CanConvert(returnType, this.returnType));
}
else if (this.returnTypeCanInherit)
{
tmpMemberInfos = tmpMemberInfos.Where(x => (returnType = x.GetReturnType()) != null && returnType.InheritsFrom(this.returnType));
}
else
{
tmpMemberInfos = tmpMemberInfos.Where(x => (returnType = x.GetReturnType()) != null && returnType == this.returnType);
}
}
memberInfos = tmpMemberInfos.ToArray();
if (memberInfos != null && memberInfos.Length != 0)
{
errorMessage = null;
return(true);
}
else
{
MemberInfo namedMember = this.name == null ? null : this.type.GetMember(this.name, Flags.AllMembers).FirstOrDefault(t =>
t is MethodInfo && isMethod ||
t is FieldInfo && isField ||
t is PropertyInfo && isProperty);
if (namedMember != null)
{
string accessModifies = namedMember.IsStatic() ? "Static " : "Non-static ";
bool noParamaterExpected = hasNoParamaters && namedMember is MethodInfo && (namedMember as MethodInfo).GetParameters().Length > 0;
if (noParamaterExpected)
{
errorMessage = accessModifies + "method " + this.name + " can not take parameters.";
return(false);
}
bool wrongParameters = isMethod && this.paramTypes.Count > 0 && namedMember is MethodInfo && (namedMember as MethodInfo).HasParamaters(this.paramTypes) == false;
if (wrongParameters)
{
errorMessage = accessModifies + "method " + this.name + " must have the following parameters: " + string.Join(", ", this.paramTypes.Select(x => x.GetNiceName()).ToArray()) + ".";
return(false);
}
bool wrongReturnType = this.returnType != null && this.returnType != namedMember.GetReturnType();
if (wrongReturnType)
{
if (this.returnTypeCanBeConverted)
{
errorMessage = accessModifies + namedMember.MemberType.ToString().ToLower(CultureInfo.InvariantCulture) + " " + this.name + " must have a return type that can be cast to " + this.returnType.GetNiceName() + ".";
}
else if (this.returnTypeCanInherit)
{
errorMessage = accessModifies + namedMember.MemberType.ToString().ToLower(CultureInfo.InvariantCulture) + " " + this.name + " must have a return type that is assignable to " + this.returnType.GetNiceName() + ".";
}
else
{
errorMessage = accessModifies + namedMember.MemberType.ToString().ToLower(CultureInfo.InvariantCulture) + " " + this.name + " must have a return type of " + this.returnType.GetNiceName() + ".";
}
return(false);
}
}
int modCount = (isField ? 1 : 0) + (isProperty ? 1 : 0) + (isMethod ? 1 : 0);
string strMemberTypes = (isField ? ("fields" + (modCount-- > 1 ? (modCount == 1 ? " or " : ", ") : " ")) : string.Empty) +
(isProperty ? ("properties" + (modCount-- > 1 ? (modCount == 1 ? " or " : ", ") : " ")) : string.Empty) +
(isMethod ? ("methods" + (modCount-- > 1 ? (modCount == 1 ? " or " : ", ") : " ")) : string.Empty);
string strAccessModifiers = (isPublic != isNonPublic ? (isPublic ? "public " : "non-public ") : string.Empty) +
(isStatic != isInstance ? (isStatic ? "static " : "non-static ") : string.Empty);
string strReturnType = this.returnType == null ? " " : ("with a return type of " + this.returnType.GetNiceName() + " ");
string strParameters = this.paramTypes.Count == 0 ? " " : (strReturnType == " " ? "" : "and ") + "with the parameter signature (" + string.Join(", ", this.paramTypes.Select(n => n.GetNiceName()).ToArray()) + ") ";
if (this.name == null)
{
errorMessage = "No " + strAccessModifiers + strMemberTypes + strReturnType + strParameters + "was found in " + this.type.GetNiceName() + ".";
return(false);
}
else
{
errorMessage = "No " + strAccessModifiers + strMemberTypes + "named " + this.name + " " + strReturnType + strParameters + "was found in " + this.type.GetNiceName() + ".";
return(false);
}
}
}
finally
{
Cache <MemberFinder> .Release(this.cache);
}
}