/*
* Pushes the value of a member or a delegate to call it, depending on the type of
* the member. Works with static or instance members.
* Uses reflection to find members, and stores the reflected MemberInfo object in
* a cache (indexed by the type of the object and the name of the member).
*/
private int GetMember(LuaState luaState, IReflect objType, object obj, string methodName, BindingFlags bindingType)
{
bool implicitStatic = false;
MemberInfo member = null;
object cachedMember = CheckMemberCache(memberCache, objType, methodName);
//object cachedMember=null;
if (cachedMember is LuaNativeFunction)
{
translator.PushFunction(luaState, (LuaNativeFunction)cachedMember);
translator.Push(luaState, true);
return(2);
}
else if (cachedMember != null)
{
member = (MemberInfo)cachedMember;
}
else
{
//CP: Removed NonPublic binding search
var members = objType.GetMember(methodName, bindingType | BindingFlags.Public | BindingFlags.IgnoreCase /*| BindingFlags.NonPublic*/);
if (members.Length > 0)
{
member = members [0];
}
else
{
// If we can't find any suitable instance members, try to find them as statics - but we only want to allow implicit static
// lookups for fields/properties/events -kevinh
//CP: Removed NonPublic binding search and made case insensitive
members = objType.GetMember(methodName, bindingType | BindingFlags.Static | BindingFlags.Public | BindingFlags.IgnoreCase /*| BindingFlags.NonPublic*/);
if (members.Length > 0)
{
member = members [0];
implicitStatic = true;
}
}
}
if (member != null)
{
if (member.MemberType == MemberTypes.Field)
{
var field = (FieldInfo)member;
if (cachedMember == null)
{
SetMemberCache(memberCache, objType, methodName, member);
}
try {
translator.Push(luaState, field.GetValue(obj));
} catch {
LuaLib.LuaPushNil(luaState);
}
}
else if (member.MemberType == MemberTypes.Property)
{
var property = (PropertyInfo)member;
if (cachedMember == null)
{
SetMemberCache(memberCache, objType, methodName, member);
}
try {
object val = property.GetValue(obj, null);
translator.Push(luaState, val);
} catch (ArgumentException) {
// If we can't find the getter in our class, recurse up to the base class and see
// if they can help.
if (objType is Type && !(((Type)objType) == typeof(object)))
{
return(GetMember(luaState, ((Type)objType).BaseType, obj, methodName, bindingType));
}
else
{
LuaLib.LuaPushNil(luaState);
}
} catch (TargetInvocationException e) { // Convert this exception into a Lua error
ThrowError(luaState, e);
LuaLib.LuaPushNil(luaState);
}
}
else if (member.MemberType == MemberTypes.Event)
{
var eventInfo = (EventInfo)member;
if (cachedMember == null)
{
SetMemberCache(memberCache, objType, methodName, member);
}
translator.Push(luaState, new RegisterEventHandler(translator.pendingEvents, obj, eventInfo));
}
else if (!implicitStatic)
{
if (member.MemberType == MemberTypes.NestedType)
{
// kevinh - added support for finding nested types
// cache us
if (cachedMember == null)
{
SetMemberCache(memberCache, objType, methodName, member);
}
// Find the name of our class
string name = member.Name;
var dectype = member.DeclaringType;
// Build a new long name and try to find the type by name
string longname = dectype.FullName + "+" + name;
var nestedType = translator.FindType(longname);
translator.PushType(luaState, nestedType);
}
else
{
// Member type must be 'method'
var wrapper = new LuaNativeFunction((new LuaMethodWrapper(translator, objType, methodName, bindingType)).invokeFunction);
if (cachedMember == null)
{
SetMemberCache(memberCache, objType, methodName, wrapper);
}
translator.PushFunction(luaState, wrapper);
translator.Push(luaState, true);
return(2);
}
}
else
{
// If we reach this point we found a static method, but can't use it in this context because the user passed in an instance
translator.ThrowError(luaState, "can't pass instance to static method " + methodName);
LuaLib.LuaPushNil(luaState);
}
}
else
{
// kevinh - we want to throw an exception because meerly returning 'nil' in this case
// is not sufficient. valid data members may return nil and therefore there must be some
// way to know the member just doesn't exist.
translator.ThrowError(luaState, "unknown member name " + methodName);
LuaLib.LuaPushNil(luaState);
}
// push false because we are NOT returning a function (see luaIndexFunction)
translator.Push(luaState, false);
return(2);
}