/*
* This file is part of LuaInterface.
*
* Copyright (C) 2003-2005 Fabio Mascarenhas de Queiroz.
* Copyright (C) 2012 Megax
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
using System;
using System.IO;
using System.Collections;
using System.Reflection;
using System.Diagnostics;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using LuaInterface.Method;
using LuaInterface.Extensions;
namespace LuaInterface
{
using LuaCore = KopiLua.Lua;
/*
* Functions used in the metatables of userdata representing
* CLR objects
*
* Author: Fabio Mascarenhas
* Version: 1.0
*/
class MetaFunctions
{
internal LuaCore.lua_CFunction gcFunction, indexFunction, newindexFunction, baseIndexFunction,
classIndexFunction, classNewindexFunction, execDelegateFunction, callConstructorFunction, toStringFunction;
private Hashtable memberCache = new Hashtable();
private ObjectTranslator translator;
/*
* __index metafunction for CLR objects. Implemented in Lua.
*/
internal static string luaIndexFunction =
"local function index(obj,name) \n" +
" local meta=getmetatable(obj) \n" +
" local cached=meta.cache[name] \n" +
" if cached~=nil then \n" +
" return cached \n" +
" else \n" +
" local value,isFunc=get_object_member(obj,name) \n" +
" if isFunc then \n" +
" meta.cache[name]=value \n" +
" end \n" +
" return value \n" +
" end \n" +
"end \n" +
"return index ";
public MetaFunctions(ObjectTranslator translator)
{
this.translator = translator;
gcFunction = new LuaCore.lua_CFunction(this.collectObject);
toStringFunction = new LuaCore.lua_CFunction(this.toString);
indexFunction = new LuaCore.lua_CFunction(this.getMethod);
newindexFunction = new LuaCore.lua_CFunction(this.setFieldOrProperty);
baseIndexFunction = new LuaCore.lua_CFunction(this.getBaseMethod);
callConstructorFunction = new LuaCore.lua_CFunction(this.callConstructor);
classIndexFunction = new LuaCore.lua_CFunction(this.getClassMethod);
classNewindexFunction = new LuaCore.lua_CFunction(this.setClassFieldOrProperty);
execDelegateFunction = new LuaCore.lua_CFunction(this.runFunctionDelegate);
}
/*
* __call metafunction of CLR delegates, retrieves and calls the delegate.
*/
private int runFunctionDelegate(LuaCore.lua_State luaState)
{
LuaCore.lua_CFunction func = (LuaCore.lua_CFunction)translator.getRawNetObject(luaState, 1);
LuaLib.lua_remove(luaState, 1);
return func(luaState);
}
/*
* __gc metafunction of CLR objects.
*/
private int collectObject(LuaCore.lua_State luaState)
{
int udata = LuaLib.luanet_rawnetobj(luaState, 1);
if(udata != -1)
translator.collectObject(udata);
else
{
// Debug.WriteLine("not found: " + udata);
}
return 0;
}
/*
* __tostring metafunction of CLR objects.
*/
private int toString(LuaCore.lua_State luaState)
{
object obj = translator.getRawNetObject(luaState, 1);
if(!obj.IsNull())
translator.push(luaState, obj.ToString() + ": " + obj.GetHashCode());
else
LuaLib.lua_pushnil(luaState);
return 1;
}
///
/// Debug tool to dump the lua stack
///
/// FIXME, move somewhere else
public static void dumpStack(ObjectTranslator translator, LuaCore.lua_State luaState)
{
int depth = LuaLib.lua_gettop(luaState);
Debug.WriteLine("lua stack depth: " + depth);
for(int i = 1; i <= depth; i++)
{
var type = LuaLib.lua_type(luaState, i);
// we dump stacks when deep in calls, calling typename while the stack is in flux can fail sometimes, so manually check for key types
string typestr = (type == LuaTypes.Table) ? "table" : LuaLib.lua_typename(luaState, type);
string strrep = LuaLib.lua_tostring(luaState, i).ToString();
if(type == LuaTypes.UserData)
{
object obj = translator.getRawNetObject(luaState, i);
strrep = obj.ToString();
}
Debug.Print("{0}: ({1}) {2}", i, typestr, strrep);
}
}
/*
* Called by the __index metafunction of CLR objects in case the
* method is not cached or it is a field/property/event.
* Receives the object and the member name as arguments and returns
* either the value of the member or a delegate to call it.
* If the member does not exist returns nil.
*/
private int getMethod(LuaCore.lua_State luaState)
{
object obj = translator.getRawNetObject(luaState, 1);
if(obj.IsNull())
{
translator.throwError(luaState, "trying to index an invalid object reference");
LuaLib.lua_pushnil(luaState);
return 1;
}
object index = translator.getObject(luaState, 2);
//var indexType = index.GetType();
string methodName = index as string; // will be null if not a string arg
var objType = obj.GetType();
// Handle the most common case, looking up the method by name.
// CP: This will fail when using indexers and attempting to get a value with the same name as a property of the object,
// ie: xmlelement['item'] <- item is a property of xmlelement
try
{
if(!methodName.IsNull() && isMemberPresent(objType, methodName))
return getMember(luaState, objType, obj, methodName, BindingFlags.Instance | BindingFlags.IgnoreCase);
}
catch
{
}
// Try to access by array if the type is right and index is an int (lua numbers always come across as double)
if(objType.IsArray && index is double)
{
int intIndex = (int)((double)index);
if(objType.UnderlyingSystemType == typeof(float[]))
{
float[] arr = ((float[])obj);
translator.push(luaState, arr[intIndex]);
}
else if(objType.UnderlyingSystemType == typeof(double[]))
{
double[] arr = ((double[])obj);
translator.push(luaState, arr[intIndex]);
}
else if(objType.UnderlyingSystemType == typeof(int[]))
{
int[] arr = ((int[])obj);
translator.push(luaState, arr[intIndex]);
}
else
{
object[] arr = (object[])obj;
translator.push(luaState, arr[intIndex]);
}
}
else
{
// Try to use get_Item to index into this .net object
//MethodInfo getter = objType.GetMethod("get_Item");
var methods = objType.GetMethods();
foreach(var mInfo in methods)
{
if(mInfo.Name == "get_Item")
{
//check if the signature matches the input
if(mInfo.GetParameters().Length == 1)
{
var getter = mInfo;
var actualParms = (!getter.IsNull()) ? getter.GetParameters() : null;
if(actualParms.IsNull() || actualParms.Length != 1)
{
translator.throwError(luaState, "method not found (or no indexer): " + index);
LuaLib.lua_pushnil(luaState);
}
else
{
// Get the index in a form acceptable to the getter
index = translator.getAsType(luaState, 2, actualParms[0].ParameterType);
object[] args = new object[1];
// Just call the indexer - if out of bounds an exception will happen
args[0] = index;
try
{
object result = getter.Invoke(obj, args);
translator.push(luaState, result);
}
catch(TargetInvocationException e)
{
// Provide a more readable description for the common case of key not found
if(e.InnerException is KeyNotFoundException)
translator.throwError(luaState, "key '" + index + "' not found ");
else
translator.throwError(luaState, "exception indexing '" + index + "' " + e.Message);
LuaLib.lua_pushnil(luaState);
}
}
}
}
}
}
LuaLib.lua_pushboolean(luaState, false);
return 2;
}
/*
* __index metafunction of base classes (the base field of Lua tables).
* Adds a prefix to the method name to call the base version of the method.
*/
private int getBaseMethod(LuaCore.lua_State luaState)
{
object obj = translator.getRawNetObject(luaState, 1);
if(obj.IsNull())
{
translator.throwError(luaState, "trying to index an invalid object reference");
LuaLib.lua_pushnil(luaState);
LuaLib.lua_pushboolean(luaState, false);
return 2;
}
string methodName = LuaLib.lua_tostring(luaState, 2).ToString();
if(methodName.IsNull())
{
LuaLib.lua_pushnil(luaState);
LuaLib.lua_pushboolean(luaState, false);
return 2;
}
getMember(luaState, obj.GetType(), obj, "__luaInterface_base_" + methodName, BindingFlags.Instance | BindingFlags.IgnoreCase);
LuaLib.lua_settop(luaState, -2);
if(LuaLib.lua_type(luaState, -1) == LuaTypes.Nil)
{
LuaLib.lua_settop(luaState, -2);
return getMember(luaState, obj.GetType(), obj, methodName, BindingFlags.Instance | BindingFlags.IgnoreCase);
}
LuaLib.lua_pushboolean(luaState, false);
return 2;
}
///
/// Does this method exist as either an instance or static?
///
///
///
///
bool isMemberPresent(IReflect objType, string methodName)
{
object cachedMember = checkMemberCache(memberCache, objType, methodName);
if(!cachedMember.IsNull())
return true;
//CP: Removed NonPublic binding search
var members = objType.GetMember(methodName, BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase/* | BindingFlags.NonPublic*/);
return (members.Length > 0);
}
/*
* 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(LuaCore.lua_State 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 LuaCore.lua_CFunction)
{
translator.pushFunction(luaState, (LuaCore.lua_CFunction)cachedMember);
translator.push(luaState, true);
return 2;
}
else if(!cachedMember.IsNull())
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.IsNull())
{
if(member.MemberType == MemberTypes.Field)
{
var field = (FieldInfo)member;
if(cachedMember.IsNull())
setMemberCache(memberCache, objType, methodName, member);
try
{
translator.push(luaState, field.GetValue(obj));
}
catch
{
LuaLib.lua_pushnil(luaState);
}
}
else if(member.MemberType == MemberTypes.Property)
{
var property = (PropertyInfo)member;
if(cachedMember.IsNull())
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.lua_pushnil(luaState);
}
catch(TargetInvocationException e) // Convert this exception into a Lua error
{
ThrowError(luaState, e);
LuaLib.lua_pushnil(luaState);
}
}
else if(member.MemberType == MemberTypes.Event)
{
var eventInfo = (EventInfo)member;
if(cachedMember.IsNull())
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.IsNull())
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 LuaCore.lua_CFunction((new LuaMethodWrapper(translator, objType, methodName, bindingType)).call);
if(cachedMember.IsNull())
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.lua_pushnil(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.lua_pushnil(luaState);
}
// push false because we are NOT returning a function (see luaIndexFunction)
translator.push(luaState, false);
return 2;
}
/*
* Checks if a MemberInfo object is cached, returning it or null.
*/
private object checkMemberCache(Hashtable memberCache, IReflect objType, string memberName)
{
var members = (Hashtable)memberCache[objType];
return !members.IsNull() ? members[memberName] : null;
}
/*
* Stores a MemberInfo object in the member cache.
*/
private void setMemberCache(Hashtable memberCache, IReflect objType, string memberName, object member)
{
var members = (Hashtable)memberCache[objType];
if(members.IsNull())
{
members = new Hashtable();
memberCache[objType] = members;
}
members[memberName] = member;
}
/*
* __newindex metafunction of CLR objects. Receives the object,
* the member name and the value to be stored as arguments. Throws
* and error if the assignment is invalid.
*/
private int setFieldOrProperty(LuaCore.lua_State luaState)
{
object target = translator.getRawNetObject(luaState, 1);
if(target.IsNull())
{
translator.throwError(luaState, "trying to index and invalid object reference");
return 0;
}
var type = target.GetType();
// First try to look up the parameter as a property name
string detailMessage;
bool didMember = trySetMember(luaState, type, target, BindingFlags.Instance | BindingFlags.IgnoreCase, out detailMessage);
if(didMember)
return 0; // Must have found the property name
// We didn't find a property name, now see if we can use a [] style this accessor to set array contents
try
{
if(type.IsArray && LuaLib.lua_isnumber(luaState, 2))
{
int index = (int)LuaLib.lua_tonumber(luaState, 2);
var arr = (Array)target;
object val = translator.getAsType(luaState, 3, arr.GetType().GetElementType());
arr.SetValue(val, index);
}
else
{
// Try to see if we have a this[] accessor
var setter = type.GetMethod("set_Item");
if(!setter.IsNull())
{
var args = setter.GetParameters();
var valueType = args[1].ParameterType;
// The new val ue the user specified
object val = translator.getAsType(luaState, 3, valueType);
var indexType = args[0].ParameterType;
object index = translator.getAsType(luaState, 2, indexType);
object[] methodArgs = new object[2];
// Just call the indexer - if out of bounds an exception will happen
methodArgs[0] = index;
methodArgs[1] = val;
setter.Invoke(target, methodArgs);
}
else
translator.throwError(luaState, detailMessage); // Pass the original message from trySetMember because it is probably best
}
}
catch(SEHException)
{
// If we are seeing a C++ exception - this must actually be for Lua's private use. Let it handle it
throw;
}
catch(Exception e)
{
ThrowError(luaState, e);
}
return 0;
}
///
/// Tries to set a named property or field
///
///
///
///
///
/// false if unable to find the named member, true for success
private bool trySetMember(LuaCore.lua_State luaState, IReflect targetType, object target, BindingFlags bindingType, out string detailMessage)
{
detailMessage = null; // No error yet
// If not already a string just return - we don't want to call tostring - which has the side effect of
// changing the lua typecode to string
// Note: We don't use isstring because the standard lua C isstring considers either strings or numbers to
// be true for isstring.
if(LuaLib.lua_type(luaState, 2) != LuaTypes.String)
{
detailMessage = "property names must be strings";
return false;
}
// We only look up property names by string
string fieldName = LuaLib.lua_tostring(luaState, 2).ToString();
if(fieldName.IsNull() || fieldName.Length < 1 || !(char.IsLetter(fieldName[0]) || fieldName[0] == '_'))
{
detailMessage = "invalid property name";
return false;
}
// Find our member via reflection or the cache
var member = (MemberInfo)checkMemberCache(memberCache, targetType, fieldName);
if(member.IsNull())
{
//CP: Removed NonPublic binding search and made case insensitive
var members = targetType.GetMember(fieldName, bindingType | BindingFlags.Public | BindingFlags.IgnoreCase/*| BindingFlags.NonPublic*/);
if(members.Length > 0)
{
member = members[0];
setMemberCache(memberCache, targetType, fieldName, member);
}
else
{
detailMessage = "field or property '" + fieldName + "' does not exist";
return false;
}
}
if(member.MemberType == MemberTypes.Field)
{
var field = (FieldInfo)member;
object val = translator.getAsType(luaState, 3, field.FieldType);
try
{
field.SetValue(target, val);
}
catch (Exception e)
{
ThrowError(luaState, e);
}
// We did a call
return true;
}
else if(member.MemberType == MemberTypes.Property)
{
var property = (PropertyInfo)member;
object val = translator.getAsType(luaState, 3, property.PropertyType);
try
{
property.SetValue(target, val, null);
}
catch (Exception e)
{
ThrowError(luaState, e);
}
// We did a call
return true;
}
detailMessage = "'" + fieldName + "' is not a .net field or property";
return false;
}
/*
* Writes to fields or properties, either static or instance. Throws an error
* if the operation is invalid.
*/
private int setMember(LuaCore.lua_State luaState, IReflect targetType, object target, BindingFlags bindingType)
{
string detail;
bool success = trySetMember(luaState, targetType, target, bindingType, out detail);
if(!success)
translator.throwError(luaState, detail);
return 0;
}
///
/// Convert a C# exception into a Lua error
///
///
/// We try to look into the exception to give the most meaningful description
void ThrowError(LuaCore.lua_State luaState, Exception e)
{
// If we got inside a reflection show what really happened
var te = e as TargetInvocationException;
if (!te.IsNull())
e = te.InnerException;
translator.throwError(luaState, e);
}
/*
* __index metafunction of type references, works on static members.
*/
private int getClassMethod(LuaCore.lua_State luaState)
{
IReflect klass;
object obj = translator.getRawNetObject(luaState, 1);
if(obj.IsNull() || !(obj is IReflect))
{
translator.throwError(luaState, "trying to index an invalid type reference");
LuaLib.lua_pushnil(luaState);
return 1;
}
else
klass = (IReflect)obj;
if(LuaLib.lua_isnumber(luaState, 2))
{
int size = (int)LuaLib.lua_tonumber(luaState, 2);
translator.push(luaState, Array.CreateInstance(klass.UnderlyingSystemType, size));
return 1;
}
else
{
string methodName = LuaLib.lua_tostring(luaState, 2).ToString();
if(methodName.IsNull())
{
LuaLib.lua_pushnil(luaState);
return 1;
} //CP: Ignore case
else
return getMember(luaState, klass, null, methodName, BindingFlags.FlattenHierarchy | BindingFlags.Static | BindingFlags.IgnoreCase);
}
}
/*
* __newindex function of type references, works on static members.
*/
private int setClassFieldOrProperty(LuaCore.lua_State luaState)
{
IReflect target;
object obj = translator.getRawNetObject(luaState, 1);
if(obj.IsNull() || !(obj is IReflect))
{
translator.throwError(luaState, "trying to index an invalid type reference");
return 0;
}
else
target = (IReflect)obj;
return setMember(luaState, target, null, BindingFlags.FlattenHierarchy | BindingFlags.Static | BindingFlags.IgnoreCase);
}
/*
* __call metafunction of type references. Searches for and calls
* a constructor for the type. Returns nil if the constructor is not
* found or if the arguments are invalid. Throws an error if the constructor
* generates an exception.
*/
private int callConstructor(LuaCore.lua_State luaState)
{
var validConstructor = new MethodCache();
IReflect klass;
object obj = translator.getRawNetObject(luaState, 1);
if(obj.IsNull() || !(obj is IReflect))
{
translator.throwError(luaState, "trying to call constructor on an invalid type reference");
LuaLib.lua_pushnil(luaState);
return 1;
}
else
klass = (IReflect)obj;
LuaLib.lua_remove(luaState, 1);
var constructors = klass.UnderlyingSystemType.GetConstructors();
foreach(var constructor in constructors)
{
bool isConstructor = matchParameters(luaState, constructor, ref validConstructor);
if(isConstructor)
{
try
{
translator.push(luaState, constructor.Invoke(validConstructor.args));
}
catch(TargetInvocationException e)
{
ThrowError(luaState, e);
LuaLib.lua_pushnil(luaState);
}
catch
{
LuaLib.lua_pushnil(luaState);
}
return 1;
}
}
string constructorName = (constructors.Length == 0) ? "unknown" : constructors[0].Name;
translator.throwError(luaState, String.Format("{0} does not contain constructor({1}) argument match",
klass.UnderlyingSystemType, constructorName));
LuaLib.lua_pushnil(luaState);
return 1;
}
/*
* Matches a method against its arguments in the Lua stack. Returns
* if the match was succesful. It it was also returns the information
* necessary to invoke the method.
*/
internal bool matchParameters(LuaCore.lua_State luaState, MethodBase method, ref MethodCache methodCache)
{
ExtractValue extractValue;
bool isMethod = true;
var paramInfo = method.GetParameters();
int currentLuaParam = 1;
int nLuaParams = LuaLib.lua_gettop(luaState);
var paramList = new ArrayList();
var outList = new List();
var argTypes = new List();
foreach(var currentNetParam in paramInfo)
{
if(!currentNetParam.IsIn && currentNetParam.IsOut) // Skips out params
outList.Add(paramList.Add(null));
else if(currentLuaParam > nLuaParams) // Adds optional parameters
{
if(currentNetParam.IsOptional)
paramList.Add(currentNetParam.DefaultValue);
else
{
isMethod = false;
break;
}
}
else if(_IsTypeCorrect(luaState, currentLuaParam, currentNetParam, out extractValue)) // Type checking
{
int index = paramList.Add(extractValue(luaState, currentLuaParam));
var methodArg = new MethodArgs();
methodArg.index = index;
methodArg.extractValue = extractValue;
argTypes.Add(methodArg);
if(currentNetParam.ParameterType.IsByRef)
outList.Add(index);
currentLuaParam++;
} // Type does not match, ignore if the parameter is optional
else if(_IsParamsArray(luaState, currentLuaParam, currentNetParam, out extractValue))
{
object luaParamValue = extractValue(luaState, currentLuaParam);
var paramArrayType = currentNetParam.ParameterType.GetElementType();
Array paramArray;
if(luaParamValue is LuaTable)
{
var table = (LuaTable)luaParamValue;
var tableEnumerator = table.GetEnumerator();
paramArray = Array.CreateInstance(paramArrayType, table.Values.Count);
tableEnumerator.Reset();
int paramArrayIndex = 0;
while(tableEnumerator.MoveNext())
{
paramArray.SetValue(Convert.ChangeType(tableEnumerator.Value, currentNetParam.ParameterType.GetElementType()), paramArrayIndex);
paramArrayIndex++;
}
}
else
{
paramArray = Array.CreateInstance(paramArrayType, 1);
paramArray.SetValue(luaParamValue, 0);
}
int index = paramList.Add(paramArray);
var methodArg = new MethodArgs();
methodArg.index = index;
methodArg.extractValue = extractValue;
methodArg.isParamsArray = true;
methodArg.paramsArrayType = paramArrayType;
argTypes.Add(methodArg);
currentLuaParam++;
}
else if(currentNetParam.IsOptional)
paramList.Add(currentNetParam.DefaultValue);
else // No match
{
isMethod = false;
break;
}
}
if(currentLuaParam != nLuaParams + 1) // Number of parameters does not match
isMethod = false;
if(isMethod)
{
methodCache.args = paramList.ToArray();
methodCache.cachedMethod = method;
methodCache.outList = outList.ToArray();
methodCache.argTypes = argTypes.ToArray();
}
return isMethod;
}
///
/// CP: Fix for operator overloading failure
/// Returns true if the type is set and assigns the extract value
///
///
///
///
///
///
private bool _IsTypeCorrect(LuaCore.lua_State luaState, int currentLuaParam, ParameterInfo currentNetParam, out ExtractValue extractValue)
{
try
{
return (extractValue = translator.typeChecker.checkType(luaState, currentLuaParam, currentNetParam.ParameterType)) != null;
}
catch
{
extractValue = null;
Debug.WriteLine("Type wasn't correct");
return false;
}
}
private bool _IsParamsArray(LuaCore.lua_State luaState, int currentLuaParam, ParameterInfo currentNetParam, out ExtractValue extractValue)
{
extractValue = null;
if (currentNetParam.GetCustomAttributes(typeof(ParamArrayAttribute), false).Length > 0)
{
LuaTypes luaType;
try
{
luaType = LuaLib.lua_type(luaState, currentLuaParam);
}
catch(Exception ex)
{
Debug.WriteLine("Could not retrieve lua type while attempting to determine params Array Status.");
Debug.WriteLine(ex.Message);
extractValue = null;
return false;
}
if(luaType == LuaTypes.Table)
{
try
{
extractValue = translator.typeChecker.getExtractor(typeof(LuaTable));
}
catch(Exception/* ex*/)
{
Debug.WriteLine("An error occurred during an attempt to retrieve a LuaTable extractor while checking for params array status.");
}
if(!extractValue.IsNull())
{
return true;
}
}
else
{
var paramElementType = currentNetParam.ParameterType.GetElementType();
try
{
extractValue = translator.typeChecker.checkType(luaState, currentLuaParam, paramElementType);
}
catch (Exception/* ex*/)
{
Debug.WriteLine(string.Format("An error occurred during an attempt to retrieve an extractor ({0}) while checking for params array status.", paramElementType.FullName));
}
if(!extractValue.IsNull())
{
return true;
}
}
}
Debug.WriteLine("Type wasn't Params object.");
return false;
}
}
}