private static IEnumerable <ReflectionFunctionBinding> CreateBindingsFromContainer(object container)
{
List <ReflectionFunctionBinding> bindings = new List <ReflectionFunctionBinding>();
foreach (MethodInfo methodInfo in container.GetType().GetMethods())
{
object instance;
if (methodInfo.IsStatic)
{
instance = null;
}
else
{
instance = container;
}
FunctionBindingAttribute[] functionBindingAttributes = (FunctionBindingAttribute[])methodInfo.GetCustomAttributes(typeof(FunctionBindingAttribute), false);
if (functionBindingAttributes.Length == 1)
{
string functionName = functionBindingAttributes[0].Name;
bool isDeterministic = functionBindingAttributes[0].IsDeterministic;
ReflectionFunctionBinding reflectionFunctionBinding = new ReflectionFunctionBinding(functionName, methodInfo, instance, isDeterministic);
bindings.Add(reflectionFunctionBinding);
}
}
return(bindings);
}
private void RemoveFromContainer(IEnumerable <ReflectionFunctionBinding> containerBindings)
{
List <FunctionBinding> bindigsToRemove = new List <FunctionBinding>();
foreach (FunctionBinding functionBinding in this)
{
ReflectionFunctionBinding reflectionFunctionBinding = functionBinding as ReflectionFunctionBinding;
if (reflectionFunctionBinding != null)
{
foreach (ReflectionFunctionBinding containerBinding in containerBindings)
{
if (reflectionFunctionBinding.Method == containerBinding.Method)
{
bindigsToRemove.Add(functionBinding);
break;
}
}
}
}
foreach (FunctionBinding binding in bindigsToRemove)
{
Remove(binding);
}
}
public FunctionBinding Add(string functionName, Delegate functionDelegate)
{
if (functionName == null)
{
throw ExceptionBuilder.ArgumentNull("functionName");
}
if (functionDelegate == null)
{
throw ExceptionBuilder.ArgumentNull("functionDelegate");
}
// Check return type
if (functionDelegate.Method.ReturnType == typeof(void))
{
throw ExceptionBuilder.FunctionMustNotBeVoid(functionDelegate);
}
// Check parameters
ParameterInfo[] parameters = functionDelegate.Method.GetParameters();
foreach (ParameterInfo param in parameters)
{
if (param.IsOut || param.ParameterType.IsByRef)
{
throw ExceptionBuilder.FunctionMustNotHaveRefOrOutParams(functionDelegate, param);
}
if (param.IsOptional)
{
throw ExceptionBuilder.FunctionMustNotHaveOptionalParams(functionDelegate, param);
}
if (param.ParameterType.IsArray)
{
throw ExceptionBuilder.FunctionMustNotHaveArrayParams(functionDelegate, param);
}
}
// Ok, everything seems to be fine.
ReflectionFunctionBinding reflectionFunctionBinding = new ReflectionFunctionBinding(functionName, functionDelegate.Method, functionDelegate.Target, false);
Add(reflectionFunctionBinding);
return(reflectionFunctionBinding);
}
public override ExpressionNode VisitFunctionInvocationExpression(FunctionInvocationExpression expression)
{
base.VisitFunctionInvocationExpression(expression);
ReflectionFunctionBinding reflectionFunctionBinding = expression.Function as ReflectionFunctionBinding;
if (reflectionFunctionBinding != null)
{
if (reflectionFunctionBinding.Instance != null)
{
_ilEmitContext.AddParameter(expression, reflectionFunctionBinding.Instance, reflectionFunctionBinding.Instance.GetType());
}
}
else
{
_ilEmitContext.AddParameter(expression, expression.Function, typeof(FunctionBinding));
object[] args = new object[expression.Arguments.Length];
_ilEmitContext.AddParameter(expression, args, typeof(object[]));
}
return(expression);
}
public override ExpressionNode VisitFunctionInvocationExpression(FunctionInvocationExpression expression)
{
ReflectionFunctionBinding reflectionFunctionBinding = expression.Function as ReflectionFunctionBinding;
if (reflectionFunctionBinding != null)
{
MethodInfo method = reflectionFunctionBinding.Method;
ParameterInfo[] parameterInfos = method.GetParameters();
ILParameterDeclaration instance;
if (reflectionFunctionBinding.Instance != null)
{
instance = _ilEmitContext.GetParameters(expression)[0];
}
else
{
instance = null;
}
int[] argLocalIndexes = new int[expression.Arguments.Length];
for (int i = 0; i < expression.Arguments.Length; i++)
{
argLocalIndexes[i] = DeclareLocal();
}
for (int i = 0; i < expression.Arguments.Length; i++)
{
Visit(expression.Arguments[i]);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, argLocalIndexes[i]);
}
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
for (int i = 0; i < expression.Arguments.Length; i++)
{
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argLocalIndexes[i]);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
}
if (instance != null)
{
EmitLoadParameter(instance);
EmitThisArgumentPointer(instance.Type);
}
for (int i = 0; i < expression.Arguments.Length; i++)
{
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argLocalIndexes[i]);
if (parameterInfos[i].ParameterType != typeof(object))
{
EmitConversion(parameterInfos[i].ParameterType);
}
}
EmitRawCall(method, instance == null ? null : instance.Type);
if (method.ReturnType.IsValueType)
{
_ilEmitContext.ILGenerator.Emit(OpCodes.Box, method.ReturnType);
}
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
else
{
int[] argLocalIndexes = new int[expression.Arguments.Length];
for (int i = 0; i < expression.Arguments.Length; i++)
{
argLocalIndexes[i] = DeclareLocal();
}
for (int i = 0; i < expression.Arguments.Length; i++)
{
Visit(expression.Arguments[i]);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, argLocalIndexes[i]);
}
Label loadNullLabel = _ilEmitContext.ILGenerator.DefineLabel();
Label finishLabel = _ilEmitContext.ILGenerator.DefineLabel();
for (int i = 0; i < expression.Arguments.Length; i++)
{
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argLocalIndexes[i]);
_ilEmitContext.ILGenerator.Emit(OpCodes.Brfalse, loadNullLabel);
}
ILParameterDeclaration customFunctionBinding = _ilEmitContext.GetParameters(expression)[0];
ILParameterDeclaration argsArray = _ilEmitContext.GetParameters(expression)[1];
int argsArrayIndex = DeclareLocal();
EmitLoadParameter(argsArray);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stloc, argsArrayIndex);
for (int i = 0; i < expression.Arguments.Length; i++)
{
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argsArrayIndex);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldc_I4, i);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argLocalIndexes[i]);
_ilEmitContext.ILGenerator.Emit(OpCodes.Stelem_Ref);
}
EmitLoadParameter(customFunctionBinding);
EmitThisArgumentPointer(typeof(FunctionBinding));
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldloc, argsArrayIndex);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Callvirt, _functionBindingInvokeMethod, null);
_ilEmitContext.ILGenerator.EmitCall(OpCodes.Call, _unifyNullsMethod, null);
_ilEmitContext.ILGenerator.Emit(OpCodes.Br, finishLabel);
_ilEmitContext.ILGenerator.MarkLabel(loadNullLabel);
_ilEmitContext.ILGenerator.Emit(OpCodes.Ldnull);
_ilEmitContext.ILGenerator.MarkLabel(finishLabel);
}
return(expression);
}
