internal DelegateInfo(MethodInfo method, object[] constants, DelegateSignatureInfo sigInfo) {
Assert.NotNull(method, constants);
_method = method;
_constants = constants;
_sigInfo = sigInfo;
}
public Delegate GetOrCreateDelegateForDynamicObject(object dynamicObject, Type delegateType, MethodInfo invoke)
{
var signatureInfo = new DelegateSignatureInfo(invoke);
DelegateInfo delegateInfo = _dynamicDelegateCache.GetOrCreateValue(
signatureInfo,
() => new DelegateInfo(_languageContext, signatureInfo.ReturnType, signatureInfo.ParameterTypes)
);
return(delegateInfo.CreateDelegate(delegateType, dynamicObject));
}
/// <summary>
/// Creates a delegate with a given signature that could be used to invoke this object from non-dynamic code (w/o code context).
/// A stub is created that makes appropriate conversions/boxing and calls the object.
/// The stub should be executed within a context of this object's language.
/// </summary>
/// <returns>The delegate or a <c>null</c> reference if the object is not callable.</returns>
public static Delegate GetDelegate(LanguageContext context, object callableObject, Type delegateType)
{
ContractUtils.RequiresNotNull(context, "context");
ContractUtils.RequiresNotNull(delegateType, "delegateType");
Delegate result = callableObject as Delegate;
if (result != null)
{
if (!delegateType.IsAssignableFrom(result.GetType()))
{
throw ScriptingRuntimeHelpers.SimpleTypeError(String.Format("Cannot cast {0} to {1}.", result.GetType(), delegateType));
}
return(result);
}
IDynamicObject dynamicObject = callableObject as IDynamicObject;
if (dynamicObject != null)
{
MethodInfo invoke;
if (!typeof(Delegate).IsAssignableFrom(delegateType) || (invoke = delegateType.GetMethod("Invoke")) == null)
{
throw ScriptingRuntimeHelpers.SimpleTypeError("A specific delegate type is required.");
}
ParameterInfo[] parameters = invoke.GetParameters();
DelegateSignatureInfo signatureInfo = new DelegateSignatureInfo(
context,
invoke.ReturnType,
parameters
);
DelegateInfo delegateInfo = _dynamicDelegateCache.GetOrCreateValue(signatureInfo,
delegate() {
// creation code
return(signatureInfo.GenerateDelegateStub());
});
result = delegateInfo.CreateDelegate(delegateType, dynamicObject);
if (result != null)
{
return(result);
}
}
throw ScriptingRuntimeHelpers.SimpleTypeError("Object is not callable.");
}
/// <summary>
/// Creates a delegate with a given signature that could be used to invoke this object from non-dynamic code (w/o code context).
/// A stub is created that makes appropriate conversions/boxing and calls the object.
/// The stub should be executed within a context of this object's language.
/// </summary>
/// <returns>The converted delegate.</returns>
/// <exception cref="T:Microsoft.Scripting.ArgumentTypeException">The object is either a subclass of Delegate but not the requested type or does not implement IDynamicMetaObjectProvider.</exception>
public Delegate GetDelegate(object callableObject, Type delegateType) {
ContractUtils.RequiresNotNull(delegateType, "delegateType");
Delegate result = callableObject as Delegate;
if (result != null) {
if (!delegateType.IsAssignableFrom(result.GetType())) {
throw ScriptingRuntimeHelpers.SimpleTypeError(String.Format("Cannot cast {0} to {1}.", result.GetType(), delegateType));
}
return result;
}
IDynamicMetaObjectProvider dynamicObject = callableObject as IDynamicMetaObjectProvider;
if (dynamicObject != null) {
MethodInfo invoke;
if (!typeof(Delegate).IsAssignableFrom(delegateType) || (invoke = delegateType.GetMethod("Invoke")) == null) {
throw ScriptingRuntimeHelpers.SimpleTypeError("A specific delegate type is required.");
}
ParameterInfo[] parameters = invoke.GetParameters();
DelegateSignatureInfo signatureInfo = new DelegateSignatureInfo(
invoke.ReturnType,
parameters
);
DelegateInfo delegateInfo = _dynamicDelegateCache.GetOrCreateValue(signatureInfo,
delegate() {
// creation code
return signatureInfo.GenerateDelegateStub(_languageContext);
});
result = delegateInfo.CreateDelegate(delegateType, dynamicObject);
if (result != null) {
return result;
}
}
throw ScriptingRuntimeHelpers.SimpleTypeError("Object is not callable.");
}
public override bool Equals(object obj)
{
DelegateSignatureInfo dsi = obj as DelegateSignatureInfo;
if (dsi == null ||
dsi._parameterTypes.Length != _parameterTypes.Length ||
dsi._returnType != _returnType)
{
return(false);
}
for (int i = 0; i < _parameterTypes.Length; i++)
{
if (dsi._parameterTypes[i] != _parameterTypes[i])
{
return(false);
}
}
return(true);
}
