private void GenerateInvokeMethodReturn(DomainOperationEntry domainOperationEntry, string parameterDictionaryString, InvokeKind invokeKind)
{
InvokeAttribute invokeAttribute = (InvokeAttribute)domainOperationEntry.OperationAttribute;
string returnTypeNameString = CodeGenUtilities.GetTypeName(CodeGenUtilities.TranslateType(domainOperationEntry.ReturnType));
if (invokeKind == InvokeKind.Async)
{
returnTypeNameString = (domainOperationEntry.ReturnType == typeof(void)) ? string.Empty : string.Format("<{0}>", returnTypeNameString);
this.Write("return this.InvokeOperationAsync");
this.Write(this.ToStringHelper.ToStringWithCulture(returnTypeNameString));
this.Write("(\"");
this.Write(this.ToStringHelper.ToStringWithCulture(domainOperationEntry.Name));
this.Write("\", ");
this.Write(this.ToStringHelper.ToStringWithCulture(parameterDictionaryString));
this.Write(", \r\n");
this.Write(this.ToStringHelper.ToStringWithCulture(CodeGenUtilities.GetBooleanString(invokeAttribute.HasSideEffects, true)));
this.Write(", cancellationToken);\r\n");
}
else
{
this.Write("return this.");
this.Write(this.ToStringHelper.ToStringWithCulture(this.GetInvokeMethodReturnTypeName(domainOperationEntry, invokeKind)));
this.Write("(\"");
this.Write(this.ToStringHelper.ToStringWithCulture(domainOperationEntry.Name));
this.Write("\", typeof(");
this.Write(this.ToStringHelper.ToStringWithCulture(returnTypeNameString));
this.Write("), ");
this.Write(this.ToStringHelper.ToStringWithCulture(parameterDictionaryString));
this.Write(", \r\n");
this.Write(this.ToStringHelper.ToStringWithCulture(CodeGenUtilities.GetBooleanString(invokeAttribute.HasSideEffects, true)));
this.Write(",\r\n");
if (invokeKind == InvokeKind.WithCallback)
{
this.Write("callback, userState);\r\n");
}
else
{
this.Write("null, null);\r\n");
}
}
}
/// <summary>
/// Generates an invoke operation.
/// </summary>
/// <param name="domainOperationEntry">The invoke operation.</param>
/// <param name="invokeKind">the type of invoke method to generate.</param>
private void GenerateInvokeOperation(DomainOperationEntry domainOperationEntry, InvokeKind invokeKind)
{
// Determine the name of the generated invoke function
string methodName = domainOperationEntry.Name;
// ----------------------------------------------------------------
// Check for name conflicts
// ----------------------------------------------------------------
if ((invokeKind == InvokeKind.WithCallback) && this._proxyClass.Members.Cast <CodeTypeMember>().Any(c => c.Name == methodName && c.GetType() != typeof(CodeMemberMethod)))
{
this.ClientProxyGenerator.LogError(
string.Format(CultureInfo.CurrentCulture,
Resource.ClientCodeGen_NamingCollision_MemberAlreadyExists,
this._proxyClass.Name,
methodName));
return;
}
// ----------------------------------------------------------------
// InvokeResult<T> InvokeOperation(args);
//
// InvokeResult<T> InvokeOperation(args, callback, userState);
//
// Task<T> InvokeOperationAsync(args);
// ----------------------------------------------------------------
CodeTypeReference operationReturnType = null;
Type returnType = CodeGenUtilities.TranslateType(domainOperationEntry.ReturnType);
var methodReturnTypeName = (invokeKind == InvokeKind.Async) ? TypeConstants.InvokeResultTypeFullName: TypeConstants.InvokeOperationTypeFullName;
CodeTypeReference invokeOperationType = CodeGenUtilities.GetTypeReference(methodReturnTypeName, (string)this._proxyClass.UserData["Namespace"], false);
if (returnType != typeof(void))
{
// If this is an enum type, we need to ensure it is either shared or
// can be generated. Failure to use this enum is only a warning and causes
// this invoke operation to be skipped. The test for legality also causes
// the enum to be generated if required.
Type enumType = TypeUtility.GetNonNullableType(returnType);
if (enumType.IsEnum)
{
string errorMessage = null;
if (!this.ClientProxyGenerator.CanExposeEnumType(enumType, out errorMessage))
{
this.ClientProxyGenerator.LogError(string.Format(CultureInfo.CurrentCulture,
Resource.ClientCodeGen_Domain_Op_Enum_Error,
methodName,
this._proxyClass.Name,
enumType.FullName,
errorMessage));
return;
}
else
{
// Register use of this enum type, which could cause deferred generation
this.ClientProxyGenerator.RegisterUseOfEnumType(enumType);
}
}
operationReturnType = CodeGenUtilities.GetTypeReference(returnType, this.ClientProxyGenerator, this._proxyClass);
operationReturnType.Options |= CodeTypeReferenceOptions.GenericTypeParameter;
invokeOperationType.TypeArguments.Add(operationReturnType);
}
// InvokeResults are wrapped in task (always)
if (invokeKind == InvokeKind.Async)
{
invokeOperationType = new CodeTypeReference(typeof(Task).FullName, invokeOperationType);
}
CodeMemberMethod method = new CodeMemberMethod()
{
Attributes = MemberAttributes.Public | MemberAttributes.Final,
Name = (invokeKind == InvokeKind.Async) ? (methodName + "Async") : methodName,
ReturnType = invokeOperationType,
};
this._proxyClass.Members.Add(method);
ReadOnlyCollection <DomainOperationParameter> operationParameters = domainOperationEntry.Parameters;
// Generate the <summary> doc comments
string comment = string.Format(CultureInfo.CurrentCulture, Resource.CodeGen_DomainContext_Invoke_Method_Summary_Comment, domainOperationEntry.Name);
method.Comments.AddRange(CodeGenUtilities.GenerateSummaryCodeComment(comment, this.ClientProxyGenerator.IsCSharp));
// Generate <param> doc comments
foreach (DomainOperationParameter parameter in operationParameters)
{
comment = string.Format(CultureInfo.CurrentCulture, Resource.CodeGen_DomainContext_Invoke_Method_Parameter_Comment, parameter.Name);
method.Comments.AddRange(CodeGenUtilities.GenerateParamCodeComment(parameter.Name, comment, this.ClientProxyGenerator.IsCSharp));
}
// Conditionally add the callback and userState <param> doc comments
if (invokeKind == InvokeKind.WithCallback)
{
method.Comments.AddRange(CodeGenUtilities.GenerateParamCodeComment("callback", Resource.CodeGen_DomainContext_Invoke_Method_Callback_Parameter_Comment, this.ClientProxyGenerator.IsCSharp));
method.Comments.AddRange(CodeGenUtilities.GenerateParamCodeComment("userState", Resource.CodeGen_DomainContext_Invoke_Method_UserState_Parameter_Comment, this.ClientProxyGenerator.IsCSharp));
}
else if (invokeKind == InvokeKind.Async)
{
method.Comments.AddRange(CodeGenUtilities.GenerateParamCodeComment("cancellationToken", Resource.CodeGen_DomainContext_Invoke_Method_CancellationToken_Parameter_Comment, this.ClientProxyGenerator.IsCSharp));
}
// Generate <returns> doc comments
method.Comments.AddRange(CodeGenUtilities.GenerateReturnsCodeComment(Resource.CodeGen_DomainContext_Invoke_Returns_Comment, this.ClientProxyGenerator.IsCSharp));
// Propagate custom validation attributes from the DomainOperationEntry to this invoke operation.
IEnumerable <Attribute> methodAttributes = domainOperationEntry.Attributes.Cast <Attribute>();
CustomAttributeGenerator.GenerateCustomAttributes(
this.ClientProxyGenerator,
this._proxyClass,
ex => string.Format(CultureInfo.CurrentCulture, Resource.ClientCodeGen_Attribute_ThrewException_CodeMethod, ex.Message, method.Name, this._proxyClass.Name, ex.InnerException.Message),
methodAttributes,
method.CustomAttributes,
method.Comments);
// ----------------------------------------------------------------
// generate invoke operation body:
// return base.InvokeOperation<T>(methodName, typeof(T), parameters, hasSideEffects, callback, userState);
// or return base.InvokeOperationAsync<T>(methodName, parameters, hasSideEffects);
// ----------------------------------------------------------------
List <CodeExpression> invokeParams = new List <CodeExpression>();
invokeParams.Add(new CodePrimitiveExpression(methodName));
// add the return Type parameter
if (invokeKind != InvokeKind.Async)
{
invokeParams.Add(new CodeTypeOfExpression(operationReturnType));
}
// add any operation parameters
CodeVariableReferenceExpression paramsRef = new CodeVariableReferenceExpression("parameters");
if (operationParameters.Count > 0)
{
// need to generate the user parameters dictionary
CodeTypeReference dictionaryTypeReference = CodeGenUtilities.GetTypeReference(
typeof(Dictionary <string, object>),
this.ClientProxyGenerator,
this._proxyClass);
CodeVariableDeclarationStatement paramsDef = new CodeVariableDeclarationStatement(
dictionaryTypeReference,
"parameters",
new CodeObjectCreateExpression(dictionaryTypeReference, Array.Empty <CodeExpression>()));
method.Statements.Add(paramsDef);
}
foreach (DomainOperationParameter paramInfo in operationParameters)
{
// If this is an enum type, we need to ensure it is either shared or
// can be generated. Failure to use this enum logs an error and exits.
// The test for legality also causes the enum to be generated if required.
Type enumType = TypeUtility.GetNonNullableType(paramInfo.ParameterType);
if (enumType.IsEnum)
{
string errorMessage = null;
if (!this.ClientProxyGenerator.CanExposeEnumType(enumType, out errorMessage))
{
this.ClientProxyGenerator.LogError(string.Format(CultureInfo.CurrentCulture,
Resource.ClientCodeGen_Domain_Op_Enum_Error,
method.Name,
this._proxyClass.Name,
enumType.FullName,
errorMessage));
return;
}
else
{
// Register use of this enum type, which could cause deferred generation
this.ClientProxyGenerator.RegisterUseOfEnumType(enumType);
}
}
// add the parameter to the method
CodeParameterDeclarationExpression paramDecl = new CodeParameterDeclarationExpression(
CodeGenUtilities.GetTypeReference(
CodeGenUtilities.TranslateType(paramInfo.ParameterType),
this.ClientProxyGenerator,
this._proxyClass),
paramInfo.Name);
// Propagate parameter level validation attributes from domain operation entry
IEnumerable <Attribute> paramAttributes = paramInfo.Attributes.Cast <Attribute>();
string commentHeader =
string.Format(
CultureInfo.CurrentCulture,
Resource.ClientCodeGen_Attribute_Parameter_FailedToGenerate,
paramInfo.Name);
CustomAttributeGenerator.GenerateCustomAttributes(
this.ClientProxyGenerator,
this._proxyClass,
ex => string.Format(CultureInfo.CurrentCulture, Resource.ClientCodeGen_Attribute_ThrewException_CodeMethodParameter, ex.Message, paramDecl.Name, method.Name, this._proxyClass.Name, ex.InnerException.Message),
paramAttributes,
paramDecl.CustomAttributes,
method.Comments,
commentHeader);
method.Parameters.Add(paramDecl);
// add the parameter and value to the params dictionary
method.Statements.Add(new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(paramsRef, "Add"),
new CodePrimitiveExpression(paramInfo.Name),
new CodeVariableReferenceExpression(paramInfo.Name)));
}
// add parameters if present
if (operationParameters.Count > 0)
{
invokeParams.Add(paramsRef);
}
else
{
invokeParams.Add(new CodePrimitiveExpression(null));
}
InvokeAttribute invokeAttribute = (InvokeAttribute)domainOperationEntry.OperationAttribute;
invokeParams.Add(new CodePrimitiveExpression(invokeAttribute.HasSideEffects));
switch (invokeKind)
{
case InvokeKind.WithCallback:
{
CodeTypeReference callbackType = CodeGenUtilities.GetTypeReference(typeof(Action).FullName, (string)this._proxyClass.UserData["Namespace"], false);
callbackType.TypeArguments.Add(invokeOperationType);
// add callback method parameter
method.Parameters.Add(new CodeParameterDeclarationExpression(callbackType, "callback"));
invokeParams.Add(new CodeVariableReferenceExpression("callback"));
// add the userState parameter to the end
method.Parameters.Add(new CodeParameterDeclarationExpression(CodeGenUtilities.GetTypeReference(typeof(object), this.ClientProxyGenerator, this._proxyClass), "userState"));
invokeParams.Add(new CodeVariableReferenceExpression("userState"));
}
break;
case InvokeKind.WithoutCallback:
invokeParams.Add(new CodePrimitiveExpression(null));
invokeParams.Add(new CodePrimitiveExpression(null));
break;
case InvokeKind.Async:
var cancellationTokenType = CodeGenUtilities.GetTypeReference(typeof(CancellationToken), this.ClientProxyGenerator, this._proxyClass);
var cancellationTokenParmeter = new CodeParameterDeclarationExpression(cancellationTokenType, "cancellationToken");
// For C# add " = default(CancellationToken)"
// For VB add "Optional" ByVal .... = Nothing
// otherwise fall back to adding [Optional] attribute, this is the same as adding "= default(CancellationToken)"
if (ClientProxyGenerator.IsCSharp)
{
cancellationTokenParmeter.Name = string.Format("{0} = default({1})", cancellationTokenParmeter.Name, cancellationTokenType.BaseType);
}
else if (ClientProxyGenerator.IsVB) // VB
{
// Set an invalid field direction in order to have VB Code gen from generating
cancellationTokenParmeter.Direction = (FieldDirection)0xff;
cancellationTokenParmeter.Name = "Optional ByVal " + cancellationTokenParmeter.Name;
cancellationTokenParmeter.Type = new CodeTypeReference(cancellationTokenType.BaseType + " = Nothing");
}
else
{
// Add [Optional] attribute
cancellationTokenParmeter.CustomAttributes.Add(new CodeAttributeDeclaration(
CodeGenUtilities.GetTypeReference(typeof(OptionalAttribute), this.ClientProxyGenerator, this._proxyClass)));
}
method.Parameters.Add(cancellationTokenParmeter);
invokeParams.Add(new CodeVariableReferenceExpression("cancellationToken"));
break;
}
// this.ValidateMethod("methodName", parameters);
CodeExpression paramsExpr = new CodePrimitiveExpression(null);
if (operationParameters.Count > 0)
{
paramsExpr = paramsRef;
}
CodeExpressionStatement validateMethodCall = new CodeExpressionStatement(
new CodeMethodInvokeExpression(
new CodeThisReferenceExpression(),
"ValidateMethod",
new CodeExpression[]
{
new CodePrimitiveExpression(methodName),
paramsExpr
}));
method.Statements.Add(validateMethodCall);
var invokeMethod = (invokeKind == InvokeKind.Async) ? "InvokeOperationAsync" : "InvokeOperation";
var typeParameters = (domainOperationEntry.ReturnType == typeof(void)) ? Array.Empty <CodeTypeReference>() : new[] { operationReturnType };
var invokeMethodReference = new CodeMethodReferenceExpression(new CodeThisReferenceExpression(), invokeMethod, typeParameters);
CodeExpression invokeCall = new CodeMethodInvokeExpression(invokeMethodReference, invokeParams.ToArray());
method.Statements.Add(new CodeMethodReturnStatement(invokeCall));
}