private void CreateServiceType()
{
// We can create the service type(s) only if we have one or more service
// contract.
if (code.ServiceContracts.Count > 0)
{
// Take a reference to the first ServiceContract available.
// IMPORTANT!:(Currently we only support single service type)
// May be want to support multiple service contracts in the next version.
CodeTypeExtension srvContract = code.ServiceContracts[0];
// Notify if srvContract is null. This would mean that we have constructed a bad
// GeneratedCode instance from our CodeFactory.
Debug.Assert(srvContract != null, "Generated service contract could not be null.");
// Construct the service type name by removing the leading "I" character from
// the service contract name that was added for generation of the interface.
string srvTypeName = srvContract.ExtendedObject.Name.Substring(1);
// Create a new instance of CodeTypeDeclaration type representing the service type.
CodeTypeDeclaration srvType = new CodeTypeDeclaration(srvTypeName);
// Also wrap the CodeTypeDeclaration in an extension.
CodeTypeExtension typeExt = new CodeTypeExtension(srvType);
// This class.
srvType.IsClass = true;
switch (options.MethodImplementation)
{
case MethodImplementation.PartialClassMethodCalls:
// The service type is partial so that the implementation methods can be written in separate file.
srvType.IsPartial = true;
break;
case MethodImplementation.AbstractMethods:
// The service type is abstract so that the operation methods can be made abstract.
srvType.TypeAttributes |= TypeAttributes.Abstract;
break;
}
// And this implements the service contract interface.
if (code.CodeLanguauge == CodeLanguage.VisualBasic)
{
srvType.Members.Add(new CodeSnippetTypeMember("Implements " + srvContract.ExtendedObject.Name));
}
else
{
srvType.BaseTypes.Add(new CodeTypeReference(srvContract.ExtendedObject.Name));
}
// Now itterate the srvContractObject.Members and add each and every method in
// the service contract type to the new type being created.
foreach (CodeTypeMemberExtension methodExtension in srvContract.Methods)
{
// Get a referece to the actual CodeMemberMethod object extended
// by ext.
CodeMemberMethod method = methodExtension.ExtendedObject as CodeMemberMethod;
// Create a new CodeMemeberMethod and copy the attributes.
CodeMemberMethod newMethod = new CodeMemberMethod();
newMethod.Name = method.Name;
// Implemented method has to be public.
newMethod.Attributes = MemberAttributes.Public;
// Notify that this member is implementing a method in the service contract.
if (code.CodeLanguauge == CodeLanguage.VisualBasic)
{
newMethod.ImplementationTypes.Add(new CodeTypeReference(srvContract.ExtendedObject.Name));
}
else
{
newMethod.ImplementationTypes.Add(srvType.BaseTypes[0]);
}
// Add all parametes to the newly created method.
foreach (CodeParameterDeclarationExpression cpde in method.Parameters)
{
newMethod.Parameters.Add(cpde);
}
// Set the return type.
newMethod.ReturnType = method.ReturnType;
switch (options.MethodImplementation)
{
case MethodImplementation.PartialClassMethodCalls:
{
// Gather the parameters from the operation to pass into the implementation method.
IEnumerable<CodeArgumentReferenceExpression> parameters = newMethod.Parameters
.OfType<CodeParameterDeclarationExpression>()
.Select(p => new CodeArgumentReferenceExpression(p.Name));
// Create an expression to invoke the implementation method.
CodeMethodInvokeExpression methodInvocation = new CodeMethodInvokeExpression(null, newMethod.Name + "Implementation", parameters.ToArray());
// Check if the method has a return type.
if (newMethod.ReturnType.BaseType != "System.Void")
{
// Make sure the call to the implementation method is returned.
CodeMethodReturnStatement returnStatement = new CodeMethodReturnStatement(methodInvocation);
newMethod.Statements.Add(returnStatement);
}
else
{
// Add the call to the implementation method without a return.
newMethod.Statements.Add(methodInvocation);
}
}
break;
case MethodImplementation.NotImplementedException:
{
// Create a new code statement to throw NotImplementedExcption.
CodeThrowExceptionStatement niex = new CodeThrowExceptionStatement(
new CodeObjectCreateExpression(
new CodeTypeReference(typeof(NotImplementedException)), new CodeExpression[] { })
);
// Add it to the statements collection in the new method.
newMethod.Statements.Add(niex);
}
break;
case MethodImplementation.AbstractMethods:
{
// No statement is required for the abstract methods.
newMethod.Attributes |= MemberAttributes.Abstract;
break;
}
}
// Wrap the CodeMemberMethod in an extension. This could be useful for other extensions.
CodeTypeMemberExtension newMethodExt = new CodeTypeMemberExtension(newMethod, typeExt);
srvType.Members.Add(newMethodExt);
}
// Add the ServiceBehaviorAttribute attribute.
CodeAttributeDeclaration serviceBehaviorAttribute = new CodeAttributeDeclaration(
new CodeTypeReference(typeof(ServiceBehaviorAttribute)));
if (!string.IsNullOrEmpty(options.InstanceContextMode))
{
CodeTypeReferenceExpression instanceContextModeEnum = new CodeTypeReferenceExpression(typeof(InstanceContextMode));
CodeFieldReferenceExpression instanceContextModeValue = new CodeFieldReferenceExpression(instanceContextModeEnum, options.InstanceContextMode);
CodeAttributeArgument instanceContextModeArgument = new CodeAttributeArgument("InstanceContextMode", instanceContextModeValue);
serviceBehaviorAttribute.Arguments.Add(instanceContextModeArgument);
}
if (!string.IsNullOrEmpty(options.ConcurrencyMode))
{
CodeTypeReferenceExpression concurrencyModeEnum = new CodeTypeReferenceExpression(typeof(ConcurrencyMode));
CodeFieldReferenceExpression concurrencyModeValue = new CodeFieldReferenceExpression(concurrencyModeEnum, options.ConcurrencyMode);
CodeAttributeArgument concurrencyModeArgument = new CodeAttributeArgument("ConcurrencyMode", concurrencyModeValue);
serviceBehaviorAttribute.Arguments.Add(concurrencyModeArgument);
}
if (!options.UseSynchronizationContext)
{
CodeAttributeArgument useSynchronizationContextAttribute = new CodeAttributeArgument("UseSynchronizationContext", new CodePrimitiveExpression(false));
serviceBehaviorAttribute.Arguments.Add(useSynchronizationContextAttribute);
}
typeExt.AddAttribute(serviceBehaviorAttribute);
this.serviceTypeName = srvType.Name;
// Finally add the newly created type to the code being generated.
code.ServiceTypes.Add(typeExt);
}
}
