public override IEnumerable <CodeStatement> GetInitializationStatements(AggregateFunctionContext context)
{
MemberMappingDescriptor member = context.Member;
Type resultType;
Type instanceType;
bool isSimpleMapping = false;
if (member.IsArray || member.IsList)
{
instanceType = member.IsArray ?
member.AggregateMappingDescription.TargetType.GetElementType() :
member.AggregateMappingDescription.TargetType.GetGenericArguments()[0];
resultType = typeof(List <>).MakeGenericType(instanceType);
if (!instanceType.IsPrimitive && instanceType != typeof(string))
{
m_expression = string.Format("{{0}}.Add({0}.AssembleFrom({{1}}));", GetAssemblerName(context));
}
else
{
m_expression = "{0}.Add({1});";
isSimpleMapping = true;
}
}
else
{
string msg = ErrorBuilder.CantAggregateOverNoncollectionError(member, "collect");
throw new OtisException(msg); //todo: test
}
m_isArray = member.IsArray;
List <CodeStatement> statements = new List <CodeStatement>();
CodeExpression[] parameters = new CodeExpression[0];
CodeStatement st = new CodeVariableDeclarationStatement(resultType,
context.FunctionObjectName,
new CodeObjectCreateExpression(resultType, parameters));
statements.Add(st);
if (!isSimpleMapping)
{
st = new CodeVariableDeclarationStatement(
string.Format("IAssembler<{0}, {1}>", TypeHelper.GetTypeDefinition(instanceType), TypeHelper.GetTypeDefinition(context.SourceItemType)),
GetAssemblerName(context),
new CodeSnippetExpression("this"));
statements.Add(st);
}
return(statements);
}
