/* ****************************************************************************************************** *
* --------------------------- HELPING METHODS ------------------------------ *
* ****************************************************************************************************** */
private FunctionInformation BasicAggregateImplementation(MethodCallExpression methodExpression, string functionName, FunctionInformation.FunctionType functionType)
{
int argumentCount = methodExpression.Arguments.Count;
FunctionInformation information = new FunctionInformation()
{
Name = functionName,
Type = functionType,
MeaningfulArguments = new object[1]
};
System.Type argumentType = methodExpression.Arguments[0].Type.GenericTypeArguments[0];
string entityFullName = argumentType.IsInterface ? default(string) : argumentType.FullName;
string fqn = new FullyQualifiedNameVisitor().BringFQN(methodExpression);
fqn = fqn ?? entityFullName + (argumentCount > 1 ? GetSelectorBody(methodExpression.Arguments[1]) : "");
information.MeaningfulArguments[0] = fqn;
information.WhereContribution = argumentCount > 1 ? OQLBuilder.BuildWhereClause(currentContext, methodExpression.Arguments[1], out OQLBuilder oqlBuilder).Trim() : default(string);
Logger.Log(
"Function Information: " + information.ToLog(),
Microsoft.Extensions.Logging.LogLevel.Debug
);
return(information);
}
internal static string BuildWhereClause(DbContext context, Expression node, out OQLBuilder builder)
{
builder = new OQLBuilder(context);
builder.Visit(node);
return(builder.whereBuilder.ToString());
}
internal static string ExpressionToOQL(DbContext context, Expression node, out OQLBuilder oqlBuilder)
{
Debug.Assert(node != null);
ValidationResult result = new OQLQueryAnalyzer(node).ValidateQuery();
if (!result.IsValid)
{
throw new Exception(result.Reason);
}
oqlBuilder = new OQLBuilder(context);
oqlBuilder.Visit(node);
return(oqlBuilder.BuildQuery());
}