private DbExpression RootTranslate(TranslationContext context, Expression exp)
{
switch (exp.NodeType)
{
case ExpressionType.Call:
var call = (MethodCallExpression)exp;
var method = call.Method;
if (method.IsGenericMethod)
{
method = method.GetGenericMethodDefinition();
}
if (UnitTypeMethods.ContainsKey(method))
{
return(UnitTypeTranslate(context, exp));
}
else if (UnitItemTypeMethods.ContainsKey(method))
{
return(UnitItemTypeMethods[method](context, call, method));
}
else if (ValueTypeMethods.ContainsKey(method))
{
return(ValueTypeMethods[method](context, call, method));
}
break;
case ExpressionType.Constant:
return(UnitTypeTranslate(context, exp));
default:
return(ExpressionTranslate(context, exp));
}
throw new TranslateException(exp, Res.NotSupportedParseExpression);
}
private DbExpression ValueTypeTranslate(TranslationContext context, Expression exp)
{
switch (exp.NodeType)
{
case ExpressionType.Call:
var call = (MethodCallExpression)exp;
var method = call.Method;
if (method.IsGenericMethod)
{
method = method.GetGenericMethodDefinition();
}
if (ValueTypeMethods.TryGetValue(method, out ValueTypeTranslateMethodType action))
{
return(action(context, call, method));
}
if (method.IsDefined(typeof(DbFunctionAttribute)))
{
return(ScalarCustomFunctionTranslate(context, call, method));
}
if (RecursiveConstantTranslate(context, exp, out DbExpression result))
{
return(result);
}
break;
}
throw new TranslateException(exp, Res.NotSupportedExpressionParseValueType);
}