internal override RuleExpressionResult Evaluate(CodeExpression expression, RuleExecution execution)
{
CodeCastExpression expression2 = (CodeCastExpression)expression;
object operandValue = RuleExpressionWalker.Evaluate(execution, expression2.Expression).Value;
RuleExpressionInfo info = execution.Validation.ExpressionInfo(expression2);
if (info == null)
{
InvalidOperationException exception = new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Messages.ExpressionNotValidated, new object[0]));
exception.Data["ErrorObject"] = expression2;
throw exception;
}
Type expressionType = info.ExpressionType;
if (operandValue == null)
{
if (ConditionHelper.IsNonNullableValueType(expressionType))
{
RuleEvaluationException exception2 = new RuleEvaluationException(string.Format(CultureInfo.CurrentCulture, Messages.CastIncompatibleTypes, new object[] { Messages.NullValue, RuleDecompiler.DecompileType(expressionType) }));
exception2.Data["ErrorObject"] = expression2;
throw exception2;
}
}
else
{
operandValue = Executor.AdjustTypeWithCast(execution.Validation.ExpressionInfo(expression2.Expression).ExpressionType, operandValue, expressionType);
}
return(new RuleLiteralResult(operandValue));
}
internal override RuleExpressionInfo Validate(CodeExpression expression, RuleValidation validation, bool isWritten)
{
CodeCastExpression expression2 = (CodeCastExpression)expression;
if (isWritten)
{
ValidationError item = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.CannotWriteToExpression, new object[] { typeof(CodeCastExpression).ToString() }), 0x17a);
item.UserData["ErrorObject"] = expression2;
validation.Errors.Add(item);
return(null);
}
if (expression2.Expression == null)
{
ValidationError error2 = new ValidationError(Messages.NullCastExpr, 0x53d);
error2.UserData["ErrorObject"] = expression2;
validation.Errors.Add(error2);
return(null);
}
if (expression2.Expression is CodeTypeReferenceExpression)
{
ValidationError error = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.CodeExpressionNotHandled, new object[] { expression2.Expression.GetType().FullName }), 0x548);
error.UserData["ErrorObject"] = expression2.Expression;
validation.AddError(error);
return(null);
}
if (expression2.TargetType == null)
{
ValidationError error4 = new ValidationError(Messages.NullCastType, 0x53d);
error4.UserData["ErrorObject"] = expression2;
validation.Errors.Add(error4);
return(null);
}
RuleExpressionInfo info = RuleExpressionWalker.Validate(validation, expression2.Expression, false);
if (info == null)
{
return(null);
}
Type expressionType = info.ExpressionType;
Type type = validation.ResolveType(expression2.TargetType);
if (type == null)
{
return(null);
}
if (expressionType == typeof(NullLiteral))
{
if (ConditionHelper.IsNonNullableValueType(type))
{
ValidationError error5 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.CastOfNullInvalid, new object[] { RuleDecompiler.DecompileType(type) }), 0x53d);
error5.UserData["ErrorObject"] = expression2;
validation.Errors.Add(error5);
return(null);
}
}
else
{
Type type3 = expressionType;
if (ConditionHelper.IsNullableValueType(type3))
{
type3 = type3.GetGenericArguments()[0];
}
Type type4 = type;
if (ConditionHelper.IsNullableValueType(type4))
{
type4 = type4.GetGenericArguments()[0];
}
bool flag = false;
if (type3.IsValueType && type4.IsValueType)
{
if (type3.IsEnum)
{
flag = type4.IsEnum || IsNumeric(type4);
}
else if (type4.IsEnum)
{
flag = IsNumeric(type3);
}
else if (type3 == typeof(char))
{
flag = IsNumeric(type4);
}
else if (type4 == typeof(char))
{
flag = IsNumeric(type3);
}
else if (type3.IsPrimitive && type4.IsPrimitive)
{
try
{
Convert.ChangeType(Activator.CreateInstance(type3), type4, CultureInfo.CurrentCulture);
flag = true;
}
catch (Exception)
{
flag = false;
}
}
}
if (!flag)
{
ValidationError error6;
flag = RuleValidation.ExplicitConversionSpecified(expressionType, type, out error6);
if (error6 != null)
{
error6.UserData["ErrorObject"] = expression2;
validation.Errors.Add(error6);
return(null);
}
}
if (!flag)
{
ValidationError error7 = new ValidationError(string.Format(CultureInfo.CurrentCulture, Messages.CastIncompatibleTypes, new object[] { RuleDecompiler.DecompileType(expressionType), RuleDecompiler.DecompileType(type) }), 0x53d);
error7.UserData["ErrorObject"] = expression2;
validation.Errors.Add(error7);
return(null);
}
}
return(new RuleExpressionInfo(type));
}
