private Expression <Func <TEntity, bool> > BuildTypedLambdaIncludingPrincipals <TEntity>(IClearanceSource clearanceSource, Expression entitySourceExpression = null)
{
Expression body = this.BuildUntypedFilterExpressionIncludingPrincipals(clearanceSource);
if (body == null)
{
body = BinaryExpression.Constant(true);
}
return(Expression.Lambda <Func <TEntity, bool> >(body, _EntityParameter));
}
private Expression BuildAcValueOrExpressionForDimensionClearanceValues(MemberExpression propExpr, Type propertyType, string[] dimensionClearanceValues)
{
if (!dimensionClearanceValues.Any())
{
return(BinaryExpression.Constant(false));
}
Expression grandExpr = null;
Expression denyExpr = null;
foreach (string dimensionClearanceValue in dimensionClearanceValues)
{
string value = dimensionClearanceValue.Trim();
Expression constClearance = this.BuildConstValueExpressionFromString(propertyType, value);
if (value.StartsWith("!"))
{
value = value.Substring(1);
if (value == "*")
{
return(BinaryExpression.Constant(false));
}
if (denyExpr == null)
{
denyExpr = Expression.Equal(propExpr, constClearance);
}
else
{
denyExpr = Expression.OrElse(denyExpr, Expression.Equal(propExpr, constClearance));
}
}
else
{
if (value == "*")
{
return(BinaryExpression.Constant(true));
}
if (grandExpr == null)
{
grandExpr = Expression.Equal(propExpr, constClearance);
}
else
{
grandExpr = Expression.OrElse(grandExpr, Expression.Equal(propExpr, constClearance));
}
}
}
if (denyExpr == null)
{
if (grandExpr == null)
{
return(BinaryExpression.Constant(false));
}
else
{
return(grandExpr);
}
}
else
{
Expression notDeniedExpr = Expression.Not(denyExpr);
if (grandExpr == null)
{
return(notDeniedExpr);
}
else
{
return(Expression.AndAlso(grandExpr, notDeniedExpr));
}
}
}