[gme-users] Ordering in GME Enumeration Values?

[Zoltan Molnar]

... and in OCL this doesn't work, because < operator is not defined for enumerations.


Related topic:
http://list.isis.vanderbilt.edu/pipermail/gme-users/2006-August/001340.html 

Zoli


-----Original Message-----
From:	gme-users-bounces at list.isis.vanderbilt.edu on behalf of Zoltan Molnar
Sent:	Fri 10/27/2006 10:44 AM
To:	gme-users
Cc:	
Subject:	RE: [gme-users] Ordering in GME Enumeration Values?

If you don't specify explicit values for enum items then each distinct item's value becomes the item itself.
For example,
1
2
3
defined in the meta as an enumeration, might look like in the xmp file:
<enumitem dispname = "1" value = "1"></enumitem>
<enumitem dispname = "2" value = "2"></enumitem>
<enumitem dispname = "3" value = "3"></enumitem>

Another definition (explicit value assignment):
One, 1
Two, 2
Three, 3 
results in the following xmp:
<enumitem dispname = "One" value = "1"></enumitem>
<enumitem dispname = "Two" value = "2"></enumitem>
<enumitem dispname = "Three" value = "3"></enumitem> 

Values are comparable in such cases, because from Bon2 you can ask 
myAttr->getIntegerValue().

They are not comparable, in case of the 
One
Two
Three 
definition, where values will be "One", "Two", ..., so you must use 
myAttr->getStringValue() in such cases.

So the C++ comparison trick is possible only in certain cases, when integer-convertible values are found in the enum.

Zoli


-----Original Message-----
From:	gme-users-bounces at list.isis.vanderbilt.edu on behalf of Joe H.
Sent:	Fri 10/27/2006 7:44 AM
To:	gme-users
Cc:	
Subject:	[gme-users] Ordering in GME Enumeration Values?

Hello.

 

I have a question concerning enumeration values modeled in GME. Do the
values take on ascending order like they do in C/C++? For example, if I
specify an enumeration in GME with values of yellow, red, and then blue can
I do a comparison to see if an enumeration value is less than blue? This
would be very helpful for me in defining my OCL constraints but I wasn't
sure if GME supports this.

 

Thanks.

 

-Joe




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