MACROMEDIA COLDFUSION MX 61-DEVELOPING COLDFUSION MX, Develop Manual

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Advanced topics 501
<h2>Object Classes</h2>
<table border="1">
<tr>
<th>Name</th>
<th>Superior class</th>
<th>Must have</th>
<th>May have</th>
</tr>
<cfloop index = "thisElement" list =
#Entrylist2.objectclasses#>
<cfscript>
thisElement = Trim(thisElement);
nameloc = Find("NAME",
thisElement);
descloc = Find("DESC",
thisElement);
suploc = Find("SUP", thisElement);
mustloc = Find("MUST",
thisElement);
mayloc = Find("MAY", thisElement);
endloc = Len(thisElement);
</cfscript>
Displays the object class name, superior
class, required attributes, and optional
attributes for each object class in a table.
The schema contains the definitions of all
object classes in a comma delimited list, so
the code uses a list type
cfloop tag.
The thisElement variable contains the object
class definition. Trim off any leading or
trailing spaces, then use the class definition
field keywords in
Find functions to get the
starting locations of the required fields,
including the Object class ID. (The ID is not
displayed.)
Gets the length of the thisElement string for
use in later calculations.
<tr>
<td><cfoutput>#Mid(thisElement,
6, descloc-nameloc-8)
#</cfoutput></td>
<cfif #suploc# NEQ 0>
<td><cfoutput>#Mid(thisElement,
5, mustloc-suploc-7)#
</cfoutput></td>
<cfelse>
<td>NONE</td>
</cfif>
<cfif #mayloc# NEQ 0>
<td><cfoutput>#Replace
(Mid(thisElement, 6,
mayloc-mustloc-9), " $ ", ", ",
"all")#</cfoutput></td>
<td><cfoutput>#Replace
(Mid(thisElement, 5,
endloc-mayloc-8), " $ ", ", ",
"all")#</cfoutput></td>
<cfelse>
<td><cfoutput>#Replace
(Mid(thisElement, 6,
endloc-mustloc-9), " $ ", ", ",
"all")#</cfoutput></td>
<td>NONE</td>
</cfif>
</tr>
</cfloop>
</table>
Displays the field values. Uses the
Mid
function to extract individual field values
from the thisElement string.
The top object class does not have a
superior class entry. Handles this special
case by testing the suploc location variable.
If the value is not 0, handles normally,
otherwise, output "NONE".
There might not be any optional attributes.
Handles this case similarly to the superior
class. The calculation of the location of
required attributes uses the location of the
optional attributes if the field exists;
otherwise, uses the end of the object class
definition string.
Code Description