Conditions for Variables
The statement tt:cond-var enables conditional transformations in which, unlike tt:[s-|d-]cond, you cannot specify conditions for the data flow but only for data contents:
<tt:cond-var
check="cond">
...
</tt:cond-var>
The content of tt:cond-var is processed depending on a condition cond. The same applies to cond as to general conditions, with the exception that you can only specify variables and values as operands, but no data nodes.
Outside of tt:switch-var, you must specify a condition check.
Serialization and Deserialization
During serialization and deserialization, the condition is checked and the content of the element tt:cond-var is only processed if the condition is met.
...
Note
Unlike general conditional transformations with tt:[s-|d-]cond, the content of the XML input stream for tt:cond-var is irrelevant.
Example
The following transformation demonstrates a condition for a parameter:
<tt:transform xmlns:tt="http://www.sap.com/transformation-templates">
<tt:root name="ROOT"/>
<tt:template>
<tt:apply
name="SUB">
<tt:with-parameter name="PARA" ref="ROOT"/>
</tt:apply>
</tt:template>
<tt:template name="SUB">
<tt:context>
<tt:parameter name="PARA"/>
</tt:context>
<tt:cond-var
check="PARA<100">
<X
val="small">...</X>
</tt:cond-var>
<tt:cond-var
check="PARA>=100">
<X
val="big">...</X>
</tt:cond-var>
</tt:template>
</tt:transform>
In tt:apply, the value of the data root ROOT is passed to the parameter PARA of the subtemplate SUB and checked there. Depending on whether the ABAP data object bound to ROOTis smaller, greater than or equal to 100, the serialization generates either of the following:
<X val="small">...</X>
<X val="big">...</X>
In the check conditions, you could also write var(PARA) instead of PARA.