Case Distinctions for Variables

The statement tt:switch-var allows case distinctions in which, unlike tt:switch, you can only specify cases for data content, not for data flow:

Syntax Syntax

```
<tt:switch-var> 
```
```
  case1
```
```
  case2
```
```
 </tt:switch-var>
```

End of the code.

In tt:switch, you can specify a list of cases case1, case2, ... Syntactically, every case case1, case2, ... is formulated by a condition for variables – that is, a subelement tt:cond-var. Other direct subelements are not possible in tt:switch-var.

You can specify no more than one case that does not contain a check condition.

Serialization and Deserialization

Serialization and deserialization follow these rules:

The first case tt:cond-var, whose explicitly specified condition is met, is processed and the element tt:switch-var is left.
If no condition is met for any case with explicitly specified conditions, the case without condition is executed by default (if it exists) and the element tt:switch-var is left.
If no case without condition exists, the element tt:switch-var is left without any case being processed.

Note Note

Unlike the general case distinction with tt:switch, the content of the cases is irrelevant.

End of the note.

Example

The following transformation extends the example from Conditions for Variables.

Syntax Syntax

<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:switch-var>
```
```
      <tt:cond-var check="PARA<50">
```
```
        <X val="small">...</X>
```
```
      </tt:cond-var>
```
```
      <tt:cond-var check="PARA<100">
```
```
        <X val="medium">...</X>
```
```
      </tt:cond-var>
```
```
      <tt:cond-var>
```
```
        <X val="big">...</X>
```
```
      </tt:cond-var>
```
```
    </tt:switch-var>
```
```
  </tt:template>
```
```
</tt:transform>
```

End of the code.

Depending on the value of the ABAP data object bound to ROOT, the serialization generates either of the following:

The position of the element tt:cond-var without explicit condition within tt:switch-var is irrelevant. However, the order of the elements tt:cond-var with explicit conditions is relevant.