Choose Construct

If you want to do successive checks like "if-else" or "if-else if – else if", then you can use the Choose construct.

The format is:

<choose>
  <when>
    ...
  </when>
  <when>
    ...
  </when>
  <otherwise>
    ...
  </otherwise>
</choose>

If first <when> condition matches, then the instructions within that section are executed. Else, the second <when> condition is attempted. If none of the when condition matches, then the instructions within the <otherwise> section are executed. The <otherwise> section is optional.

The following concrete example shows a full choose statement.

<choose>
  <when test="$_severity IN '6, 7'">
    <setEventAttribute attr="eventSeverity">1</setEventAttribute>
  </when>

  <when test="$_severity = '1'">
    <setEventAttribute attr="eventSeverity">10</setEventAttribute>
  </when>

  <when test="$_severity = '2'">
    <setEventAttribute attr="eventSeverity">8</setEventAttribute>
  </when>

  <when test="$_severity IN '3, 4'">
    <setEventAttribute attr="eventSeverity">5</setEventAttribute>
  </when>

  <when test="$_severity = '5'">
    <setEventAttribute attr="eventSeverity">2</setEventAttribute>
  </when>
    <otherwise>
      <setEventAttribute attr="eventSeverity">1</setEventAttribute>
    </otherwise>
</choose>

Results of execution:

• If severity is 2 then eventSeverity is 8.

• If severity is 11 then eventSeverity is 1.