while, break

Syntax

[#while condition]
    body
[/#while]

where:

• condition: an MQL expression that evaluates to a boolean value.
• body: any set of text template statements.

Description

The while directive processes the code between the start-tag and end-tag while the condition evaluates to true.

You may leave the while loop using the break directive.

Examples

This code prints the name of an element and of its owners:

Hierarchy:
[#set element : uml21.Element = ...]
[#while element != null]
    ${element.name}
    [#set element = element.owner]
[/#while]

The above code would produce an output similar to the following:

Hierarchy:
    Account
    AccountPackage
    Model

We could decide to break the loop when we encouter the name 'AccountPackage':

Hierarchy:
[#set element : uml21.Element = ...]
[#while element != null]
    [#if element.name == "AccountPackage"]
        [#break]
    [/#if]
    ${element.name}
    [#set element = element.owner]
[/#while]

Which would result to an output similar to the following:

Hierarchy:
    Account
    AccountPackage