OCLOperators casetruefalse
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This is a new compact form to write: | This is a new compact form to write: | ||
if somebool then | if somebool then | ||
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somebool.casetruefalse(someexpressionwithtypeX,someOtherexpressionwithtypeX) | somebool.casetruefalse(someexpressionwithtypeX,someOtherexpressionwithtypeX) | ||
==== Usage in EAL ==== | |||
If you want to execute methods in a case/switch-like statement. | If you want to execute methods in a case/switch-like statement. | ||
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) | ) | ||
==== Usage in OCL ==== | |||
If you want to derive a string based on a list of conditions and have an else-statement if none of the expressions were True: | If you want to derive a string based on a list of conditions and have an else-statement if none of the expressions were True: | ||
(self.oclIsInState(#New).caseTrueFalse('New/Ordering', String.nullValue)+ | (self.oclIsInState(#New).caseTrueFalse('New/Ordering', String.nullValue)+ | ||
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The collect construct at the end can when the result, and if null, do the "else" statement. '''Note'''! Parenthesis around the string concatenation. | The collect construct at the end can when the result, and if null, do the "else" statement. '''Note'''! Parenthesis around the string concatenation. | ||
See also [[OCLOperators_whentrue]] | '''See also:''' [[Documentation:OCLOperators whentrue|OCLOperators_whentrue]] | ||
[[Category:OCLOperators]] | [[Category:OCLOperators]] | ||
{{Edited|July|12| | {{Edited|July|12|2025}} | ||
Latest revision as of 05:20, 13 February 2025
This page was created by Hans.karlsen@mdriven.net on 2021-12-03. Last edited by Stephanie@mdriven.net on 2025-02-13.
This is a new compact form to write:
if somebool then someexpressionwithtypeX else someOtherexpressionwithtypeX endif
This operator enables you to write the same thing as:
somebool.casetruefalse(someexpressionwithtypeX,someOtherexpressionwithtypeX)
Usage in EAL
If you want to execute methods in a case/switch-like statement.
This makes a switch-like construct look like this:
let x=SomeObject.SomeEnum in ( (x=#Enum1).casetruefalse(SomeObject.DoYourThing1,DoNothing); (x=#Enum2).casetruefalse(SomeObject.DoYourThing2,DoNothing); (x=#Enum3).casetruefalse(SomeObject.DoYourThing3,DoNothing) )
Usage in OCL
If you want to derive a string based on a list of conditions and have an else-statement if none of the expressions were True:
(self.oclIsInState(#New).caseTrueFalse('New/Ordering', String.nullValue)+
self.oclIsInState(#Waiting).caseTrueFalse('Waiting', String.nullValue)+
self.oclIsInState(#Ordered).caseTrueFalse('Ordered', String.nullValue))->
collect(s| s.notNull.caseTrueFalse(s, self.State))->first
The collect construct at the end can when the result, and if null, do the "else" statement. Note! Parenthesis around the string concatenation.
See also: OCLOperators_whentrue