OCLOperators casetruefalse
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This is a new compact form to write : | <message>Write the content here to display this box</message> | ||
This is a new compact form to write: | |||
if somebool then | if somebool then | ||
someexpressionwithtypeX | someexpressionwithtypeX | ||
| Line 5: | Line 6: | ||
someOtherexpressionwithtypeX | someOtherexpressionwithtypeX | ||
endif | endif | ||
This operator enables you to write the same thing as | This operator enables you to write the same thing as: | ||
somebool. | somebool.casetruefalse(someexpressionwithtypeX,someOtherexpressionwithtypeX) | ||
This makes a switch like construct look like this: | |||
==== 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 | let x=SomeObject.SomeEnum in | ||
( | ( | ||
(x=#Enum1). | (x=#Enum1).casetruefalse(SomeObject.DoYourThing1,DoNothing); | ||
(x=#Enum2). | (x=#Enum2).casetruefalse(SomeObject.DoYourThing2,DoNothing); | ||
(x=#Enum3). | (x=#Enum3).casetruefalse(SomeObject.DoYourThing3,DoNothing) | ||
) | ) | ||
See also [[ | |||
==== 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:''' [[Documentation:OCLOperators whentrue|OCLOperators_whentrue]] | |||
[[Category:OCLOperators]] | |||
{{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