class: TypeConverter
added: #symbolOrNumberOrNil
changed:
#numberWithOptionalScale
#possiblePrintConverterTypes
"
COPYRIGHT (c) 2009 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libview2' }"
ValueHolder subclass:#TypedValueHolder
instanceVariableNames:'types'
classVariableNames:''
poolDictionaries:''
category:'Interface-Support-Models'
!
!TypedValueHolder class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2009 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
documentation
"
this is simply a valueHolder which checks new values against a given type.
Useful to debug/trap invalid setters (such as those storing a true into a numeric holder)
[author:]
Claus Gittinger
"
!
examples
"
[exBegin]
|v|
v := (TypedValueHolder with:1) type:Number.
(Delay forSeconds:3) wait.
v value:nil.
[exEnd]
[exBegin]
|v|
v := (TypedValueHolder with:1) types:{UndefinedObject. Number}.
(Delay forSeconds:3) wait.
v value:nil.
(Delay forSeconds:3) wait.
v value:'huh'.
[exEnd]
"
! !
!TypedValueHolder methodsFor:'accessing'!
type:aClass
self types:(Array with:aClass)
!
types:aCollectionOfTypes
types := aCollectionOfTypes.
!
value:newValue
types notNil ifTrue:[
(types contains:[:type | newValue isKindOf:type]) ifFalse:[
self error:'Unvalid value stored in typed valueHolder' mayProceed:true
]
].
^ super value:newValue.
! !
!TypedValueHolder class methodsFor:'documentation'!
version_CVS
^ '$Header: /cvs/stx/stx/libview2/TypedValueHolder.st,v 1.2 2009-11-06 19:24:27 cg Exp $'
! !