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"
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COPYRIGHT (c) 2009 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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2786
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"{ Package: 'stx:libview2' }"
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2785
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ValueHolder subclass:#TypedValueHolder
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instanceVariableNames:'types'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-Support-Models'
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!
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!TypedValueHolder class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2009 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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documentation
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"
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this is simply a valueHolder which checks new values against a given type.
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Useful to debug/trap invalid setters (such as those storing a true into a numeric holder)
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[author:]
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Claus Gittinger
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"
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!
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examples
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[exBegin]
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|v|
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v := (TypedValueHolder with:1) type:Number.
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(Delay forSeconds:3) wait.
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v value:nil.
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[exEnd]
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[exBegin]
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|v|
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v := (TypedValueHolder with:1) types:{UndefinedObject. Number}.
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(Delay forSeconds:3) wait.
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v value:nil.
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(Delay forSeconds:3) wait.
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v value:'huh'.
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[exEnd]
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"
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! !
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!TypedValueHolder methodsFor:'accessing'!
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type:aClass
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self types:(Array with:aClass)
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!
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types:aCollectionOfTypes
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types := aCollectionOfTypes.
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!
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value:newValue
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types notNil ifTrue:[
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(types contains:[:type | newValue isKindOf:type]) ifFalse:[
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self error:'Unvalid value stored in typed valueHolder' mayProceed:true
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]
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].
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^ super value:newValue.
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! !
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!TypedValueHolder class methodsFor:'documentation'!
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version_CVS
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^ '$Header: /cvs/stx/stx/libview2/TypedValueHolder.st,v 1.2 2009-11-06 19:24:27 cg Exp $'
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2785
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! !
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