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"
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COPYRIGHT (c) 1989-93 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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Object subclass:#Association
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instanceVariableNames:'key value'
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classVariableNames:''
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poolDictionaries:''
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category:'Collections-Support'
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!
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Association comment:'
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COPYRIGHT (c) 1989-93 by Claus Gittinger
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All Rights Reserved
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Associations are a key-value pair; they are the elements of Dictionaries -
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storing value under the key. By itself, an Association is not very
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useful.
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Instance variables:
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key <Object> the key
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value <Object> the value
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%W% %E%
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'!
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!Association class methodsFor:'instance creation'!
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key:aKey
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"return a new Association."
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^ self basicNew key:aKey
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!
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key:aKey value:aValue
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"return a new Association"
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^ self basicNew key:aKey value:aValue
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! !
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!Association methodsFor:'accessing'!
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key
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"return the key of the association"
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^ key
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!
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key:anObject
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"set the key of the receiver to be anObject.
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Return the receiver"
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key := anObject
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!
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value
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"return the value of the association"
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^ value
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!
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value:anObject
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"set the value of the receiver to be anObject.
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Return the receiver"
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value := anObject
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!
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key:aKey value:aValue
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"set both the key and value of the receiver.
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Return the receiver"
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key := aKey.
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value := aValue
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! !
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!Association methodsFor:'comparing'!
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= anAssociation
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(anAssociation isKindOf:Association) ifTrue:[
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(anAssociation key = key) ifTrue:[
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^ anAssociation value = value
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]
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].
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^ false
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! !
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!Association methodsFor:'printing & storing'!
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printString
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"return a string containing a printable representation
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of the receiver"
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^ key printString , '->' , value printString
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!
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displayString
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"return a string containing a printable representation
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of the receiver for displaying"
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^ key displayString , '->' , value displayString
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! !
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