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Diya-API/Diya/DiyaSingleton.class.st

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Class {
#name : #DiyaSingleton,
#superclass : #DiyaBaseObject,
#classVars : [
'singletons'
],
#category : #'Diya-Core'
}
{ #category : #'instance creation' }
DiyaSingleton class >> cleanUpInstance: singleton [
"do nothing for now"
]
{ #category : #'class initialization' }
DiyaSingleton class >> initialize [
singletons := Dictionary new.
]
{ #category : #'instance creation' }
DiyaSingleton class >> new [
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^ DiyaCoreAPIError signal: 'Use #uniqueInstance'
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]
{ #category : #'instance creation' }
DiyaSingleton class >> reset [
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|singleton key|
key := self class asString asSymbol.
singleton := singletons at: key ifAbsent: [ ^ self ].
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self cleanUpInstance: singleton.
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singletons removeKey: key
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]
{ #category : #'instance creation' }
DiyaSingleton class >> resetAll [
self allSubclasses do:[:e| e reset]
]
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{ #category : #'instance creation' }
DiyaSingleton class >> uniqueInstance [
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^singletons at: self class asString asSymbol ifAbsentPut: [ super new ].
]
{ #category : #initialization }
DiyaSingleton >> initialize [
super initialize.
Transcript show: 'Initialise unique instance of ', self className; cr.
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]