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"
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COPYRIGHT (c) 2002 by eXept Software AG
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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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"{ Package: 'stx:libbasic' }"
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Visitor subclass:#AspectVisitor
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instanceVariableNames:'aspect'
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classVariableNames:''
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poolDictionaries:''
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category:'System-Visiting'
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!
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!AspectVisitor class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2002 by eXept Software AG
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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 a Visitor that visits only some aspects of an object.
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[author:]
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Stefan Vogel (stefan@zwerg)
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[instance variables:]
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aspect <Symbol|Object> something defining the aspect to be visited
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[class variables:]
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[see also:]
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"
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! !
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!AspectVisitor methodsFor:'accessing'!
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aspect
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"return the value of the instance variable 'aspect' (automatically generated)"
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^ aspect
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!
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aspect:something
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"set the value of the instance variable 'aspect' (automatically generated)"
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aspect := something.
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! !
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!AspectVisitor methodsFor:'helpers'!
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aspectElementDescriptorFor:anObject
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"return association that should be visited for all child objects of anObject.
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Return a collection of associations. The association key is the name of the object,
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where the association value is the child object"
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^ anObject elementDescriptorFor:aspect.
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"
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XMLStandardCoder new aspect:#elementDescriptorForInstanceVariables;
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encodingOf:('blaKey' -> 'blaValue')
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XMLStandardCoder new aspect:#elementDescriptorForInstanceVariables;
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encodingOf:('blaKey' -> nil)
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XMLStandardCoder new aspect:#elementDescriptorForNonNilInstanceVariables;
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encodingOf:('blaKey' -> nil)
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XMLStandardCoder new aspect:#blaFaselQuall;
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encodingOf:('blaKey' -> nil)
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"
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!
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visitChildrenOf:anObject
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"visit all child objects of anObject.
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If aspect is defined, perform aspect to fetch the child objects.
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Otherwise encode all the instance variables of anObject.
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Subclasses may send this message"
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|childObjectDescriptors|
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aspect isNil ifTrue:[
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"shortcut -- basic mechanism: visit instance variables by name"
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super visitChildrenOf:anObject.
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^ self.
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].
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childObjectDescriptors := self aspectElementDescriptorFor:anObject.
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childObjectDescriptors do:[:association|
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association notNil ifTrue:[
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association value acceptVisitor:self with:association key.
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self nextObject.
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].
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].
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"
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XMLStandardCoder new aspect:#elementDescriptorForInstanceVariables;
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encodingOf:('blaKey' -> 'blaValue')
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XMLStandardCoder new aspect:#elementDescriptorForInstanceVariables;
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encodingOf:('blaKey' -> nil)
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XMLStandardCoder new aspect:#elementDescriptorForNonNilInstanceVariables;
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encodingOf:('blaKey' -> nil)
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XMLStandardCoder new aspect:#blaFaselQuall;
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encodingOf:('blaKey' -> nil)
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"
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! !
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!AspectVisitor class methodsFor:'documentation'!
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version
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17892
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^ '$Header: /cvs/stx/stx/libbasic/AspectVisitor.st,v 1.1 2004/06/11 17:55:26 stefan Exp $'
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17865
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!
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version_SVN
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17911
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^ '$Id: AspectVisitor.st 10761 2012-01-19 11:46:00Z vranyj1 $'
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17846
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! !
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17892
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17910
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17911
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