"
COPYRIGHT (c) 1995 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.
"
Model subclass:#Plug
instanceVariableNames:'simulatedProtocol'
classVariableNames:''
poolDictionaries:''
category:'Kernel-Objects'
!
!Plug class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1995 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
"
A Plug is an objcet which simulates a protocol and evaluates
a corresponding block when receiving messages.
Its main use is for the demo doIts, to play the role of a model.
Plugs are not used in the system and exist as a demo only.
This class may be changed/removed/replaced without notice.
"
!
examples
"
|plug|
plug := Plug new.
plug respondTo:#foo with:[Transcript showCr:'received foo'].
plug respondTo:#foo: with:[:arg | Transcript showCr:'received foo: ', arg printString].
plug foo.
plug foo:'some argument'
"
! !
!Plug class methodsFor:'instance creation'!
new
^ super basicNew privateInitialize
! !
!Plug methodsFor:'initialization'!
privateInitialize
"this method is NOT called initialize to allow plugging that
selector ..."
simulatedProtocol := IdentityDictionary new.
! !
!Plug methodsFor:'message sending'!
doesNotUnderstand:aMessage
|block|
block := simulatedProtocol at:aMessage selector ifAbsent:[].
block isNil ifTrue:[
^ super doesNotUnderstand:aMessage
].
^ block valueWithArguments:(aMessage arguments)
! !
!Plug methodsFor:'protocol definition'!
respondTo:aSelector with:aBlock
simulatedProtocol at:aSelector put:aBlock
! !
!Plug methodsFor:'queries'!
respondsTo:aSelector
(simulatedProtocol includesKey:aSelector) ifTrue:[^ true].
^ super respondsTo:aSelector
! !
!Plug class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libview2/Plug.st,v 1.7 1995-12-07 21:25:39 cg Exp $'
! !