"
 COPYRIGHT (c) 1999 by eXept Software AG
              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.
"
"{ Package: 'stx:libbasic' }"

Metaclass subclass:#AutoloadMetaclass
	instanceVariableNames:''
	classVariableNames:''
	poolDictionaries:''
	category:'Kernel-Classes'
!

!AutoloadMetaclass class methodsFor:'documentation'!

copyright
"
 COPYRIGHT (c) 1999 by eXept Software AG
              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
"
    AutoloadMetaclass catches unhandled class methods, files in 
    the corresponding code when first used and resends the catched
    message to the now existing class.

    Autoload installs AutoloadMetaclass as its metaclass in #initialize. 

    [author:]
        Stefan Vogel

    [see also:]
        Autoload
"
! !

!AutoloadMetaclass class methodsFor:'queries'!

isLoaded
    "return true, if the class has been loaded.
     Autoload itself is loaded, subclasses are not.
     This allows testing wether a class has already been loaded."

    ^ (self == AutoloadMetaclass)
! !

!AutoloadMetaclass methodsFor:'message catching'!

doesNotUnderstand:aMessage
    "caught a message; load the class and retry the message"

    |newClass|

    self ~~ AutoloadMetaclass ifTrue:[
        newClass := myClass autoload.
        newClass notNil ifTrue:[
            ^ aMessage sendTo:newClass class 
        ]
    ].
    ^ super doesNotUnderstand:aMessage

    "
     Autoload xxx

     VisualPart unload.
     VisualPart xxx

     VisualPart unload.
     VisualPart defaultFont
    "

    "Modified: / 3.8.1999 / 13:57:05 / stefan"
! !

!AutoloadMetaclass class methodsFor:'documentation'!

version
    ^ '$Header: /cvs/stx/stx/libbasic/AutoloadMetaclass.st,v 1.4 2008-08-06 09:41:34 cg Exp $'
! !