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JavaRef subclass:#JavaField
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instanceVariableNames:'accessFlags name signature constantValue'
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classVariableNames:''
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poolDictionaries:''
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category:'Java-Reader-Support'
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!
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7
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!JavaField methodsFor:'error handling'!
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doesNotUnderstand:aMessage
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"this message is sent by the runtime system (VM) when
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a message is not understood by some object (i.e. there
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is no method for that selector). The original message has
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been packed into aMessage (i.e. the receiver, selector and
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any arguments) and the original receiver is then sent the
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#doesNotUnderstand: message.
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Here, we raise another signal which usually enters the debugger.
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You can of course redefine #doesNotUnderstand: in your classes
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to implement message delegation."
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|sel errorString cls sender|
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"/ handle the case of an error during early startup
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"/ (output streams not yet initialized)
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"/
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Stdout isNil ifTrue:[
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Smalltalk fatalAbort:'error during init: ' , aMessage selector , ' not understood'.
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].
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(sel := aMessage selector) isNil ifTrue:[
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"/
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"/ happens when things go mad, or a method has been
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"/ called by valueWithReceiver: with a wrong receiver
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"/ to avoud later trouble (when concatenating strings),
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"/ replace the selector by some (nonNil) string
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"/
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sel := '(nil)'
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].
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"/
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"/ extract the class that should have implemented the message.
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"/ (in case of a super-send, this is not the receivers class)
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"/
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sender := thisContext sender.
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cls := sender searchClass.
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cls isNil ifTrue:[
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"it was NOT a super or directed send ..."
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cls := self class
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].
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cls notNil ifTrue:[
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"/
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"/ displayString is better than 'cls name',
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"/ since it appends (obsolete) for outdated classes.
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"/ (this happens if you send messages to old instances
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"/ after changing a classes definition)
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"/
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errorString := cls displayString.
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] ifFalse:[
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errorString := '(** nil-class **)'
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].
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errorString := errorString , ' does not understand: ' , sel.
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"/
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"/ this only happens, when YOU play around with my classvars ...
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"/ (or an error occurs during early startup, when signals are not yet set)
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"/
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MessageNotUnderstoodSignal isNil ifTrue:[
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^ self enterDebuggerWith:nil
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message:'oops - MessageNotUnderstoodSignal is gone'.
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].
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"/
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"/ thats where we end up normally - raise a signal which (if unhandled) opens a debugger
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"/
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^ MessageNotUnderstoodSignal
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raiseRequestWith:aMessage
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errorString:errorString
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in:sender
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"Modified: 9.12.1995 / 17:25:37 / cg"
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"
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*** WARNING
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***
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*** this method has been automatically created,
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*** since all nil-subclasses should respond to some minimum required
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*** protocol.
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***
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*** Inspection and/or debugging of instances may not be possible,
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*** if you remove/change this method.
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"
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! !
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!JavaField methodsFor:'private accessing'!
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setAccessFlags:flags
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accessFlags := flags.
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"Created: 16.4.1996 / 13:04:25 / cg"
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!
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setConstantValue:something
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constantValue := something.
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"Created: 16.4.1996 / 13:04:58 / cg"
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!
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setName:aString
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name := aString.
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"Created: 16.4.1996 / 13:04:35 / cg"
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!
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setSignature:aString
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signature := aString.
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"Created: 16.4.1996 / 13:04:43 / cg"
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! !
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!JavaField methodsFor:'queries'!
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class
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"return the receivers class"
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%{ /* NOCONTEXT */
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RETURN ( __Class(self) );
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%}
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"
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*** WARNING
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***
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*** this method has been automatically created,
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*** since all nil-subclasses should respond to some minimum required
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*** protocol.
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***
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*** Inspection and/or debugging of instances may not be possible,
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*** if you remove/change this method.
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"
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!
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isBehavior
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"return true, if the receiver is some kind of class (i.e. behavior);
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false is returned here - the method is only redefined in Behavior."
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^ false
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"
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*** WARNING
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***
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*** this method has been automatically created,
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*** since all nil-subclasses should respond to some minimum required
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*** protocol.
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***
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*** Inspection and/or debugging of instances may not be possible,
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*** if you remove/change this method.
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"
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! !
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!JavaField class methodsFor:'documentation'!
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version
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^ '$Header: /home/jv/Projects/SmalltalkX/repositories/cvs/stx/libjava/JavaField.st,v 1.2 1996/04/16 14:41:33 cg Exp $'
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! !
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