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Object subclass:#JavaObject
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'Java-Classes'
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!
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!JavaObject class methodsFor:'misc'!
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resolveClassRefs
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! !
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!JavaObject class methodsFor:'queries'!
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browserClass
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"return the browser to use for this class -
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this can be redefined in special classes, to get different browsers"
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self == JavaObject ifTrue:[
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^ super browserClass
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].
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^ JavaBrowser
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! !
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!JavaObject methodsFor:'initialization'!
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initializeToZero
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1 to:self class instSize do:[:i |
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self instVarAt:i put:0
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]
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! !
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!JavaObject methodsFor:'message sending'!
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invokeJava:selector
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"send javaSelector (name+sig) message, without arguments"
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|method cls sel|
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sel := selector asSymbolIfInterned.
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sel notNil ifTrue:[
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cls := self class.
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[cls notNil] whileTrue:[
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method := cls compiledMethodAt:sel.
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method notNil ifTrue:[
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^ self invokeJavaMethod:method
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].
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cls := cls superclass.
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].
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].
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^ self doesNotUnderstand:(Message selector:selector)
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!
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invokeJava:selector with:arg
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"send javaSelector (name+sig) message, with 1 argument"
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|method cls sel|
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sel := selector asSymbolIfInterned.
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sel notNil ifTrue:[
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cls := self class.
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[cls notNil] whileTrue:[
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method := cls compiledMethodAt:sel.
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method notNil ifTrue:[
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^ self invokeJavaMethod:method with:arg
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].
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cls := cls superclass.
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].
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].
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^ self doesNotUnderstand:(Message selector:selector)
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!
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invokeJavaMethod:aJavaMethod
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"invoke java method, without arguments"
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|i val|
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aJavaMethod numArgs ~~ 0 ifTrue:[
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self halt:'need arguments'
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].
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i := JavaInterpreter new.
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i push:self.
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val := i interpret:aJavaMethod sender:thisContext sender.
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^ self convertJavaObject:val signature:(aJavaMethod retValSignature)
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!
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invokeJavaMethod:aJavaMethod with:arg
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"invoke java method, with one argument"
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|i val|
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aJavaMethod numArgs ~~ 1 ifTrue:[
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self halt:'argument count'
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].
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i := JavaInterpreter new.
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i push:self.
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i push:arg.
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val := i interpret:aJavaMethod sender:thisContext sender.
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^ self convertJavaObject:val signature:(aJavaMethod retValSignature)
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! !
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!JavaObject methodsFor:'printing & storing'!
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displayString
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^ super displayString. "/ ^ 'a JavaObject(' , self class name , ')'
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! !
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!JavaObject methodsFor:'smalltalk interface'!
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convertJavaObject:val signature:retValSignature
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retValSignature = 'void' ifTrue:[
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^ #void
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].
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retValSignature = 'boolean' ifTrue:[
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val == 0 ifTrue:[^ false].
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^ true
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].
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retValSignature = 'int' ifTrue:[
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val isInteger ifFalse:[
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self halt
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].
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^ val
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].
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retValSignature = 'char[]' ifTrue:[
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"/ these are ST-strings
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^ val
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].
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retValSignature = 'char' ifTrue:[
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"/ these are ST-characters
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val isInteger ifTrue:[
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^ Character value:val
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].
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self halt.
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^ val
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].
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retValSignature = 'Object' ifTrue:[
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^ val
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].
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'no conversion for: ' print. val class name print. ' to: ' print. retValSignature printNL.
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^ val.
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!
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invoke:selector
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"send a message, without args"
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|method cls sel|
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sel := selector asSymbolIfInterned.
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sel notNil ifTrue:[
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cls := self class.
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[cls notNil and:[cls ~~ JavaObject]] whileTrue:[
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cls methodArray do:[:aMethod |
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"/ aMethod name printNL.
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aMethod name == selector ifTrue:[
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aMethod numArgs == 0 ifTrue:[
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^ self invokeJavaMethod:aMethod
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]
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]
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].
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cls := cls superclass.
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].
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].
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^ self doesNotUnderstand:(Message selector:selector)
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"
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|stack|
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stack := (Java at:'java/util/Stack') basicNew.
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stack invoke:#'<init>'.
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"
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"
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|stack|
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stack := (Java at:'java/util/Stack') basicNew.
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stack invoke:#isEmpty.
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"
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"
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|stack|
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stack := (Java at:'java/util/Stack') basicNew.
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stack invoke:#size.
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"
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!
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invoke:selector with:argument
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"send a message, with 1 argument. This method needs more work."
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|sel method cls argClass jSel|
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sel := selector asSymbolIfInterned.
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sel notNil ifTrue:[
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"/
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"/ hard to do - must find a matching method probably
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"/
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(argument isKindOf:JavaObject) ifTrue:[
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argClass := argument class.
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] ifFalse:[
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"/
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"/ map to Java:
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"/ String -> [c
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"/
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(argument isMemberOf:String) ifTrue:[
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jSel := (selector , '([C)V') asSymbolIfInterned.
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jSel notNil ifTrue:[
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^ self invokeJava:jSel with:argument
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]
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]
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].
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cls := self class.
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[cls notNil and:[cls ~~ JavaObject]] whileTrue:[
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cls methodArray do:[:aMethod |
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aMethod name == sel ifTrue:[
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aMethod numArgs == 1 ifTrue:[
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"/
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"/ this is not completely correct:
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"/ must look for the best type-match,
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"/ (especially: have to look for best match
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"/ over whole superclass chain ...)
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"/ for now take the first with matching number of args
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"/
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^ self invokeJavaMethod:aMethod with:argument
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]
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]
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].
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cls := cls superclass.
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].
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].
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^ self doesNotUnderstand:(Message selector:selector)
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"
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|stack|
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stack := (Java at:'java/util/Stack') new.
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stack invoke:#push with:1.
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"
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! !
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!JavaObject class methodsFor:'documentation'!
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version
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^ '$Header: /home/jv/Projects/SmalltalkX/repositories/cvs/stx/libjava/JavaObject.st,v 1.6 1996/05/03 11:29:12 cg Exp $'
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! !
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