"
COPYRIGHT (c) 1997 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:libjava' }"
Object subclass:#JavaObject
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Languages-Java-Classes'
!
!JavaObject class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1997 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.
"
! !
!JavaObject class methodsFor:'misc'!
resolveClassRefs
!
resolveClassRefsIgnoring:setOfClasses
! !
!JavaObject class methodsFor:'smalltalk interface'!
convertJavaObject:val signature:retValSignature
^ val.
retValSignature = 'void' ifTrue:[
^ #void
].
retValSignature = 'boolean' ifTrue:[
val == 0 ifTrue:[^ false].
^ true
].
retValSignature = 'int' ifTrue:[
val isInteger ifFalse:[
self halt
].
^ val
].
retValSignature = 'char[]' ifTrue:[
"/ these are ST-strings
^ val
].
retValSignature = 'char' ifTrue:[
"/ these are ST-characters
val isInteger ifTrue:[
^ Character value:val
].
self halt.
^ val
].
retValSignature = 'Object' ifTrue:[
^ val
].
retValSignature = 'String' ifTrue:[
^ Java as_ST_String:val
].
'no conversion for: ' print. val class name print. ' to: ' print. retValSignature printNL.
^ val.
"Modified: 8.8.1997 / 12:07:23 / cg"
!
javaStringFrom:aString
"hard-coding internas of java.lang.String here is bad ..."
self halt.
^ Java as_String:aString
"Modified: 7.8.1997 / 21:17:32 / cg"
!
stringFromJavaString:aJavaString
"hard-coding internas of java.lang.String here is bad ..."
self halt.
^ Java as_ST_String:aJavaString
"Modified: 8.8.1997 / 12:07:29 / cg"
! !
!JavaObject methodsFor:'initialization'!
initializeToZero
|sz|
sz := self class instSize.
1 to:sz do:[:i |
self instVarAt:i put:0
]
! !
!JavaObject methodsFor:'message sending'!
doesNotUnderstand:aMessage
"as a courtesy to the smalltalker, try to map methods"
|args numArgs javaMethod sel retVal m|
args := aMessage arguments.
numArgs := args size.
sel := aMessage selector.
javaMethod := JavaClass lookupMethod:sel numArgs:numArgs in:self class static:false.
javaMethod notNil ifTrue:[
args notNil ifTrue:[
args := JavaClass
convertArgsToJava:args
asSpecifiedIn:(javaMethod argSignature)
numArgs:numArgs.
].
javaMethod isWrapped ifTrue:[
m := javaMethod originalMethod
] ifFalse:[
m := javaMethod
].
retVal := javaMethod
valueWithReceiver:self
arguments:args
selector:m selector
search:m javaClass
sender:nil.
^ JavaClass convertToSmalltalk:retVal type:(m returnType).
].
^ super doesNotUnderstand:aMessage
"Modified: / 16.11.1998 / 16:50:56 / cg"
! !
!JavaObject methodsFor:'printing & storing'!
displayString
|myClass javaString|
myClass := self class.
myClass == Java java_lang_String ifTrue:[
^ '''' , (Java as_ST_String:self) , ''''
].
myClass == (Java at:'java.lang.Class') ifTrue:[
^ super displayString , '(' , (JavaVM classForJavaClassObject:self) displayString , ')'
].
myClass == (Java at:'java.lang.reflect.Method') ifTrue:[
^ super displayString , '(' , (JavaVM methodForJavaMethodObject:self) displayString , ')'
].
Object errorSignal handle:[:ex |
javaString := ''.
] do:[
javaString := Java as_ST_String:(self perform:#'toString()Ljava/lang/String;').
].
^ super displayString , ' (' , javaString , ')'.
"Modified: / 4.11.1998 / 18:35:00 / cg"
!
javaDisplayString
Object errorSignal handle:[:ex |
ex return.
] do:[
^ Java as_ST_String:(self perform:#toString).
].
^ super displayString.
"Created: / 7.4.1997 / 17:38:13 / cg"
"Modified: / 4.11.1998 / 21:07:19 / cg"
! !
!JavaObject methodsFor:'queries'!
isJavaClassRef
^ false
"Created: / 9.11.1999 / 17:13:37 / cg"
!
isJavaMethodRef
^ false
"Created: / 9.11.1999 / 15:43:21 / cg"
!
isJavaObject
^ true
"Created: 26.3.1997 / 13:34:17 / cg"
! !
!JavaObject methodsFor:'smalltalk interface'!
lookupMethod:selector numArgs:nargs
"lookup a method"
|method cls sel|
sel := selector.
(sel includes:$:) ifTrue:[
sel := sel copyTo:(sel indexOf:$:)-1
].
sel := sel asSymbolIfInterned.
sel notNil ifTrue:[
cls := self class.
[cls notNil and:[cls ~~ JavaObject]] whileTrue:[
cls methodDictionary keysAndValuesDo:[:jSel :aMethod |
(jSel == sel ) ifTrue:[
^ aMethod
]
].
cls methodDictionary keysAndValuesDo:[:jSel :aMethod |
(aMethod name = sel
or:[aMethod signatureNameWithoutReturnType = sel]) ifTrue:[
aMethod numArgs == nargs ifTrue:[
^ aMethod
]
]
].
cls := cls superclass.
].
].
^ nil
"
|stack|
stack := (Java at:'java.util.Stack') basicNew.
stack lookupMethod:#'<init>' numArgs:0.
"
"
|stack|
stack := (Java at:'java.util.Stack') new.
stack lookupMethod:#isEmpty numArgs:0.
"
"
|frame|
frame := (Java at:'java.awt.Frame') new.
frame lookupMethod:#'<init> (String)' numArgs:1.
"
"Modified: 22.3.1997 / 00:56:54 / cg"
! !
!JavaObject class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libjava/JavaObject.st,v 1.53 2002-11-22 20:09:11 cg Exp $'
! !