"

 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 $'

! !