"

 COPYRIGHT (c) 1996-2015 by Claus Gittinger

 New code and modifications done at SWING Research Group [1]:

 COPYRIGHT (c) 2010-2015 by Jan Vrany, Jan Kurs and Marcel Hlopko

                            SWING Research Group, Czech Technical University in Prague

 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.

 [1] Code written at SWING Research Group contains a signature

     of one of the above copright owners. For exact set of such code,

     see the differences between this version and version stx:libjava

     as of 1.9.2010

"

"{ Package: 'stx:libjava' }"

"{ NameSpace: Smalltalk }"

Object subclass:#JavaObject

	instanceVariableNames:'_lockWord_'

	classVariableNames:''

	poolDictionaries:''

	category:'Languages-Java-Classes'

!

!JavaObject class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1996-2015 by Claus Gittinger

 New code and modifications done at SWING Research Group [1]:

 COPYRIGHT (c) 2010-2015 by Jan Vrany, Jan Kurs and Marcel Hlopko

                            SWING Research Group, Czech Technical University in Prague

 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.

 [1] Code written at SWING Research Group contains a signature

     of one of the above copright owners. For exact set of such code,

     see the differences between this version and version stx:libjava

     as of 1.9.2010

"

!

documentation

"

    'Proto' class for all Java classes: java.lang.Object inherits 

    from JavaObject class. Methods provided here are provides a 'glue' 

    code necessary to integrate Java objects into Smalltalk world.

    The 'lock' instance variable here is to support Java monitors.

    It contains either smalltinteger with lockword or a reference to

    full JavaMonitor.

    [author:]

        Claus Gittinger

        Jan Vrany <jan.vrany@fit.cvut.cz>

    [instance variables:]

        _lockWord_  <SmallInteger|JavaMonitor>  either thin-locing lock word

                                                or fat-lock (JavaMonitor). The funny name

                                                here is to prevent name clashes

    [class variables:]

    [see also:]

"

! !

!JavaObject class methodsFor:'misc'!

resolveClassRefs

!

resolveClassRefsIgnoring:setOfClasses

! !

!JavaObject class methodsFor:'queries'!

isCloneable

    ^ false

    "Created: / 12-11-2013 / 11:09:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!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:'accessing-Java'!

getJavaLockWord

    "Returns a Java lock word for given object. The returned

     value is 

        - either SmallInteger that encodes the thinlock

        - or a fat lock, instance of JavaMonitor

    "

    "/For nonJava objects, always return fatlock

    ^_lockWord_

    "Created: / 26-08-2012 / 14:03:59 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

getJavaMonitor

    "Returns fat JavaMonitor associated with the receiver"

    "/ For Java objects, check if there is allready a thinlock,

    "/ inflate it and return the fatlock

    _lockWord_ class == SmallInteger ifTrue:[

        _lockWord_ := JavaVM inflateLockFor: self lockword: _lockWord_.

    ].

    ^_lockWord_

    "Created: / 26-08-2012 / 18:35:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

hasJavaLockWord

    "Returns true, if a Java lock word is present"

    "/For nonJava objects, always return falseatlock

    ^ true

!

setJavaLockWord: lockWordOrJavaMonitor

    "Sets a Java lock word for receiver to lockWordOrJavaMonitor. 

     The lockWordOrJavaMonitor must be:

        - either SmallInteger that encodes the thinlock

        - or a fat lock, instance of JavaMonitor

    "

    "/for non-Java objects, store fat lock in LockTable in JavaVM

    ^_lockWord_ := lockWordOrJavaMonitor

    "Created: / 26-08-2012 / 14:07:14 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'comparing'!

= anotherObject

    ^ (self perform: #'equals(Ljava/lang/Object;)Z' with: anotherObject) == 1

    "Created: / 07-10-2013 / 17:32:33 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

hash

    ^ self perform: #'hashCode()I'

    "Created: / 07-10-2013 / 17:31:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'exception handling support'!

catchInDebugger

   "if set, the debugger will handle this signal in its event loop and will close itself

     without asking for close-confirmation.

     This allows for debugged processes to be terminated without a user confirmation dialog

     (for now, this is used in expecco's hard-terminate function to shut down any open debuggers

      together with the test-process).

     Dummy here"

    ^false

    "Created: / 20-08-2012 / 14:15:51 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

creator

    self class isThrowable ifTrue:[

        ^self class.

    ].

    ^super creator

    "Created: / 14-10-2013 / 11:31:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

description

    self class isThrowable ifTrue:[

        ^self getMessage

    ].

    ^super description

    "Created: / 20-08-2012 / 14:19:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

handlerForSignal:exceptionHandler context:theContext originator:originator

    ^nil

!

isQuerySignal

    ^false

    "Created: / 18-03-2012 / 13:11:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

parent

    "Required for old instance based exceptions, sigh"

    ^nil

    "Created: / 18-03-2012 / 13:26:41 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

signal

    self class isThrowable ifTrue:[

        ^self class.

    ].

    ^super signal

    "Created: / 20-08-2012 / 14:15:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'finalization'!

finalizationLobby

"/    ^super finalizationLobby

    ^JavaVM finalizationLobby "/ Do not use this yet!!

    "Created: / 24-07-2012 / 01:04:53 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'initialization'!

initialize

    self perform:#'<init>()V'.

    "Created: / 09-06-2012 / 21:49:37 / Jan Kurs (kursjan@fit.cvut.cz)"

!

initializeToZero

    |sz|

    sz := self class instSize.

    1 to:sz do:[:i |

	self instVarAt:i put:0

    ]

! !

!JavaObject methodsFor:'message sending'!

doesNotUnderstand:aMessage

    <resource: #skipInDebuggersWalkBack>

    | sender retval didNotUnderstood |

    "/ When we arrive here, the stack is:

    "/   1 - JavaObject>>doesNotUnderstand: (i.e., this method)

    "/   2 - context for not understood method (created by VM to hold arguments)

    "/   3 - context of method that sent the not understood message

    "/ Hence the `thisContext sender sender below.

    sender := thisContext sender sender.

    didNotUnderstood := false.

    retval := self class perform: aMessage onReceiver: self from: sender ifNotFound: [ didNotUnderstood :=  true ].

    ^ didNotUnderstood ifTrue:[

        super doesNotUnderstand: aMessage .

    ] ifFalse:[

        retval

    ].

    "Modified: / 16-11-1998 / 16:50:56 / cg"

    "Modified: / 19-09-2011 / 23:43:56 / Jan Kurs <kursjan@fit.cvut.cz>"

    "Modified: / 01-01-2012 / 19:49:35 / kursjan <kursjan@fit.cvut.cz>"

! !

!JavaObject methodsFor:'printing & storing'!

basicPrintOn: aStream

    aStream nextPutAll: self class javaName.

    aStream nextPut:$@.

    self identityHash printOn: aStream.

    "Created: / 13-04-2012 / 17:34:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 08-10-2013 / 22:46:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

displayString

    JavaVM booted ifTrue:[

        | toStringM toString |

        toStringM := self class lookupSelector: #'toString()Ljava/lang/String;'.

        (toStringM javaClass binaryName ~~ #'java/lang/Object') ifTrue:[

            [ 

                toString := Java as_ST_String:(self perform:#'toString()Ljava/lang/String;').

            ] on: Error do: [ 

                toString := nil 

            ].        

        ].

        toString notNil ifTrue:[        

            ^toString

        ]

    ].

    ^String streamContents: [:s|self basicPrintOn: s]

    "Modified: / 04-11-1998 / 18:35:00 / cg"

    "Modified: / 28-01-2011 / 15:10:05 / Marcel Hlopko <hlopik@gmail.com>"

    "Modified: / 08-10-2013 / 22:46:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

printOn: aStream

    |myClassName |

    myClassName := self class binaryName.

    myClassName == #'java/lang/String' ifTrue:[

        aStream nextPut:$".

        aStream nextPutAll: (Java as_ST_String: self).

        aStream nextPut:$".

        ^self.

    ].

    myClassName == #'java/lang/Class' ifTrue:[

        super printOn: aStream.

        aStream nextPut: $(.

        (JavaVM reflection classForJavaClassObject:self) javaMirror getName printOn: aStream.

        aStream nextPut: $).

        ^self.

    ].

    myClassName == #'java.lang.reflect.Method' ifTrue:[

        super printOn: aStream.

        aStream nextPut: $(.

        (JavaVM reflection methodForJavaMethodObject:self) printOn: aStream.

        aStream nextPut: $).

        ^self.

    ].

    JavaVM booted ifTrue:[

        | toString |

        [ toString := Java as_ST_String:(self perform:#'toString()Ljava/lang/String;').]

            on: Error do: [ toString := nil ].        

        toString notNil ifTrue:[        

            "/super printOn: aStream.

            "/aStream nextPut: $(.

            aStream nextPutAll: toString.

            "/aStream nextPut: $).

            ^self.

        ] 

    ].

    super printOn: aStream.

    "Created: / 04-12-2011 / 10:29:08 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 08-10-2013 / 22:47:17 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'queries'!

instanceOf: aJavaClassOrJavaClassAccessor

    "A Smalltalk-friendly version  of Java language `instanceof` operator.

     The difference between #instanceOf and #isKindOf: is that

     #instanceOf: takes interfaces into an account whereas

     #isKindOf: not.

     NOTE: It's up to an discussion whethere #isKindOf: sent to

     a java object should or should not behave as #instanceOf:.

     Maybe in future they will be the same."

    | class |

    class := aJavaClassOrJavaClassAccessor class == JavaClassAccessor 

                ifTrue:[aJavaClassOrJavaClassAccessor theClass]

                ifFalse:[aJavaClassOrJavaClassAccessor].

    ^ (JavaVM _INSTANCEOF: self _: class) == 1.

    "Created: / 09-10-2013 / 22:36:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified (comment): / 10-10-2013 / 16:35:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

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"

!

size

    "What a hack!!!!!!"

    ^(self respondsTo:#'size()I') ifTrue:[

        self perform:#'size()I'

    ] ifFalse:[

        super size.    

    ]

    "Created: / 29-02-2012 / 14:25:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaObject methodsFor:'smalltalk interface'!

lookupMethod:selector numArgs:nargs

    "lookup a method"

    |method cls sel|

    sel := selector.