"

 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:#JavaClassReader

	instanceVariableNames:'inStream msb constants majorVsn minorVsn constNeeds2Slots

		constSlot classBeingLoaded classLoader attributes'

	classVariableNames:'Verbose AnnotationsVerbose Silent AbsolutelySilent

		LazyClassLoading InvalidClassFormatSignal ClassLoaderQuerySignal

		JavaArchiveCache JavaArchiveCacheLock LastJavaArchive

		LastJavaArchiveLock MaxContextSize MaxContextSizeLimit

		InternedStrings'

	poolDictionaries:'JavaConstants'

	category:'Languages-Java-Support'

!

!JavaClassReader 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

"

! !

!JavaClassReader class methodsFor:'initialization'!

flushInternedStrings

    self initializeInternedStrings

    "Created: / 13-11-2014 / 12:13:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

initialize

    InvalidClassFormatSignal := Signal new mayProceed:true.

    InvalidClassFormatSignal notifierString:'class load failure'.

    InvalidClassFormatSignal nameClass:self message:#invalidClassFormatSignal.

    Verbose := false.

    Silent := true.

    AbsolutelySilent := false.

    "/LazyClassLoading := false.

    LazyClassLoading := true.

    ClassLoaderQuerySignal := QuerySignal new.

    ClassLoaderQuerySignal defaultAnswer:[ JavaVM systemClassLoader ].

    self initializeArchiveCache.

    JavaArchiveCacheLock := RecursionLock new.

    LastJavaArchiveLock := RecursionLock new.

    AnnotationsVerbose := false.

    MaxContextSize := 0.

     "Maximum stack depth supported by the VM.

     if you change it, make sure it is equal (or lower)

     to CONSIZE in jinterpret.c (line 111 or so)

     Otherwise, VM may crash!!!!!!"

    MaxContextSizeLimit := 100.

    self initializeInternedStrings.

    "

     JavaClassReader initialize"

    "Modified: / 27-01-1998 / 17:54:23 / cg"

    "Modified: / 17-12-2010 / 17:37:45 / Marcel Hlopko <hlopik@gmail.com>"

    "Modified: / 10-05-2011 / 23:59:53 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

    "Modified: / 14-08-2012 / 02:01:37 / jv"

    "Modified (comment): / 13-11-2014 / 12:12:11 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

initializeArchiveCache

    OperatingSystem isMSWINDOWSlike ifFalse:[

        JavaArchiveCache := CacheDictionary new:32.

    ] ifTrue:[

        JavaArchiveCache := CacheDictionary new:8.

    ]

!

initializeInternedStrings

     "Constant pool strings are interned to save memory

     and kept in InternedStrings variable"

    InternedStrings := Set new

    "Modified (comment): / 13-11-2014 / 12:12:31 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaClassReader class methodsFor:'Signal constants'!

classLoaderQuerySignal

    ^ ClassLoaderQuerySignal

    "Created: 14.8.1997 / 19:56:03 / cg"

!

invalidClassFormatSignal

    ^ InvalidClassFormatSignal

    "Created: 3.8.1997 / 18:17:21 / cg"

! !

!JavaClassReader class methodsFor:'constants'!

fileMajorVersions

    ^#(

        45  "Java 1.0.2"

        46  "Java 1.2"

        47  "???"

        48  "???"

        49  "Java 5"

        50  "Java 6"

      ).

    "

     JSR 202:

     The Java virtual machine implementation of Sun's JDK release 1.0.2 supports

     class file format versions 45.0 through 45.3 inclusive. Sun's JDK releases

     1.1.X can support class file formats of versions in the range 45.0 through

     45.65535 inclusive. For k > 1 implementations of version 1.k of the Java 2

     platform can support class file formats of versions in the range 45.0 through

     44+k.0 inclusive.

"

    "Created: / 19-10-2010 / 21:40:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 02-06-2011 / 22:50:17 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

    "Modified: / 18-08-2011 / 19:32:37 / jv"

    "Modified (comment): / 16-08-2012 / 15:34:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

fileMinorVersions

    ^ #(

        3 "Java 1.0.2 , Java 1.2"

        0 "Java 6"

    )

    "Created: / 19-10-2010 / 21:41:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

magic_LSB

    ^ 16rBEBAFECA

    "Modified: / 7.5.1998 / 13:14:27 / cg"

    "Created: / 7.5.1998 / 13:15:05 / cg"

!

magic_MSB

    ^ 16rCAFEBABE

    "Modified: / 7.5.1998 / 13:14:27 / cg"

! !

!JavaClassReader class methodsFor:'debugging'!

annotationsVerbose:aBoolean

    AnnotationsVerbose := aBoolean

    "

     Java flushClasses.

     JavaClassReader verbose:true

     JavaClassReader verbose:false"

    "Created: / 25-02-2011 / 12:25:23 / Marcel Hlopko <hlopik@gmail.com>"

!

verbose:aBoolean

    Verbose := aBoolean

    "

     Java flushClasses.

     JavaClassReader verbose:true

     JavaClassReader verbose:false

    "

! !

!JavaClassReader class methodsFor:'file reading'!

readClass: aClassName

    "reads a class, and returns it.

     <clinit> is NOT called, class is NOT installed"

    ^ self readClass: aClassName ignoring: Set new.

    "Created: / 15-04-1996 / 14:58:53 / cg"

    "Modified: / 20-10-1998 / 17:24:54 / cg"

    "Modified: / 08-09-2011 / 08:10:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified (comment): / 07-02-2013 / 14:21:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readClass: aClassName classPath: classPath

    "reads a class, and returns it.

     <clinit> is NOT called, class is NOT installed"

    ^ self readClass: aClassName ignoring: Set new classPath: classPath

    "Created: / 15-04-1996 / 14:58:53 / cg"

    "Modified: / 20-10-1998 / 17:24:54 / cg"

    "Modified: / 08-09-2011 / 08:10:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Created: / 30-10-2011 / 12:27:59 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified (comment): / 07-02-2013 / 14:21:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readClass: className ignoring: classesBeingLoadedOrNil

    "This method is bit hacky, as it tries to supply 'correct'

     classloader.

    If the class is loaded from Java release classPath (containing

    base java classes shipped with JDK/JRE), then set the classloader

    to null. Otherwise set class's loader to system class loader

    (as returned by ClassLoader#getSystemClassLoader())

    This is required to run groovy and other SW that uses resources

    or other classloader dependent stuff. When changing, make sure

    Groovy is running afterwards!!!!!!

    "

    | class |

    class := self

                readClass: className ignoring: classesBeingLoadedOrNil

                classPath: Java release classPath.

    class notNil ifTrue:[ ^ class ].

    class isNil ifTrue:[

        JavaVM booted ifFalse:[

            ^nil

        ].

        JavaClassReader classLoaderQuerySignal answer: JavaVM systemClassLoader do:[

            class := self

                readClass: className ignoring: classesBeingLoadedOrNil

                classPath: Java classPath.

        ].

    ].

    ^class

    "Created: / 15-04-1996 / 14:58:53 / cg"

    "Modified: / 20-10-1998 / 17:24:54 / cg"

    "Modified: / 21-10-2011 / 13:39:14 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

    "Modified: / 30-10-2011 / 16:50:05 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readClass: className ignoring: ignoring classPath: classPath

    | cls |

    cls := self new readClass: className ignoring: ignoring classPath: classPath.

    cls notNil ifTrue:[

        Logger

            log: 'loaded class ' , cls displayString

            severity: Logger severityTRACE

            facility: 'JVM'.

    ].

    ^cls.

    "Created: / 07-02-2013 / 14:34:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 02-03-2015 / 14:08:26 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readFile:aFilename ignoring:classesBeingLoaded

    "reads a class from aFilename and returns it.

     The JavaClass is NOT installed as global and unresolved

     refs are NOT patched."

    | inStream |

    [

        JavaVM commonOpenStreamUsing:[ inStream := aFilename asFilename readStream ]

    ] on:StreamError do:[:ex |

        Logger

            log:('cannot read .class file: ' , ex description) severity:Logger severityERROR facility:'JVM'.

        self breakPoint: #jv.

        ^ nil

    ].

    ^[

        self readStream:inStream ignoring:classesBeingLoaded.

    ] ensure:[

        inStream close.

    ].

    "Created: / 15-04-1996 / 14:58:53 / cg"

    "Modified: / 09-05-1998 / 01:44:24 / cg"

    "Modified: / 14-08-2012 / 02:17:26 / jv"

    "Modified: / 02-03-2015 / 14:08:14 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readStream: aStream

    "reads a class from aStream and returns it.

     The JavaClass is not installed as global"

    ^self readStream: aStream ignoring: Set new.

    "Created: / 24-10-2011 / 00:12:09 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readStream: stream ignoring: classesBeingLoaded

    "reads a class from aStream and returns it.

     The JavaClass is not installed as global"

    ^self readStream: stream loader: self classLoaderQuerySignal query ignoring: classesBeingLoaded

    "Modified: / 30-03-1998 / 18:14:40 / cg"

    "Modified: / 09-05-2011 / 23:15:30 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

    "Modified: / 02-05-2013 / 09:51:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readStream: stream loader: classloader

    "reads a class from aStream and returns it.

     The JavaClass is not installed as global"

    ^self readStream: stream loader: classloader ignoring: Set new.

    "Created: / 02-05-2013 / 09:51:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

readStream: stream loader: classloader ignoring: classesBeingLoaded

    "reads a class from aStream and returns it.

     The JavaClass is not installed as global"

    | javaClass |

    javaClass := JavaClassReader new readStream: stream loader: classloader ignoring: classesBeingLoaded.

    Logger

        log: 'loaded class ' , javaClass displayString

        severity: Logger severityTRACE

        facility: 'JVM'.

    ^ javaClass.

    "Created: / 02-05-2013 / 09:50:41 / Jan Vrany <jan.vrany@fit.cvut.cz>"

    "Modified: / 02-03-2015 / 14:08:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"

! !

!JavaClassReader class methodsFor:'obsolete'!

resolveClass: aJavaClass

    "Resolve a particular classes' constants.

     Perform all class initialization functions

     (of those which are not yet initialized)."

    | loader  classToLoad |

     "new resolving does not need this - shouldn't be called at all"

    LazyClassLoading ifFalse: [

        loader := (aJavaClass classLoader).

        [

            classToLoad := nil.

            aJavaClass constantPool do: [

                :item |

                | itemClass |

                itemClass := item class.

                itemClass == JavaUnresolvedClassConstant ifTrue: [

                    classToLoad := item className.

"/                ] ifFalse:[

"/                    itemClass == JavaUnresolvedMethodrefConstant ifTrue:[

"/self halt.

"/                    ] ifFalse:[

"/                        itemClass == JavaUnresolvedInterfaceMethodrefConstant ifTrue:[

"/self halt.

"/                        ]

"/                    ]

                ].

            ].

            classToLoad notNil ifTrue: [

                loader isNil ifTrue: [ JavaVM classForName: classToLoad. ] ifFalse: [

                    "/

                    "/ the aquired loader is a javaClassLoader

                    "/ which expects an URL as arg.

                    "/

                    "/ classURL := Java as_URL:('file:' , nextUnresolved asString , '.class').

                    "/ loader loadClass:classURL

                    loader perform: #'loadClass(Ljava/lang/String;)Ljava/lang/Class;'

                        with: (Java as_String: (classToLoad asString)).

                ]

            ].

            classToLoad notNil.

        ] whileTrue.

        aJavaClass isInitialized ifFalse: [

            Silent ifFalse: [

                'performing class initialization of ' print.

                aJavaClass fullName printCR.

            ].

            aJavaClass classInit

        ].

    ]

    "Created: / 20-10-1998 / 17:53:22 / cg"

    "Modified: / 16-11-2011 / 14:39:32 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

! !

!JavaClassReader class methodsFor:'others'!

version_HG

    ^ '$Changeset: <not expanded> $'

! !

!JavaClassReader methodsFor:'accessing'!

constantPoolAt: index

    ^ constants at: index

!

constants

    ^ constants.

    "Created: / 10-05-2011 / 13:48:30 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

!

constants: aJavaConstantPool

    constants := aJavaConstantPool.

    "Created: / 10-05-2011 / 13:48:46 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

!

stream

^ inStream.

    "Created: / 09-05-2011 / 23:22:38 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

!

stream:aReadStream

    inStream := aReadStream.

    "Created: / 09-05-2011 / 23:23:11 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"

! !

!JavaClassReader methodsFor:'file reading'!

readClass: clsName from: path ignoring: classesBeingLoaded

    "load class named clsName from directory or .jar archive path.

     <clinit> is NOT called, class is NOT installed as global"

    | nm  p  zar zarAndRefcount entry  zipFile  read rslt |

    p := path asString.

    p asFilename isDirectory ifTrue: [

        | f |

        (p endsWith: Filename separator) ifFalse: [

            p := p , (Filename separator asString)

        ].

        nm := p , clsName , '.class'.

        (f := nm asFilename) exists ifTrue: [

            (Java isExcludedFromClassPath: nm) ifFalse: [

                "means we are successfully going to read something :)"

                f readingFileDo:[:s|rslt := self readStream: s loader: self class classLoaderQuerySignal query ignoring: classesBeingLoaded].

                rslt notNil ifTrue: [ ^ rslt. ].

            ]