"
 COPYRIGHT (c) 2006 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:libtool' }"

"{ NameSpace: Tools }"

Object subclass:#MethodCategoryCache
	instanceVariableNames:'cachedMethodCategories lock'
	classVariableNames:'TheOneAndOnlyCache'
	poolDictionaries:''
	category:'Interface-Browsers-New'
!

!MethodCategoryCache class methodsFor:'documentation'!

copyright
"
 COPYRIGHT (c) 2006 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.
"
! !

!MethodCategoryCache class methodsFor:'instance creation'!

new
    TheOneAndOnlyCache isNil ifTrue:[
        TheOneAndOnlyCache := self basicNew initialize.
    ].
    ^ TheOneAndOnlyCache
! !

!MethodCategoryCache methodsFor:'accessing'!

allMethodCategories
    cachedMethodCategories isNil ifTrue:[
        self updateCachedMethodCategories
    ].
    ^ cachedMethodCategories
!

updateCachedMethodCategories
    lock critical:[
        cachedMethodCategories := Set new.
        Smalltalk allBehaviorsDo:[:eachClass |
            cachedMethodCategories addAll:eachClass categories 
        ].
    ].
! !

!MethodCategoryCache methodsFor:'change & update'!

update:something with:aParameter from:changedObject
    |removed|

    changedObject == Smalltalk ifTrue:[
        something == #methodInClassRemoved ifTrue:[
            cachedMethodCategories := nil.
            ^ self.
        ].
        (something == #classOrganization) ifTrue:[
            cachedMethodCategories := nil.
            ^ self.
        ].
        (something == #methodCategoryAdded) ifTrue:[
            cachedMethodCategories notNil ifTrue:[
                cachedMethodCategories add:(aParameter second).
            ].
            ^ self.
        ].
        (something == #methodCategoryRemoved) ifTrue:[
            cachedMethodCategories := nil.
            ^ self.
        ].
        (something == #methodCategoriesRemoved) ifTrue:[
            cachedMethodCategories := nil.
"/            removed := aParameter second asSet.
"/            Smalltalk allMethodsDo:[:m |
"/                |mCat|
"/                mCat := m category.
"/                (removed includes:mCat) ifTrue:[
"/                    removed remove:mCat.
"/                    removed isEmpty ifTrue:[^ self ].
"/                ].
"/            ].
"/            cachedMethodCategories removeAll:removed.
            ^ self.
        ].
        (something == #methodCategoryRenamed) ifTrue:[
            cachedMethodCategories := nil.
            ^ self.
        ].
        something == #methodInClass ifTrue:[
            ^ self.
        ].
        ^ self.
    ].
    super update:something with:aParameter from:changedObject
! !

!MethodCategoryCache methodsFor:'initialization'!

initialize
    lock := Semaphore forMutualExclusion.
    Smalltalk addDependent:self.
! !

!MethodCategoryCache class methodsFor:'documentation'!

version
    ^ '$Header: /cvs/stx/stx/libtool/Tools__MethodCategoryCache.st,v 1.3 2008-02-29 10:29:41 cg Exp $'
! !