"{ Package: 'stx:libjava' }"
Object subclass:#JavaResolver
instanceVariableNames:'exceptionThrower'
classVariableNames:'uniqueInstance'
poolDictionaries:''
category:'Languages-Java-Reader-Support-new'
!
!JavaResolver class methodsFor:'initialization'!
initialize
uniqueInstance := JavaResolver new.
uniqueInstance exceptionThrower: JavaVM.
"/has methods at: and at: put:
"/uniqueInstance resolvedClasses: Java.
"Modified: / 10-04-2011 / 10:23:43 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 13-04-2011 / 14:07:35 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver class methodsFor:'instance creation'!
uniqueInstance
^uniqueInstance.
"Created: / 08-04-2011 / 17:36:37 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 11-04-2011 / 19:06:49 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'accessing'!
exceptionThrower
^ exceptionThrower
!
exceptionThrower:something
exceptionThrower := something.
! !
!JavaResolver methodsFor:'class resolving'!
checkIfPrimitiveArrayRef: aJavaClassRef andWrap: result
^ (JavaDescriptor readFromString: aJavaClassRef name) javaClass.
"Created: / 23-05-2011 / 21:12:04 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
resolveClassIndentifiedByRef: aJavaClassRef
| classLoader result |
self validateClassRef: aJavaClassRef.
result := self lookupClassIfAlreadyResolved: aJavaClassRef javaClassName.
result ifNotNil:
[ "/wrap result with array(s) if needed and return it
self checkIfArrayRef: aJavaClassRef andWrap: result ].
"
To resolve an unresolved symbolic reference from D to a class or interface C denoted by N,
the following steps are performed:
The defining class loader of D is used to create a class or interface denoted by N.
This class or interface is C. Any exception that can be thrown as a result of failure
of class or interface creation can thus be thrown as a result of failure of class and
interface resolution. The details of the process are given in Section 5.3.
"
classLoader := aJavaClassRef classLoader.
classLoader isNil
ifTrue: [ result := self loadUnresolvedClass: aJavaClassRef ]
ifFalse:
[ result := self loadUnresolvedClass: aJavaClassRef
withJavaClassLoader: classLoader. ].
result ifNil:
[ self halt.
"tell mh, he will throw exception instead, for now, he wants to halt." ].
result isJavaPrimitiveType
ifTrue: [ ^ self checkIfPrimitiveArrayRef: aJavaClassRef andWrap: result ].
result classInit.
"
If C is an array class and its element type is a reference type, then the symbolic reference
to the class or interface representing the element type is resolved by invoking the algorithm
in Section 5.4.3.1 recursively."
result := self checkIfArrayRef: aJavaClassRef andWrap: result.
"Finally, access permissions to C are checked:
If C is not accessible (5.4.4) to D, class or interface resolution throws an IllegalAccessError.
This condition can occur, for example, if C is a class that was originally declared to be
public but was changed to be non-public after D was compiled.
If steps 1 and 2 succeed but step 3 fails, C is still valid and usable. Nevertheless, resolution
fails, and D is prohibited from accessing C."
(self checkPermissionsFrom: aJavaClassRef owner to: result)
ifTrue: [ ^ result ]
ifFalse: [ self throwIllegalAccessError ].
"Created: / 11-04-2011 / 19:07:19 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 22-05-2011 / 17:59:23 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 23-05-2011 / 21:11:32 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'class resolving helpers'!
checkIfArrayRef: aJavaClassRef andWrap: result
"/wrap result with array(s) if needed and return it
^ aJavaClassRef isJavaArrayClassRef
ifFalse: [ result ]
ifTrue: [ self wrapJavaClass: result withArrayAsSpecifiedIn: aJavaClassRef ]
"Modified: / 11-04-2011 / 19:31:43 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
checkPermissionsFrom: refOwner to: resolvedClass
"
A class or interface C is accessible to a class or interface D if and only if either of the following conditions are true:
C is public.
C and D are members of the same runtime package (§5.3).
Finally, access permissions to C are checked:
If C is not accessible (§5.4.4) to D, class or interface resolution throws an IllegalAccessError.
This condition can occur, for example, if C is a class that was originally declared to be
public but was changed to be non-public after D was compiled.
At run time, a class or interface is determined not by its name alone,
but by a pair: its fully qualified name and its defining class loader.
Each such class or interface belongs to a single runtime package. The runtime
package of a class or interface is determined by the package name and
defining class loader of the class or interface."
resolvedClass isPublic ifTrue: [ ^ true ].
resolvedClass classLoader = refOwner classLoader ifFalse: [ ^ false ].
^ refOwner javaPackage = resolvedClass javaPackage.
"Created: / 11-04-2011 / 19:35:21 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 23:13:39 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
loadUnresolvedClass: aJavaClassRef
| nm |
nm := aJavaClassRef javaClassName.
nm size == 1
and: [ JavaDescriptor baseTypes at: nm first ifPresent: [:cls | ^ cls ] ].
^ Java classForName: aJavaClassRef javaClassName.
"Created: / 11-04-2011 / 19:27:10 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 22-05-2011 / 17:58:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 23-05-2011 / 21:06:25 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
loadUnresolvedClass: aJavaClassRef withJavaClassLoader: classLoader
| jClass |
jClass := classLoader
perform: #'loadClass(Ljava/lang/String;)Ljava/lang/Class;'
with: (Java as_String: (aJavaClassRef name)).
^JavaVM reflection classForJavaClassObject: jClass.
"Modified: / 18-05-2011 / 14:52:39 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
lookupClassIfAlreadyResolved: javaClassName
^ nil
"Modified: / 13-04-2011 / 14:05:25 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
validateClassRef: aJavaClassRef
self assert: aJavaClassRef isJavaRef.
self assert: aJavaClassRef isJavaClassRef .
"Modified: / 23-05-2011 / 21:04:00 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
wrapJavaClass: aJavaClass withArrayAsSpecifiedIn: aJavaClassRef
"wraps aJavaClass with as many array dimensions as needed (zero means no array)"
| arrayClass |
aJavaClassRef isJavaArrayClassRef ifFalse: [ ^ aJavaClass ].
aJavaClassRef arrayDimensions timesRepeat:
[ arrayClass := aJavaClass.
arrayClass := arrayClass arrayClass. ].
^ arrayClass.
"Created: / 08-04-2011 / 18:40:00 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 22-05-2011 / 17:48:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 23-05-2011 / 21:06:41 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'common helpers'!
checkPermissionsForMethodOrField: aJavaMethodOrField from: accessingJavaClass to: resolvedJavaClass
"A class or interface C is accessible to a class or interface D if
and only if either of the following conditions are true:
C is public.
C and D are members of the same runtime package (§5.3).
A field or method R is accessible to a class or interface D if and only
if any of the following conditions is true:
R is public.
R is protected and is declared in a class C, and D is either a subclass
of C or C itself.
R is either protected or package private (that is, neither public nor
protected nor private), and is declared by a class in the same runtime
package as D.
R is private and is declared in D.
This discussion of access control omits a related restriction on the target
of a protected field access or method invocation (the target must be of class
D or a subtype of D). That requirement is checked as part of the verification
process (§5.4.1); it is not part of link-time access control."
(self checkPermissionsFrom: accessingJavaClass to: resolvedJavaClass)
ifFalse: [ ^ false ].
aJavaMethodOrField isPublic ifTrue: [ ^ true ].
((aJavaMethodOrField isProtected and:
[ resolvedJavaClass javaComponentClass
equalsOrIsSubclassOf: aJavaMethodOrField javaClass ])
and:
[ accessingJavaClass javaComponentClass
equalsOrIsSubclassOf: aJavaMethodOrField javaClass ])
ifTrue: [ ^ true ].
((aJavaMethodOrField isPrivate not
and: [ resolvedJavaClass javaPackage = accessingJavaClass javaPackage ])
and: [ resolvedJavaClass classLoader = accessingJavaClass classLoader ])
ifTrue: [ ^ true ].
(aJavaMethodOrField isPrivate
and: [ aJavaMethodOrField javaClass = accessingJavaClass ])
ifTrue: [ ^ true ].
^ false.
"Created: / 14-04-2011 / 14:19:33 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 30-05-2011 / 23:32:55 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'exceptions'!
throwAbstractMethodError
exceptionThrower throwAbstractMethodError.
"Created: / 11-04-2011 / 20:19:42 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 14:07:46 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
throwIllegalAccessError
exceptionThrower throwIllegalAccessError.
"Created: / 11-04-2011 / 19:39:16 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 23:06:58 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
throwIncompatibleClassChangeError
exceptionThrower throwIncompatibleClassChangeError.
"Created: / 11-04-2011 / 20:02:01 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 14:07:54 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
throwNoSuchFieldException
exceptionThrower throwNoSuchFieldException.
"Created: / 11-04-2011 / 21:35:02 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 14:07:57 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
throwNoSuchMethodError
exceptionThrower throwNoSuchMethodError.
"Created: / 11-04-2011 / 20:19:41 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 14:08:01 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'field resolving'!
resolveFieldIndentifiedByRef: aJavaFieldRef
| result class |
self validateFieldRef: aJavaFieldRef.
result := self lookupFieldIfAlreadyResolved: aJavaFieldRef.
result ifNotNil: [ ^ result ].
class := aJavaFieldRef classRef resolve.
class ifNil: [ self halt: 'should not happen - tell mh' ].
result := class lookupFieldByNameAndType: aJavaFieldRef nameAndType.
result ifNil: [ self throwNoSuchFieldException ].
(self
checkPermissionsForField: result
from: aJavaFieldRef classRef owner
to: class) ifFalse: [ self throwIllegalAccessError ].
^ result.
"
To resolve an unresolved symbolic reference from D to a field in a class
or interface C, the symbolic reference to C given by the field reference
must first be resolved (§5.4.3.1). Therefore, any exception that can be
thrown as a result of failure of resolution of a class or interface reference
can be thrown as a result of failure of field resolution. If the reference
to C can be successfully resolved, an exception relating to the failure of
resolution of the field reference itself can be thrown.
When resolving a field reference, field resolution first attempts to look
up the referenced field in C and its superclasses:
If C declares a field with the name and descriptor specified by the field
reference, field lookup succeeds. The declared field is the result of the
field lookup.
Otherwise, field lookup is applied recursively to the direct superinterfaces
of the specified class or interface C.
Otherwise, if C has a superclass S, field lookup is applied recursively to S.
Otherwise, field lookup fails.
If field lookup fails, field resolution throws a NoSuchFieldError. Otherwise,
if field lookup succeeds but the referenced field is not accessible (§5.4.4)
to D, field resolution throws an IllegalAccessError.
Otherwise, let <E, L1> be the class or interface in which the referenced
field is actually declared and let L2 be the defining loader of D. Let T be
the name of the type of the referenced field. The Java virtual machine must
impose the loading constraint that TL1=TL2(§5.3.4)."
"Created: / 11-04-2011 / 21:15:20 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 11:57:24 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
resolveStaticFieldIndentifiedByRef: aJavaFieldRef
| result class |
self validateFieldRef: aJavaFieldRef.
result := self lookupFieldIfAlreadyResolved: aJavaFieldRef.
result ifNotNil: [ ^ result ].
class := aJavaFieldRef classRef resolve.
class ifNil: [ self halt: 'should not happen - tell mh' ].
result := class lookupStaticFieldByNameAndType: aJavaFieldRef nameAndType.
result ifNil: [ self throwNoSuchFieldException ].
(self
checkPermissionsForField: result
from: aJavaFieldRef classRef owner
to: class) ifFalse: [ self throwIllegalAccessError ].
^ result.
"
To resolve an unresolved symbolic reference from D to a field in a class
or interface C, the symbolic reference to C given by the field reference
must first be resolved (§5.4.3.1). Therefore, any exception that can be
thrown as a result of failure of resolution of a class or interface reference
can be thrown as a result of failure of field resolution. If the reference
to C can be successfully resolved, an exception relating to the failure of
resolution of the field reference itself can be thrown.
When resolving a field reference, field resolution first attempts to look
up the referenced field in C and its superclasses:
If C declares a field with the name and descriptor specified by the field
reference, field lookup succeeds. The declared field is the result of the
field lookup.
Otherwise, field lookup is applied recursively to the direct superinterfaces
of the specified class or interface C.
Otherwise, if C has a superclass S, field lookup is applied recursively to S.
Otherwise, field lookup fails.
If field lookup fails, field resolution throws a NoSuchFieldError. Otherwise,
if field lookup succeeds but the referenced field is not accessible (§5.4.4)
to D, field resolution throws an IllegalAccessError.
Otherwise, let <E, L1> be the class or interface in which the referenced
field is actually declared and let L2 be the defining loader of D. Let T be
the name of the type of the referenced field. The Java virtual machine must
impose the loading constraint that TL1=TL2(§5.3.4)."
"Created: / 28-04-2011 / 22:31:34 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'field resolving helpers'!
checkPermissionsForField: aJavaField from: accessingJavaClass to: resolvedJavaClass
"A class or interface C is accessible to a class or interface D if and only
if either of the following conditions are true:
C is public.
C and D are members of the same runtime package (5.3).
A field or method R is accessible to a class or interface D if and only
if any of the following conditions is true:
R is public.
R is protected and is declared in a class C, and D is either a subclass of
C or C itself.
R is either protected or package private (that is, neither public nor protected
nor private), and is declared by a class in the same runtime package as D.
R is private and is declared in D.
This discussion of access control omits a related restriction on the target of
a protected field access or method invocation (the target must be of class D or
a subtype of D). That requirement is checked as part of the verification process
(5.4.1); it is not part of link-time access control."
^ self
checkPermissionsForMethodOrField: aJavaField from: accessingJavaClass
to: resolvedJavaClass.
"Created: / 11-04-2011 / 21:46:29 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 14-04-2011 / 14:21:05 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
lookupFieldIfAlreadyResolved: aJavaFieldRef
^ nil.
"Created: / 11-04-2011 / 21:16:45 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 11:57:13 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
validateFieldRef: aJavaFieldRef
aJavaFieldRef isJavaRef ifFalse:[self halt:'I expected Java Ref'].
aJavaFieldRef isJavaFieldRef ifFalse:[self halt:'I expected Java Field Ref'].
"Created: / 11-04-2011 / 21:16:44 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'interface method resolving'!
resolveInterfaceMethodIdentifiedByRef: aJavaInterfaceMethodRef
| result class |
self validateInterfaceMethodRef: aJavaInterfaceMethodRef.
result := self
lookupInterfaceMethodIfAlreadyResolved: aJavaInterfaceMethodRef.
result ifNotNil: [ ^ result ].
class := aJavaInterfaceMethodRef classRef resolve.
class ifNil: [ self halt: 'should not happen - tell mh' ].
class isInterface ifFalse: [ self throwIncompatibleClassChangeError ].
result := class
lookupMethodByNameAndType: aJavaInterfaceMethodRef nameAndType.
result ifNil: [ self throwNoSuchMethodError ].
(self
checkPermissionsForMethod: result
from: aJavaInterfaceMethodRef classRef owner
to: class) ifFalse: [ self throwIllegalAccessError ].
^ result.
"
To resolve an unresolved symbolic reference from D to an interface method in an
interface C, the symbolic reference to C given by the interface method reference is
first resolved (§5.4.3.1). Therefore, any exceptions that can be thrown as a result
of failure of resolution of an interface reference can be thrown as a result of
failure of interface method resolution. If the reference to C can be successfully
resolved, exceptions relating to the resolution of the interface method reference
itself can be thrown.
When resolving an interface method reference:
If C is not an interface, interface method resolution throws an IncompatibleClassChangeError.""Otherwise, if the referenced method does not have the same name and descriptor as
a method in C or in one of the superinterfaces of C, or in class Object, interface
method resolution throws a NoSuchMethodError.
Otherwise, let <E, L1> be the interface in which the referenced interface method is
actually declared and let L2 be the defining loader of D. Let T0 be the name of
the type returned by the referenced method, and let T1, ..., Tn be the names of the
argument types of the referenced method. The Java virtual machine must impose the
loading constraints TiL1 = TiL2 for i = 0 to n (§5.3.4)."
"Modified: / 23-05-2011 / 17:56:24 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'interface method resolving helpers'!
lookupInterfaceMethodIfAlreadyResolved: aJavaInterfaceMethodRef
^ nil.
"Created: / 13-04-2011 / 11:53:36 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
validateInterfaceMethodRef: aJavaInterfaceMethodRef
aJavaInterfaceMethodRef isJavaRef
ifFalse: [ self halt: 'I expected JavaRef instance as an argument' ].
aJavaInterfaceMethodRef isJavaInterfaceMethodRef
ifFalse: [ self halt: 'I expected JavaMethodRef instance as an argument' ].
"Created: / 13-04-2011 / 11:53:34 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'method resolving'!
resolveMethodIndentifiedByRef: aJavaMethodRef
| result class |
self validateMethodRef: aJavaMethodRef.
result := self lookupMethodIfAlreadyResolved: aJavaMethodRef.
result ifNotNil: [ ^ result ].
class := aJavaMethodRef classRef resolve.
class ifNil: [ self halt: 'should not happen - tell mh' ].
"
To resolve an unresolved symbolic reference from D to a method in
a class C, the symbolic reference to C given by the method reference
is first resolved (§5.4.3.1). Therefore, any exceptions that can be
thrown due to resolution of a class reference can be thrown as a result
of method resolution. If the reference to C can be successfully resolved,
exceptions relating to the resolution of the method reference itself
can be thrown.
When resolving a method reference:
Method resolution checks whether C is a class or an interface.
If C is an interface, method resolution throws an IncompatibleClassChangeError."
class isInterface ifTrue: [ self throwIncompatibleClassChangeError ].
"Method resolution attempts to look up the referenced method in C and its
superclasses:
If C declares a method with the name and descriptor specified by the method
reference, method lookup succeeds.
Otherwise, if C has a superclass, step 2 of method lookup is recursively
invoked on the direct superclass of C.
Otherwise, method lookup attempts to locate the referenced method in any of
the superinterfaces of the specified class C.
If any superinterface of C declares a method with the name and descriptor
specified by the method reference, method lookup succeeds.
Otherwise, method lookup fails.
If method lookup fails, method resolution throws a NoSuchMethodError. If method
lookup succeeds and the method is abstract, but C is not abstract, method resolution
throws an AbstractMethodError. Otherwise, if the referenced method is not accessible
(§5.4.4) to D, method resolution throws an IllegalAccessError."
result := class lookupMethodByNameAndType: aJavaMethodRef nameAndType.
result ifNil: [ self throwNoSuchMethodError ].
(result isAbstract and: [ class isAbstract not ])
ifTrue: [ self throwAbstractMethodError ].
(self
checkPermissionsForMethod: result
from: aJavaMethodRef classRef owner
to: class) ifFalse: [ self throwIllegalAccessError ].
^ result.
"Otherwise, let <E, L1> be the class or interface in which the referenced method is
actually declared and let L2 be the defining loader of D. Let T0 be the name of
the type returned by the referenced method, and let T1, ..., Tn be the names of
the argument types of the referenced method. The Java virtual machine must impose
the loading constraints TiL1=TiL2 for i = 0 to n (§5.3.4)."
"Created: / 11-04-2011 / 19:45:34 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 14-04-2011 / 00:01:34 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
resolveStaticMethodIndentifiedByRef: aJavaMethodRef
| result class |
self validateMethodRef: aJavaMethodRef.
result := self lookupMethodIfAlreadyResolved: aJavaMethodRef.
result ifNotNil: [ ^ result ].
class := aJavaMethodRef classRef resolve.
class ifNil: [ self halt: 'should not happen - tell mh' ].
"
To resolve an unresolved symbolic reference from D to a method in
a class C, the symbolic reference to C given by the method reference
is first resolved (§5.4.3.1). Therefore, any exceptions that can be
thrown due to resolution of a class reference can be thrown as a result
of method resolution. If the reference to C can be successfully resolved,
exceptions relating to the resolution of the method reference itself
can be thrown.
When resolving a method reference:
Method resolution checks whether C is a class or an interface.
If C is an interface, method resolution throws an IncompatibleClassChangeError."
class isInterface ifTrue: [ self throwIncompatibleClassChangeError ].
"Method resolution attempts to look up the referenced method in C and its
superclasses:
If C declares a method with the name and descriptor specified by the method
reference, method lookup succeeds.
Otherwise, if C has a superclass, step 2 of method lookup is recursively
invoked on the direct superclass of C.
Otherwise, method lookup attempts to locate the referenced method in any of
the superinterfaces of the specified class C.
If any superinterface of C declares a method with the name and descriptor
specified by the method reference, method lookup succeeds.
Otherwise, method lookup fails.
If method lookup fails, method resolution throws a NoSuchMethodError. If method
lookup succeeds and the method is abstract, but C is not abstract, method resolution
throws an AbstractMethodError. Otherwise, if the referenced method is not accessible
(§5.4.4) to D, method resolution throws an IllegalAccessError."
result := class lookupStaticMethodByNameAndType: aJavaMethodRef nameAndType.
result ifNil: [ self throwNoSuchMethodError ].
(result isAbstract and: [ class isAbstract not ])
ifTrue: [ self throwAbstractMethodError ].
(self
checkPermissionsForMethod: result
from: aJavaMethodRef classRef owner
to: class) ifFalse: [ self throwIllegalAccessError ].
^ result.
"Otherwise, let <E, L1> be the class or interface in which the referenced method is
actually declared and let L2 be the defining loader of D. Let T0 be the name of
the type returned by the referenced method, and let T1, ..., Tn be the names of
the argument types of the referenced method. The Java virtual machine must impose
the loading constraints TiL1=TiL2 for i = 0 to n (§5.3.4)."
"Created: / 28-04-2011 / 22:50:04 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver methodsFor:'method resolving helpers'!
checkPermissionsForMethod: aJavaMethod from: accessingJavaClass to: resolvedJavaClass
"A class or interface C is accessible to a class or interface D if
and only if either of the following conditions are true:
C is public.
C and D are members of the same runtime package (§5.3).
A field or method R is accessible to a class or interface D if and only
if any of the following conditions is true:
R is public.
R is protected and is declared in a class C, and D is either a subclass
of C or C itself.
R is either protected or package private (that is, neither public nor
protected nor private), and is declared by a class in the same runtime
package as D.
R is private and is declared in D.
This discussion of access control omits a related restriction on the target
of a protected field access or method invocation (the target must be of class
D or a subtype of D). That requirement is checked as part of the verification
process (§5.4.1); it is not part of link-time access control."
"JV@2011-05-24: Temporary hack, since access checking
is somewhat broken. Marcle should fix it :-)"
OperatingSystem getLoginName = 'jv' ifTrue:[^true].
^ self checkPermissionsForMethodOrField: aJavaMethod from: accessingJavaClass to: resolvedJavaClass.
"Created: / 11-04-2011 / 20:20:12 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 14-04-2011 / 14:20:27 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 24-05-2011 / 14:06:09 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
lookupMethodIfAlreadyResolved: aJavaMethodRef
^ nil.
"Created: / 11-04-2011 / 19:50:38 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
"Modified: / 13-04-2011 / 11:57:00 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
!
validateMethodRef: aJavaMethodRef
aJavaMethodRef isJavaRef ifFalse:[self halt: 'I expected JavaRef instance as an argument'].
aJavaMethodRef isJavaMethodRef ifFalse: [self halt: 'I expected JavaMethodRef instance as an argument'].
"Created: / 11-04-2011 / 19:47:25 / Marcel Hlopko <hlopkmar@fel.cvut.cz>"
! !
!JavaResolver class methodsFor:'documentation'!
version_SVN
^ '$Id$'
! !
JavaResolver initialize!