| java.lang.Object
 java.lang.reflect.AccessibleObject
All known Subclasses: java.lang.reflect.Field, java.lang.reflect.Constructor, java.lang.reflect.Method,
| AccessibleObject | | public class AccessibleObject (Code) | | The AccessibleObject class is the base class for Field, Method and
Constructor objects. It provides the ability to flag a reflected
object as suppressing default Java language access control checks
when it is used. The access checks--for public, default (package)
access, protected, and private members--are performed when Fields,
Methods or Constructors are used to set or get fields, to invoke
methods, or to create and initialize new instances of classes,
respectively.
Setting the accessible flag in a reflected object
permits sophisticated applications with sufficient privilege, such
as Java Object Serialization or other persistence mechanisms, to
manipulate objects in a manner that would normally be prohibited.
See Also: Field
See Also: Method
See Also: Constructor
See Also: ReflectPermission
since:
1.2 |
| Constructor Summary | |
| protected | AccessibleObject()
Constructor: only used by the Java Virtual Machine. |
| Method Summary | |
| public boolean | isAccessible()
Get the value of the accessible flag for this object. | | public static void | setAccessible(AccessibleObject[] array, boolean flag)
Convenience method to set the accessible flag for an
array of objects with a single security check (for efficiency).
First, if there is a security manager, its
checkPermission method is called with a
ReflectPermission("suppressAccessChecks") permission.
A SecurityException is raised if flag is
true but accessibility of any of the elements of the input
array may not be changed (for example, if the element
object is a
Constructor object for the class
java.lang.Class ). | | public void | setAccessible(boolean flag)
Set the accessible flag for this object to
the indicated boolean value. |
| AccessibleObject | | protected AccessibleObject()(Code) | | Constructor: only used by the Java Virtual Machine.
|
| isAccessible | | public boolean isAccessible()(Code) | | Get the value of the accessible flag for this object.
the value of the object's accessible flag |
| setAccessible | | public static void setAccessible(AccessibleObject[] array, boolean flag) throws SecurityException(Code) | | Convenience method to set the accessible flag for an
array of objects with a single security check (for efficiency).
First, if there is a security manager, its
checkPermission method is called with a
ReflectPermission("suppressAccessChecks") permission.
A SecurityException is raised if flag is
true but accessibility of any of the elements of the input
array may not be changed (for example, if the element
object is a
Constructor object for the class
java.lang.Class ). In the event of such a SecurityException, the
accessiblity of objects is set to flag for array elements
upto (and excluding) the element for which the exception occurred; the
accessiblity of elements beyond (and including) the element for which
the exception occurred is unchanged.
Parameters:
array - the array of AccessibleObjects
Parameters:
flag - the new value for the accessible flagin each object
throws:
SecurityException - if the request is denied.
See Also: SecurityManager.checkPermission
See Also: java.lang.RuntimePermission |
| setAccessible | | public void setAccessible(boolean flag) throws SecurityException(Code) | | Set the accessible flag for this object to
the indicated boolean value. A value of true indicates that
the reflected object should suppress Java language access
checking when it is used. A value of false indicates
that the reflected object should enforce Java language access checks.
First, if there is a security manager, its
checkPermission method is called with a
ReflectPermission("suppressAccessChecks") permission.
A SecurityException is raised if flag is
true but accessibility of this object may not be changed
(for example, if this element object is a
Constructor object for
the class
java.lang.Class ).
A SecurityException is raised if this object is a
java.lang.reflect.Constructor object for the class
java.lang.Class, and flag is true.
Parameters:
flag - the new value for the accessible flag
throws:
SecurityException - if the request is denied.
See Also: SecurityManager.checkPermission
See Also: java.lang.RuntimePermission |
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