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JavaTM 2 Platform Std. Ed. v1.3 |
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java.lang.Object | +--java.lang.reflect.AccessibleObject
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.
Field,
Method,
Constructor,
ReflectPermission| Constructor Summary | |
protected |
AccessibleObject()
Constructor: only used by the Java Virtual Machine. |
| Method Summary | |
boolean |
isAccessible()
Get the value of the accessible flag for this object. |
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). |
void |
setAccessible(boolean flag)
Set the accessible flag for this object to the indicated boolean value. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
protected AccessibleObject()
| Method Detail |
public static void setAccessible(AccessibleObject[] array,
boolean flag)
throws SecurityException
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 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.
array - the array of AccessibleObjectsflag - the new value for the accessible flag
in each objectSecurityException - if the request is denied.SecurityManager.checkPermission(java.security.Permission),
RuntimePermission
public void setAccessible(boolean flag)
throws SecurityException
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 Class).
A SecurityException is raised if this object is a Constructor object for the class
java.lang.Class, and flag is true.
flag - the new value for the accessible flagSecurityException - if the request is denied.SecurityManager.checkPermission(java.security.Permission),
RuntimePermissionpublic boolean isAccessible()
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JavaTM 2 Platform Std. Ed. v1.3 |
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