java.lang.reflect.AccessibleObject

AccessibleObject

Java SE 6

Extended by: Constructor, Field, Method

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.

since 1.2

See also java.lang.reflect.Field, java.lang.reflect.Method, java.lang.reflect.Constructor, java.lang.reflect.ReflectPermission

Constructors

protected

AccessibleObject()
Constructor: only used by the Java Virtual Machine.

Properties

public static void

setAccessible(AccessibleObject[] array, boolean flag) throws SecurityException
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 accessibility of objects is set to flag for array elements upto (and excluding) the element for which the exception occurred; the accessibility of elements beyond (and including) the element for which the exception occurred is unchanged.

array the array of AccessibleObjects

flag the new value for the accessible flag in each object

Throws SecurityException: if the request is denied.

See also checkPermission, java.lang.RuntimePermission

public void

setAccessible(boolean flag) throws SecurityException
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.

flag the new value for the accessible flag

Throws SecurityException: if the request is denied.

See also checkPermission, java.lang.RuntimePermission