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26 package java.security;
30 * A computation to be performed with privileges enabled, that throws one or
31 * more checked exceptions. The computation is performed by invoking
32 * <code>AccessController.doPrivileged</code> on the
33 * <code>PrivilegedExceptionAction</code> object. This interface is
34 * used only for computations that throw checked exceptions;
35 * computations that do not throw
36 * checked exceptions should use <code>PrivilegedAction</code> instead.
38 * @see AccessController
39 * @see AccessController#doPrivileged(PrivilegedExceptionAction)
40 * @see AccessController#doPrivileged(PrivilegedExceptionAction,
41 * AccessControlContext)
42 * @see PrivilegedAction
45 public interface PrivilegedExceptionAction<T> {
47 * Performs the computation. This method will be called by
48 * <code>AccessController.doPrivileged</code> after enabling privileges.
50 * @return a class-dependent value that may represent the results of the
51 * computation. Each class that implements
52 * <code>PrivilegedExceptionAction</code> should document what
53 * (if anything) this value represents.
54 * @throws Exception an exceptional condition has occurred. Each class
55 * that implements <code>PrivilegedExceptionAction</code> should
56 * document the exceptions that its run method can throw.
57 * @see AccessController#doPrivileged(PrivilegedExceptionAction)
58 * @see AccessController#doPrivileged(PrivilegedExceptionAction,AccessControlContext)
61 T run() throws Exception;