210 * Initialize a ExecPermission object. Common to all constructors.
211 * Also called during de-serialization.
212 */
213 private void init(String path) {
214 this.fp = new FilePermission(path, "execute");
215 }
216
217 /**
218 * A ExecPermissionCollection stores a collection
219 * of ExecPermission permissions. ExecPermission objects
220 * must be stored in a manner that allows them to be inserted in any
221 * order, but enable the implies function to evaluate the implies
222 * method in an efficient (and consistent) manner.
223 *
224 * @serial include
225 */
226 private static class ExecPermissionCollection
227 extends PermissionCollection
228 implements java.io.Serializable
229 {
230 private Vector permissions;
231
232 private static final long serialVersionUID = -3352558508888368273L;
233
234 /**
235 * Create an empty ExecPermissionCollection.
236 */
237 public ExecPermissionCollection() {
238 permissions = new Vector();
239 }
240
241 /**
242 * Adds a permission to the collection.
243 *
244 * @param permission the Permission object to add.
245 *
246 * @exception IllegalArgumentException - if the permission is not a
247 * ExecPermission
248 *
249 * @exception SecurityException - if this ExecPermissionCollection
250 * object has been marked readonly
251 */
252 public void add(Permission permission)
253 {
254 if (! (permission instanceof ExecPermission))
255 throw new IllegalArgumentException("invalid permission: "+
256 permission);
257 if (isReadOnly())
258 throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection");
259
260 permissions.addElement(permission);
261 }
262
263 /**
264 * Check and see if this set of permissions implies the permissions
265 * expressed in "permission".
266 *
267 * @param p the Permission object to compare
268 *
269 * @return true if "permission" is a proper subset of a permission in
270 * the set, false if not.
271 */
272 public boolean implies(Permission permission)
273 {
274 if (! (permission instanceof ExecPermission))
275 return false;
276
277 Enumeration e = permissions.elements();
278
279 while (e.hasMoreElements()) {
280 ExecPermission x = (ExecPermission) e.nextElement();
281 if (x.implies(permission)) {
282 return true;
283 }
284 }
285 return false;
286 }
287
288 /**
289 * Returns an enumeration of all the ExecPermission objects in the
290 * container.
291 *
292 * @return an enumeration of all the ExecPermission objects.
293 */
294 public Enumeration elements()
295 {
296 return permissions.elements();
297 }
298 }
299 }
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210 * Initialize a ExecPermission object. Common to all constructors.
211 * Also called during de-serialization.
212 */
213 private void init(String path) {
214 this.fp = new FilePermission(path, "execute");
215 }
216
217 /**
218 * A ExecPermissionCollection stores a collection
219 * of ExecPermission permissions. ExecPermission objects
220 * must be stored in a manner that allows them to be inserted in any
221 * order, but enable the implies function to evaluate the implies
222 * method in an efficient (and consistent) manner.
223 *
224 * @serial include
225 */
226 private static class ExecPermissionCollection
227 extends PermissionCollection
228 implements java.io.Serializable
229 {
230 private Vector<Permission> permissions;
231
232 private static final long serialVersionUID = -3352558508888368273L;
233
234 /**
235 * Create an empty ExecPermissionCollection.
236 */
237 public ExecPermissionCollection() {
238 permissions = new Vector<Permission>();
239 }
240
241 /**
242 * Adds a permission to the collection.
243 *
244 * @param permission the Permission object to add.
245 *
246 * @exception IllegalArgumentException - if the permission is not a
247 * ExecPermission
248 *
249 * @exception SecurityException - if this ExecPermissionCollection
250 * object has been marked readonly
251 */
252 public void add(Permission permission)
253 {
254 if (! (permission instanceof ExecPermission))
255 throw new IllegalArgumentException("invalid permission: "+
256 permission);
257 if (isReadOnly())
258 throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection");
259
260 permissions.addElement(permission);
261 }
262
263 /**
264 * Check and see if this set of permissions implies the permissions
265 * expressed in "permission".
266 *
267 * @param p the Permission object to compare
268 *
269 * @return true if "permission" is a proper subset of a permission in
270 * the set, false if not.
271 */
272 public boolean implies(Permission permission)
273 {
274 if (! (permission instanceof ExecPermission))
275 return false;
276
277 Enumeration<Permission> e = permissions.elements();
278
279 while (e.hasMoreElements()) {
280 ExecPermission x = (ExecPermission)e.nextElement();
281 if (x.implies(permission)) {
282 return true;
283 }
284 }
285 return false;
286 }
287
288 /**
289 * Returns an enumeration of all the ExecPermission objects in the
290 * container.
291 *
292 * @return an enumeration of all the ExecPermission objects.
293 */
294 public Enumeration<Permission> elements()
295 {
296 return permissions.elements();
297 }
298 }
299 }
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