/**
* Check and see if this collection of permissions implies the permissions expressed in
* "permission".
*
* @param p the Permission object to compare
* @return true if "permission" is a proper subset of a permission in the collection, false if
* not.
*/
public boolean implies(Permission permission) {
if (!(permission instanceof ServicePermission)) return false;
ServicePermission np = (ServicePermission) permission;
int desired = np.getMask();
int effective = 0;
int needed = desired;
synchronized (this) {
int len = perms.size();
// need to deal with the case where the needed permission has
// more than one action and the collection has individual permissions
// that sum up to the needed.
for (int i = 0; i < len; i++) {
ServicePermission x = (ServicePermission) perms.get(i);
// System.out.println(" trying "+x);
if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) {
effective |= x.getMask();
if ((effective & desired) == desired) return true;
needed = (desired ^ effective);
}
}
}
return false;
}
