BasicPermissionpublic abstract class BasicPermission extends Permission implements Serializable| The BasicPermission class extends the Permission class, and
can be used as the base class for permissions that want to
follow the same naming convention as BasicPermission.
The name for a BasicPermission is the name of the given permission
(for example, "exit",
"setFactory", "print.queueJob", etc). The naming
convention follows the hierarchical property naming convention.
An asterisk may appear by itself, or if immediately preceded by a "."
may appear at the end of the name, to signify a wildcard match.
For example, "*" and "java.*" are valid, while "*java", "a*b",
and "java*" are not valid.
The action string (inherited from Permission) is unused.
Thus, BasicPermission is commonly used as the base class for
"named" permissions
(ones that contain a name but no actions list; you either have the
named permission or you don't.)
Subclasses may implement actions on top of BasicPermission,
if desired.
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| Fields Summary |
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| private static final long | serialVersionUID | | private transient boolean | wildcard | | private transient String | path |
| Constructors Summary |
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public BasicPermission(String name)Creates a new BasicPermission with the specified name.
Name is the symbolic name of the permission, such as
"setFactory",
"print.queueJob", or "topLevelWindow", etc.
super(name);
init(name);
| public BasicPermission(String name, String actions)Creates a new BasicPermission object with the specified name.
The name is the symbolic name of the BasicPermission, and the
actions String is currently unused.
super(name);
init(name);
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| Methods Summary |
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| public boolean | equals(java.lang.Object obj)Checks two BasicPermission objects for equality.
Checks that obj's class is the same as this object's class
and has the same name as this object.
if (obj == this)
return true;
if ((obj == null) || (obj.getClass() != getClass()))
return false;
BasicPermission bp = (BasicPermission) obj;
return getName().equals(bp.getName());
| | public java.lang.String | getActions()Returns the canonical string representation of the actions,
which currently is the empty string "", since there are no actions for
a BasicPermission.
return "";
| | public int | hashCode()Returns the hash code value for this object.
The hash code used is the hash code of the name, that is,
getName().hashCode(), where getName is
from the Permission superclass.
return this.getName().hashCode();
| | public boolean | implies(java.security.Permission p)Checks if the specified permission is "implied" by
this object.
More specifically, this method returns true if:
- p's class is the same as this object's class, and
- p's name equals or (in the case of wildcards)
is implied by this object's
name. For example, "a.b.*" implies "a.b.c".
if ((p == null) || (p.getClass() != getClass()))
return false;
BasicPermission that = (BasicPermission) p;
if (this.wildcard) {
if (that.wildcard)
// one wildcard can imply another
return that.path.startsWith(path);
else
// make sure ap.path is longer so a.b.* doesn't imply a.b
return (that.path.length() > this.path.length()) &&
that.path.startsWith(this.path);
} else {
if (that.wildcard) {
// a non-wildcard can't imply a wildcard
return false;
}
else {
return this.path.equals(that.path);
}
}
| | private void | init(java.lang.String name)initialize a BasicPermission object. Common to all constructors.
if (name == null)
throw new NullPointerException("name can't be null");
int len = name.length();
if (len == 0) {
throw new IllegalArgumentException("name can't be empty");
}
char last = name.charAt(len - 1);
// Is wildcard or ends with ".*"?
if (last == '*" && (len == 1 || name.charAt(len - 2) == '.")) {
wildcard = true;
if (len == 1) {
path = "";
} else {
path = name.substring(0, len - 1);
}
} else {
path = name;
}
| | public java.security.PermissionCollection | newPermissionCollection()Returns a new PermissionCollection object for storing BasicPermission
objects.
A BasicPermissionCollection stores a collection of
BasicPermission permissions.
BasicPermission objects must be stored in a manner that allows them
to be inserted in any order, but that also enables the
PermissionCollection implies method
to be implemented in an efficient (and consistent) manner.
return new BasicPermissionCollection();
| | private void | readObject(java.io.ObjectInputStream s)readObject is called to restore the state of the BasicPermission from
a stream.
s.defaultReadObject();
// init is called to initialize the rest of the values.
init(getName());
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