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Showing content from https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/security/BasicPermission.html below:

BasicPermission (Java SE 21 & JDK 21)

All Implemented Interfaces:

Serializable, Guard

Direct Known Subclasses:

AttachPermission, AudioPermission, AuthPermission, AWTPermission, DelegationPermission, FlightRecorderPermission, InquireSecContextPermission, JDIPermission, LinkPermission, LoggingPermission, ManagementPermission, MBeanServerPermission, MBeanTrustPermission, NetPermission, NetworkPermission, PropertyPermission, ReflectPermission, RuntimePermission, SecurityPermission, SerializablePermission, SQLPermission, SSLPermission, SubjectDelegationPermission

The

class extends the

class, and can be used as the base class for permissions that want to follow the same naming convention as

.

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.*" signify a wildcard match, while "*java", "a*b", and "java*" do not.

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.

Since:

1.2

See Also:

• Permission
• Permissions
• PermissionCollection
• SecurityManager
• Serialized Form

• Constructor Summary

  Constructors

  Creates a new BasicPermission with the specified name.

  Creates a new BasicPermission object with the specified name.

• Method Summary

  boolean

  Checks two BasicPermission objects for equality.

  Returns the canonical string representation of the actions, which currently is the empty string "", since there are no actions for a BasicPermission.

  int

  Returns the hash code value for this object.

  boolean

  Checks if the specified permission is "implied" by this object.

  Returns a new PermissionCollection object for storing BasicPermission objects.

• Constructor Details
  • BasicPermission 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.

    Parameters:

    name - the name of the BasicPermission.

    Throws:

    NullPointerException - if name is null.

    IllegalArgumentException - if name is empty.

  • BasicPermission

    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.

    Parameters:

    name - the name of the BasicPermission.

    actions - ignored.

    Throws:

    NullPointerException - if name is null.

    IllegalArgumentException - if name is empty.

• Method Details
  • implies

    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".

    Specified by:

    implies in class Permission

    Parameters:

    p - the permission to check against.

    Returns:

    true if the passed permission is equal to or implied by this permission, false otherwise.

  • equals public boolean equals(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.

    Specified by:

    equals in class Permission

    Parameters:

    obj - the object we are testing for equality with this object.

    Returns:

    true if obj's class is the same as this object's class and has the same name as this BasicPermission object, false otherwise.

    See Also:

    • Object.hashCode()
    • HashMap

  • hashCode

    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.

    Specified by:

    hashCode in class Permission

    Returns:

    a hash code value for this object.

    See Also:

    • Object.equals(java.lang.Object)
    • System.identityHashCode(java.lang.Object)

  • getActions

    Returns the canonical string representation of the actions, which currently is the empty string "", since there are no actions for a BasicPermission.

    Specified by:

    getActions in class Permission

    Returns:

    the empty string "".

  • newPermissionCollection

    Returns a new

    PermissionCollection

    object for storing

    BasicPermission

    objects.

    BasicPermission objects must be stored in a manner that allows them to be inserted in any order, but that also enables the PermissionCollection.implies(java.security.Permission) method to be implemented in an efficient (and consistent) manner.

    Overrides:

    newPermissionCollection in class Permission

    Returns:

    a new PermissionCollection object suitable for storing BasicPermission objects.

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