javax.management

## Class MBeanServerPermission

- java.lang.Object
- - java.security.Permission
  - - java.security.BasicPermission
    - - javax.management.MBeanServerPermission

- All Implemented Interfaces:
    Serializable, Guard

      public class MBeanServerPermission
      extends BasicPermission

  A Permission to perform actions related to MBeanServers. The name of the permission specifies the operation requested or granted by the permission. For a granted permission, it can be `*` to allow all of the MBeanServer operations specified below. Otherwise, for a granted or requested permission, it must be one of the following:
  createMBeanServer
    Create a new MBeanServer object using the method `MBeanServerFactory.createMBeanServer()` or `MBeanServerFactory.createMBeanServer(java.lang.String)`.
  findMBeanServer
    Find an MBeanServer with a given name, or all MBeanServers in this JVM, using the method `MBeanServerFactory.findMBeanServer(java.lang.String)`.
  newMBeanServer
    Create a new MBeanServer object without keeping a reference to it, using the method `MBeanServerFactory.newMBeanServer()` or `MBeanServerFactory.newMBeanServer(java.lang.String)`.
  releaseMBeanServer
    Remove the MBeanServerFactory's reference to an MBeanServer, using the method `MBeanServerFactory.releaseMBeanServer(javax.management.MBeanServer)`.
  The name of the permission can also denote a list of one or more comma-separated operations. Spaces are allowed at the beginning and end of the name and before and after commas.

  `MBeanServerPermission("createMBeanServer")` implies `MBeanServerPermission("newMBeanServer")`.

  Since:
    1.5
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `MBeanServerPermission(String name)` Create a new MBeanServerPermission with the given name.
    `MBeanServerPermission(String name, String actions)` Create a new MBeanServerPermission with the given name.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)` Checks two MBeanServerPermission objects for equality.
    `int` | `hashCode()` Returns the hash code value for this object.
    `boolean` | `implies(Permission p)` Checks if this MBeanServerPermission object "implies" the specified permission.
    `PermissionCollection` | `newPermissionCollection()` Returns a new PermissionCollection object for storing BasicPermission objects.

    - ### Methods inherited from class java.security.BasicPermission

      `getActions`

    - ### Methods inherited from class java.security.Permission

      `checkGuard, getName, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### MBeanServerPermission

          public MBeanServerPermission(String name)

      Create a new MBeanServerPermission with the given name.

      This constructor is equivalent to `MBeanServerPermission(name,null)`.

      Parameters:
        `name` - the name of the granted permission. It must respect the constraints spelt out in the description of the `MBeanServerPermission` class.
      Throws:
        `NullPointerException` - if the name is null.
        `IllegalArgumentException` - if the name is not `*` or one of the allowed names or a comma-separated list of the allowed names.

    - #### MBeanServerPermission

          public MBeanServerPermission(String name,
                               String actions)

      Create a new MBeanServerPermission with the given name.

      Parameters:
        `name` - the name of the granted permission. It must respect the constraints spelt out in the description of the `MBeanServerPermission` class.
        `actions` - the associated actions. This parameter is not currently used and must be null or the empty string.
      Throws:
        `NullPointerException` - if the name is null.
        `IllegalArgumentException` - if the name is not `*` or one of the allowed names or a comma-separated list of the allowed names, or if `actions` is a non-null non-empty string.
        `NullPointerException` - if `name` is `null`.
        `IllegalArgumentException` - if `name` is empty or if arguments are invalid.

  - ### Method Detail

    - #### hashCode

          public int hashCode()

      Description copied from class: `BasicPermission`
      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.
      Overrides:
        `hashCode` in class `BasicPermission`
      Returns:
        a hash code value for this object.
      See Also:
        `Object.equals(java.lang.Object)`, `Hashtable`

    - #### implies

          public boolean implies(Permission p)

      Checks if this MBeanServerPermission object "implies" the specified permission.

      More specifically, this method returns true if:

      - p is an instance of MBeanServerPermission,
      - p's target names are a subset of this object's target names

      The `createMBeanServer` permission implies the `newMBeanServer` permission.

      Overrides:
        `implies` in class `BasicPermission`
      Parameters:
        `p` - the permission to check against.
      Returns:
        true if the specified permission is implied by this object, false if not.

    - #### equals

          public boolean equals(Object obj)

      Checks two MBeanServerPermission objects for equality. Checks that obj is an MBeanServerPermission, and represents the same list of allowable actions as this object.

      Overrides:
        `equals` in class `BasicPermission`
      Parameters:
        `obj` - the object we are testing for equality with this object.
      Returns:
        true if the objects are equal.
      See Also:
        `Object.hashCode()`, `Hashtable`

    - #### newPermissionCollection

          public PermissionCollection newPermissionCollection()

      Description copied from class: `BasicPermission`
      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` method to be implemented in an efficient (and consistent) manner.

      Overrides:
        `newPermissionCollection` in class `BasicPermission`
      Returns:
        a new PermissionCollection object suitable for storing BasicPermissions.

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