javax.microedition.io
Class CommProtocolPermission

java.lang.Object
  java.security.Permission
      javax.microedition.io.GCFPermission
          javax.microedition.io.CommProtocolPermission

public final class CommProtocolPermission

extends GCFPermission

This class represents access rights to connections via the "comm" protocol. A CommProtocolPermission consists of a URI string but no actions list.

The URI string specifies a logical serial port connection and optional parameters. It takes the following general form:

 comm:{port identifier}[{optional parameters}]
 

The detailed syntax for the CommProtocolPermission URI is provided by this BNF. In addition, an asterisk may terminate the URI string within the {port identifier} field to indicate a wildcard match of 0 or more characters. Valid examples include "comm:*" and "comm:port*".

See Also:

Connector.open(java.lang.String), "javax.microedition.io.CommConnection" in MIDP 3.0 Specification

Constructor Summary

CommProtocolPermission(String uri)
Creates a new CommProtocolPermission with the specified URI as its name.

Method Summary

boolean	equals(Object obj) Checks two CommProtocolPermission objects for equality.
String	getActions() Returns the canonical string representation of the actions, which currently is the empty string "", since there are no actions defined for CommProtocolPermission.
int	hashCode() Returns the hash code value for this object.
boolean	implies(Permission p) Checks if this CommProtocolPermission object "implies" the specified permission.
PermissionCollection	newPermissionCollection() Returns a new PermissionCollection for storing CommProtocolPermission objects.

Methods inherited from class javax.microedition.io.GCFPermission

getProtocol, getURI

Methods inherited from class java.security.Permission

getName, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CommProtocolPermission

public CommProtocolPermission(String uri)

Creates a new CommProtocolPermission with the specified URI as its name. The URI string must conform to the specification given above, and is normalized to facilitate subsequent comparisons.

Parameters:

uri - the URI string.

Throws:

IllegalArgumentException - if uri is malformed.

NullPointerException - if uri is null.

See Also:

Permission.getName()

Method Detail

implies

public boolean implies(Permission p)

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

More specifically, this method returns true if all of the following are true:

• p is an instanceof CommProtocolPermission

• p's {port identifier} string equals or is implied by this object's {port identifier} string. For example:
  • "comm:port*" implies "comm:port1"
  • "comm:port1" implies "comm:port2" if both port identifiers are mapped to the same logical port.

• for each of the parameters permitted in the {optional parameters} string, either:
  • the parameter value for this object and for p are identical, or
  • this object does not define a value for the parameter.
  For example:
  • "comm:port1;baudrate=300;autorts=on" implies "comm:port1;autorts=on;baudrate=300"
  • "comm:port*" implies "comm:port1;baudrate=300"

  Specified by:

  implies in class Permission

  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 CommProtocolPermission objects for equality.

Specified by:

equals in class Permission

Parameters:

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

Returns:

true if obj is a CommProtocolPermission and has the same URI string as this CommProtocolPermission object.

hashCode

public int hashCode()

Returns the hash code value for this object.

Specified by:

hashCode in class Permission

Returns:

a hash code value for this object.

getActions

public String getActions()

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

Specified by:

getActions in class Permission

Returns:

the empty string "".

newPermissionCollection

public PermissionCollection newPermissionCollection()

Returns a new PermissionCollection for storing CommProtocolPermission objects.

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

Overrides:

newPermissionCollection in class Permission

Returns:

a new PermissionCollection suitable for storing CommProtocolPermission objects.