Class UnixNumericGroupPrincipal

java.lang.Object

com.sun.security.auth.UnixNumericGroupPrincipal

All Implemented Interfaces:: Serializable, Principal

public class UnixNumericGroupPrincipal extends Object implements Principal, Serializable

This class implements the Principal interface and represents a user's Unix group identification number (GID).

Principals such as this UnixNumericGroupPrincipal may be associated with a particular Subject to augment that Subject with an additional identity. Refer to the Subject class for more information on how to achieve this. Authorization decisions can then be based upon the Principals associated with a Subject.

Since:

1.4

See Also:

Constructor Summary

Constructor	Description
`UnixNumericGroupPrincipal(long name, boolean primaryGroup)`	Create a `UnixNumericGroupPrincipal` using a long representation of the user's group identification number (GID).
`UnixNumericGroupPrincipal(String name, boolean primaryGroup)`	Create a `UnixNumericGroupPrincipal` using a `String` representation of the user's group identification number (GID).

Method Summary

Modifier and Type	Method	Description
`boolean`	`equals(Object o)`	Compares the specified Object with this `UnixNumericGroupPrincipal` for equality.
`String`	`getName()`	Return the user's group identification number (GID) for this `UnixNumericGroupPrincipal`.
`int`	`hashCode()`	Return a hash code for this `UnixNumericGroupPrincipal`.
`boolean`	`isPrimaryGroup()`	Return whether this group identification number (GID) represents the primary group to which this user belongs.
`long`	`longValue()`	Return the user's group identification number (GID) for this `UnixNumericGroupPrincipal` as a long.
`String`	`toString()`	Return a string representation of this `UnixNumericGroupPrincipal`.

Methods declared in class Object

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

Methods declared in interface Principal

implies

Constructor Details

UnixNumericGroupPrincipal

public UnixNumericGroupPrincipal(String name, boolean primaryGroup)

Create a UnixNumericGroupPrincipal using a String representation of the user's group identification number (GID).

Parameters:: name - the user's group identification number (GID) for this user.; primaryGroup - true if the specified GID represents the primary group to which this user belongs.
Throws:: NullPointerException - if the name is null.

UnixNumericGroupPrincipal

public UnixNumericGroupPrincipal(long name, boolean primaryGroup)

Create a UnixNumericGroupPrincipal using a long representation of the user's group identification number (GID).

Parameters:: name - the user's group identification number (GID) for this user represented as a long.; primaryGroup - true if the specified GID represents the primary group to which this user belongs.

Method Details

getName

public String getName()

Return the user's group identification number (GID) for this UnixNumericGroupPrincipal.

Specified by:: getName in interface Principal
Returns:: the user's group identification number (GID) for this UnixNumericGroupPrincipal

longValue

public long longValue()

Return the user's group identification number (GID) for this UnixNumericGroupPrincipal as a long.

Returns:: the user's group identification number (GID) for this UnixNumericGroupPrincipal as a long.

isPrimaryGroup

public boolean isPrimaryGroup()

Return whether this group identification number (GID) represents the primary group to which this user belongs.

Returns:: true if this group identification number (GID) represents the primary group to which this user belongs, or false otherwise.

toString

public String toString()

Return a string representation of this UnixNumericGroupPrincipal.

Specified by:: toString in interface Principal
Overrides:: toString in class Object
Returns:: a string representation of this UnixNumericGroupPrincipal.

equals

public boolean equals(Object o)

Compares the specified Object with this UnixNumericGroupPrincipal for equality. Returns true if the given object is also a UnixNumericGroupPrincipal and the two UnixNumericGroupPrincipals have the same group identification number (GID).

Specified by:

equals in interface Principal

Overrides:

equals in class Object

Parameters:

o - Object to be compared for equality with this UnixNumericGroupPrincipal.

Returns:

true if the specified Object is equal to this UnixNumericGroupPrincipal.

See Also:

hashCode

public int hashCode()

Return a hash code for this UnixNumericGroupPrincipal.

Specified by:

hashCode in interface Principal

Overrides:

hashCode in class Object

Returns:

a hash code for this UnixNumericGroupPrincipal.

See Also:

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/25/docs/api/jdk.security.auth/com/sun/security/auth/UnixNumericGroupPrincipal.html