Module java.base

Package java.security

Interface Principal

All Known Subinterfaces:

GroupPrincipal, UserPrincipal

All Known Implementing Classes:

Identity, IdentityScope, JMXPrincipal, KerberosPrincipal, Signer, X500Principal

public interface Principal

This interface represents the abstract notion of a Principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.

Since:

1.1

See Also:

• X509Certificate

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object another)	Compares this Principal to the specified object.
String	getName()	Returns the name of this Principal.
int	hashCode()	Returns a hashcode for this Principal.
default boolean	implies(Subject subject)	Returns true if the specified subject is implied by this Principal.
String	toString()	Returns a string representation of this Principal.

Method Details

equals

boolean equals(Object another)

Compares this Principal to the specified object. Returns true if the object passed in matches the Principal represented by the implementation of this interface.

Overrides:

equals in class Object

Parameters:

another - Principal to compare with.

Returns:

true if the Principal passed in is the same as that encapsulated by this Principal, and false otherwise.

See Also:

• Object.hashCode()
• HashMap

toString

String toString()

Returns a string representation of this Principal.

Overrides:

toString in class Object

Returns:

a string representation of this Principal.

hashCode

int hashCode()

Returns a hashcode for this Principal.

Overrides:

hashCode in class Object

Returns:

a hashcode for this Principal

See Also:

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

getName

String getName()

Returns the name of this Principal.

Returns:

the name of this Principal.

implies

default boolean implies(Subject subject)

Returns true if the specified subject is implied by this Principal.

Implementation Requirements:

The default implementation of this method returns true if subject is non-null and contains at least one Principal that is equal to this Principal.

Subclasses may override this with a different implementation, if necessary.

Parameters:

subject - the Subject

Returns:

true if subject is non-null and is implied by this Principal, or false otherwise.

Since:

1.8