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JavaTM 2 Platform Std. Ed. v1.3.1 |
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java.security.acl
Interface Group
- All Superinterfaces:
- Principal
- public interface Group
- extends Principal
This interface is used to represent a group of principals. (A principal represents an entity such as an individual user or a company).
Note that Group extends Principal. Thus, either a Principal or a Group can
be passed as an argument to methods containing a Principal parameter. For
example, you can add either a Principal or a Group to a Group object by
calling the object's addMember method, passing it the
Principal or Group.
| Method Summary | |
boolean |
addMember(Principal user)
Adds the specified member to the group. |
boolean |
isMember(Principal member)
Returns true if the passed principal is a member of the group. |
Enumeration |
members()
Returns an enumeration of the members in the group. |
boolean |
removeMember(Principal user)
Removes the specified member from the group. |
| Methods inherited from interface java.security.Principal |
equals, getName, hashCode, toString |
| Method Detail |
addMember
public boolean addMember(Principal user)
- Adds the specified member to the group.
- Parameters:
user- the principal to add to this group.- Returns:
- true if the member was successfully added, false if the principal was already a member.
removeMember
public boolean removeMember(Principal user)
- Removes the specified member from the group.
- Parameters:
user- the principal to remove from this group.- Returns:
- true if the principal was removed, or false if the principal was not a member.
isMember
public boolean isMember(Principal member)
- Returns true if the passed principal is a member of the group.
This method does a recursive search, so if a principal belongs to a
group which is a member of this group, true is returned.
- Parameters:
member- the principal whose membership is to be checked.- Returns:
- true if the principal is a member of this group, false otherwise.
members
public Enumeration members()
- Returns an enumeration of the members in the group.
The returned objects can be instances of either Principal
or Group (which is a subclass of Principal).
- Returns:
- an enumeration of the group members.
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JavaTM 2 Platform Std. Ed. v1.3.1 |
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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