Group (Java Platform SE 6) (original) (raw)
java.security.acl
Interface Group
All Superinterfaces:
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<? extends Principal> | 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
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
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
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
Enumeration<? extends Principal> 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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For further API reference and developer documentation, see Java 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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