Group (Apache JSPWiki 2.11.0.M6 API)

java.lang.Object
- org.apache.wiki.auth.authorize.Group

```
public class Group
extends Object
```
Groups are a specialized type of ad-hoc role used by the wiki system. Unlike externally-provided roles (such as those provided by an LDAP server or web container), JSPWiki groups can be created dynamically by wiki users, without requiring special container privileges or administrator intervention. They are designed to provide a lightweight role-based access control system that complements existing role systems.

Group names are case-insensitive, and have a few naming restrictions, which are enforced by the GroupManager:
- Groups cannot have the same name as a built-in Role (e.g., "Admin", "Authenticated" etc.)
- Groups cannot have the same name as an existing user
Note: prior to JSPWiki 2.4.19, Group was an interface; it is now a concrete, final class.

Groups are related to GroupPrincipals. A GroupPrincipal, when injected into the Principal set of a WikiSession's Subject, means that the user is a member of a Group of the same name -- it is, in essence, an "authorization token." GroupPrincipals, unlike Groups, are thread-safe, lightweight and immutable. That's why we use them in Subjects rather than the Groups themselves.
Since:

2.3

Constructor Summary

Constructors
Modifier Constructor and Description

protected Group(String name, String wiki)
Protected constructor to prevent direct instantiation except by other package members.

Constructors
Modifier	Constructor and Description
`protected`	`Group(String name, String wiki)` Protected constructor to prevent direct instantiation except by other package members.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(Principal user)` Adds a Principal to the group.
`void`	`clear()` Clears all Principals from the group list.
`boolean`	`equals(Object o)` Two DefaultGroups are equal if they contain identical member Principals and have the same name.
`Date`	`getCreated()` Returns the creation date.
`String`	`getCreator()` Returns the creator of this Group.
`Date`	`getLastModified()` Returns the last-modified date.
`String`	`getModifier()` Returns the name of the user who last modified this group.
`String`	`getName()` The name of the group.
`Principal`	`getPrincipal()` Returns the GroupPrincipal that represents this Group.
`String`	`getWiki()` Returns the wiki name.
`int`	`hashCode()` The hashcode is calculated as a XOR sum over all members of the Group.
`boolean`	`isMember(Principal principal)` Returns `true` if a Principal is a member of the group.
`Principal[]`	`members()` Returns the members of the group as an array of Principal objects.
`boolean`	`remove(Principal user)` Removes a Principal from the group.
`void`	`setCreated(Date date)` Sets the created date.
`void`	`setCreator(String creator)` Sets the creator of this Group.
`void`	`setLastModified(Date date)` Sets the last-modified date
`void`	`setModifier(String modifier)` Sets the name of the user who last modified this group.
`String`	`toString()` Returns a string representation of the Group.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Group
```
protected Group(String name,
                String wiki)
```
    Protected constructor to prevent direct instantiation except by other package members. Callers should use GroupManager.parseGroup(String, String, boolean) or GroupManager.parseGroup(org.apache.wiki.WikiContext, boolean). instead.
    
    Parameters:
    
    name - the name of the group
    
    wiki - the wiki the group belongs to
- Method Detail
  - add
```
public boolean add(Principal user)
```
    Adds a Principal to the group.
    
    Parameters:
    
    user - the principal to add
    
    Returns:
    
    true if the operation was successful
  - clear
```
public void clear()
```
    Clears all Principals from the group list.
  - equals
```
public boolean equals(Object o)
```
    Two DefaultGroups are equal if they contain identical member Principals and have the same name.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    o - the object to compare
    
    Returns:
    
    the comparison
  - hashCode
```
public int hashCode()
```
    The hashcode is calculated as a XOR sum over all members of the Group.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    the hash code
  - getCreated
```
public Date getCreated()
```
    Returns the creation date.
    
    Returns:
    
    the creation date
  - getCreator
```
public final String getCreator()
```
    Returns the creator of this Group.
    
    Returns:
    
    the creator
  - getLastModified
```
public Date getLastModified()
```
    Returns the last-modified date.
    
    Returns:
    
    the date and time of last modification
  - getModifier
```
public final String getModifier()
```
    Returns the name of the user who last modified this group.
    
    Returns:
    
    the modifier
  - getName
```
public String getName()
```
    The name of the group. This is set in the class constructor.
    
    Returns:
    
    the name of the Group
  - getPrincipal
```
public Principal getPrincipal()
```
    Returns the GroupPrincipal that represents this Group.
    
    Returns:
    
    the group principal
  - getWiki
```
public String getWiki()
```
    Returns the wiki name.
    
    Returns:
    
    the wiki name
  - isMember
```
public boolean isMember(Principal principal)
```
    Returns true if a Principal is a member of the group. Specifically, the Principal's getName() method must return the same value as one of the Principals in the group member list. The Principal's type does not need to match.
    
    Parameters:
    
    principal - the principal about whom membeship status is sought
    
    Returns:
    
    the result of the operation
  - members
```
public Principal[] members()
```
    Returns the members of the group as an array of Principal objects.
    
    Returns:
    
    the members
  - remove
```
public boolean remove(Principal user)
```
    Removes a Principal from the group.
    
    Parameters:
    
    user - the principal to remove
    
    Returns:
    
    true if the operation was successful
  - setCreated
```
public void setCreated(Date date)
```
    Sets the created date.
    
    Parameters:
    
    date - the creation date
  - setCreator
```
public final void setCreator(String creator)
```
    Sets the creator of this Group.
    
    Parameters:
    
    creator - the creator
  - setLastModified
```
public void setLastModified(Date date)
```
    Sets the last-modified date
    
    Parameters:
    
    date - the last-modified date
  - setModifier
```
public final void setModifier(String modifier)
```
    Sets the name of the user who last modified this group.
    
    Parameters:
    
    modifier - the modifier
  - toString
```
public String toString()
```
    Returns a string representation of the Group.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    the string
    
    See Also:
    
    Object.toString()

Class Group

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Group

Method Detail

add

clear

equals

hashCode

getCreated

getCreator

getLastModified

getModifier

getName

getPrincipal

getWiki

isMember

members

remove

setCreated

setCreator

setLastModified

setModifier

toString