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## org.jbpm.task.identity
Class DBUserGroupCallbackImpl

    java.lang.Object
      org.jbpm.task.identity.DBUserGroupCallbackImpl

All Implemented Interfaces:
  UserGroupCallback

    public class DBUserGroupCallbackImpl

extends Object
implements UserGroupCallback

Data base server user group callback implementation that utilizes SQL queries to get information about user, groups and relationship of these two.
There are four configuration parameters required by this callback:

- db.ds.jndi.name - JNDI name of the data source to be used for connections
- db.user.query - query used to verify existence of the user (case sensitive, expects a single parameter on position 1)
- db.roles.query - query user to check group existence (case sensitive, expects single parameter on position 1)
- db.user.roles.query - query used to collect group for given user (case sensitive, expects single parameter on position 1, retrieves group name from position 1 of returned result set)

Field Summary
`protected static String` | `DEFAULT_PROPERTIES_NAME`
`static String` | `DS_JNDI_NAME`
`static String` | `PRINCIPAL_QUERY`
`static String` | `ROLES_QUERY`
`static String` | `USER_ROLES_QUERY`

Constructor Summary
`DBUserGroupCallbackImpl()`
`DBUserGroupCallbackImpl(Properties config)`

Method Summary
`protected boolean` | `checkExistence(String querySql, String parameter)`
`boolean` | `existsGroup(String groupId)` Resolves existence of group id.
`boolean` | `existsUser(String userId)` Resolves existence of user id.
`protected Connection` | `getConnection()`
`List<String>` | `getGroupsForUser(String userId, List<String> groupIds, List<String> allExistingGroupIds)` Returns list of group ids for specified user id.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### DEFAULT_PROPERTIES_NAME

    protected static final String DEFAULT_PROPERTIES_NAME

See Also:
  Constant Field Values

### DS_JNDI_NAME

    public static final String DS_JNDI_NAME

See Also:
  Constant Field Values

### PRINCIPAL_QUERY

    public static final String PRINCIPAL_QUERY

See Also:
  Constant Field Values

### USER_ROLES_QUERY

    public static final String USER_ROLES_QUERY

See Also:
  Constant Field Values

### ROLES_QUERY

    public static final String ROLES_QUERY

See Also:
  Constant Field Values

Constructor Detail

### DBUserGroupCallbackImpl

    public DBUserGroupCallbackImpl()

### DBUserGroupCallbackImpl

    public DBUserGroupCallbackImpl(Properties config)

Method Detail

### existsUser

    public boolean existsUser(String userId)

  Description copied from interface: `UserGroupCallback`
  Resolves existence of user id.

  Specified by:
    `existsUser` in interface `UserGroupCallback`
  Parameters:
    `userId` - the user id assigned to the task
  Returns:
    true if userId exists, false otherwise.

### existsGroup

    public boolean existsGroup(String groupId)

  Description copied from interface: `UserGroupCallback`
  Resolves existence of group id.

  Specified by:
    `existsGroup` in interface `UserGroupCallback`
  Parameters:
    `groupId` - the group id assigned to the task
  Returns:
    true if groupId exists, false otherwise.

### getGroupsForUser

    public List<String> getGroupsForUser(String userId,
                                         List<String> groupIds,
                                         List<String> allExistingGroupIds)

  Description copied from interface: `UserGroupCallback`
  Returns list of group ids for specified user id.

  Specified by:
    `getGroupsForUser` in interface `UserGroupCallback`
  Parameters:
    `userId` - the user id assigned to the task
    `groupIds` - list of group ids assigned to the task
    `allExistingGroupIds` - list of all currently known group ids
  Returns:
    List of group ids.

### getConnection

    protected Connection getConnection()
                                throws SQLException

  Throws:
    `SQLException`

### checkExistence

    protected boolean checkExistence(String querySql,
                                     String parameter)

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