# "To One"-Association

    /**
     * <pre>
     *                                   1
     * LeftClass -------------------------- RightClass
     *                           rightrole
     * </pre>
     */

Attribute
`private RightClass rightrole;`

Access Methods Summary
`public boolean` | `setRightRole (RightClass value)`
`public RightClass` | `getRightRole ()`

Access Methods

    public boolean setRightRole (RightClass value)
    {boolean changed = false;
    if (this.rightRole != value)
    {
       if (this.rightRole != null)
       {
          RightClass oldValue = this.rightRole;
          this.rightRole = null;
          oldValue.<method to remove>;
       }
       this.rightRole = value;
       if (value != null)
       {
          value.<method to insert>;
       }
       changed = true;
    }
    return changed;
    }

    public RightClass getRightRole ()
    {return this.rightRole;
    }

Comment
Using a "To One" association in conjunction with a Qualified "To One" or "To Many" association would lead to the following signature: `public boolean setRightRole (KeyType key, RightClass value)
    <method to remove> = removeFromLeftRoles (key, this);
    <method to insert> = addToLeftRoles (key, this);
`