tigase.db.comp

## Interface RepositoryItem

- All Known Implementing Classes:
    ClusterRepoItem, CompRepoItem, ConfigItem, RepositoryItemAbstract, TaskConfigItem, VHostItem

      public interface RepositoryItem

  The interface defines a contract for a repository item handled by ComponentRepository implementation. Created: Oct 3, 2009 2:35:58 PM
  Author:
    Artur Hefczyc

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addCommandFields(Packet packet)` The method is used for handling ad-hoc commands.
    `String[]` | `getAdmins()` Returns an array with the Item administrators, that is people IDs who can manage, configure and control less critical elements of the Item, like changing less critical configuration settings.
    `String` | `getKey()` Returns a unique key for the item in the repository.
    `String` | `getOwner()` Returns the owner ID of the item.
    `void` | `initFromCommand(Packet packet)` The method used for handling ad-hoc commands.
    `void` | `initFromElement(Element elem)` The item can be also initialized from a more complex repositories: XML repository or SQL database.
    `void` | `initFromPropertyString(String propString)` The item can be initialized based on the data loaded from a configuration file.
    `boolean` | `isAdmin(String id)` The method checks whether the given id is one of the administrators set for the Item.
    `boolean` | `isOwner(String id)` The method checks whether the person with given ID is the Item owner.
    `void` | `setAdmins(String[] admins)` Returns an array with the Item administrators, that is people IDs who can manage, configure and control less critical elements of the Item, like changing less critical configuration settings.
    `void` | `setOwner(String owner)` Set the Item owner.
    `Element` | `toElement()` Item data can be stored in a more complex form than a simple property string.
    `String` | `toPropertyString()` The item can be initialized based on the data loaded from a configuration file.

- - ### Method Detail

    - #### addCommandFields

          void addCommandFields(Packet packet)

      The method is used for handling ad-hoc commands. The 'empty' ad-hoc command packet is provided and the Item should fill it with fields for the user.
      Parameters:
        `packet` - with empty ad-hoc command to fill with fields

    - #### getAdmins

          String[] getAdmins()

      Returns an array with the Item administrators, that is people IDs who can manage, configure and control less critical elements of the Item, like changing less critical configuration settings. Administrators cannot remove the Item or change the owner or add/remove administrators.
      Returns:
        an array with the Item administrators IDs.

    - #### getKey

          String getKey()

      Returns a unique key for the item in the repository. All items are stored in a memory cache which is a Map. And the key returned by this method is the item identifier in the Map.
      Returns:
        an Item key.

    - #### getOwner

          String getOwner()

      Returns the owner ID of the item. This is used for a management to allow fine tuned service administration with roles assigned to specific elements and items. Normally only owner can perform some critical actions like removing the item, managing item administrators or changing owner.
      There can be only one Item owner.
      Returns:
        an ID of the Item owner.

    - #### initFromCommand

          void initFromCommand(Packet packet)

      The method used for handling ad-hoc commands. After a user fills all given field the ad-hoc command packet is passed back to the item to initialize it with data. Similar method to initFromElement(), but the data source is different.
      Parameters:
        `packet` - with ad-hoc command filled by the user.

    - #### initFromElement

          void initFromElement(Element elem)

      The item can be also initialized from a more complex repositories: XML repository or SQL database. In such a case more complex representation is prefered, possibly carrying more information about the item. The method is called to initialize the item with a data parsed from an XML representation of the repository.
      Parameters:
        `elem` - XML Element with all the item initialization data.

    - #### initFromPropertyString

          void initFromPropertyString(String propString)

      The item can be initialized based on the data loaded from a configuration file. In such a case the item representation is usually very simplified as a list of parameters separated by a marker. Please note, usually each item is separated from another with a comma, therefore do not use a comma in the item property string. Double collon is commonly used alternative.
      Parameters:
        `propString` - is a property string to initialize the RepositoryItem.

    - #### isAdmin

          boolean isAdmin(String id)

      The method checks whether the given id is one of the administrators set for the Item.
      Parameters:
        `id` - is an ID of a person for which we check access permissions.
      Returns:
        true of the given ID is on a list of administrators and false otherwise.

    - #### isOwner

          boolean isOwner(String id)

      The method checks whether the person with given ID is the Item owner.
      Parameters:
        `id` - is an ID of a person for whom we check access permissions.
      Returns:
        true of the given ID is on the Item owner and false otherwise.

    - #### setAdmins

          void setAdmins(String[] admins)

      Returns an array with the Item administrators, that is people IDs who can manage, configure and control less critical elements of the Item, like changing less critical configuration settings. Administrators cannot remove the Item or change the owner or add/remove administrators.
      Parameters:
        `admins` - is an array with the Item administrators IDs to set for the Item.

    - #### setOwner

          void setOwner(String owner)

      Set the Item owner. This is used for a management to allow fine tuned service administration with roles assigned to specific elements and items. Normally only owner can perform some critical actions like removing the item, managing item administrators or changing owner.
      There can be only one Item owner.
      Parameters:
        `owner` - is the Item owner ID.

    - #### toElement

          Element toElement()

      Item data can be stored in a more complex form than a simple property string. The XML Element can contain much more detailed information about the element than the simplified form and is used to store the repository item in more advanced repositories then just property file. XML repository or SQL database can keep many records for repository item with as much detailed information as needed.
      Returns:
        an XML Element with all the item initialization data.

    - #### toPropertyString

          String toPropertyString()

      The item can be initialized based on the data loaded from a configuration file. In such a case the item representation is usually very simplified as a list of parameters separated by a marker. Please note, usually each item is separated from another with a comma, therefore do not use a comma in the item property string. Double collon is commonly used alternative.
      Returns:
        a property string representing the repository item in a simplified form.

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