tigase.xmpp

## Class BareJID

- java.lang.Object
- - tigase.xmpp.BareJID

- All Implemented Interfaces:
    Comparable<BareJID>

      public final class BareJID
      extends Object
      implements Comparable<BareJID>

  Instance of the `BareJID` class holds a single, bare JID. When the object is created the parameters are checked and processed through the stringprep. An exception is throw in case of stringprep processing error. The instances of the class are immutable objects.

  There are planed various optimisations for the class implementation, one of them is to allow for comparing the instanced by references ('==') instead of of equals() method. This is to improve the performance and lower memory usage. Other improvements and optimisations are also planed.
  Some of the optimisations require that the instances are created in strictly controlled way, hence there is no public constructor and you have to use factory methods to create a new instance of the `BareJID` class.

  The class also offers a few utility methods for parsing and constructing JID strings. Please see JavaDoc documentation for more details. Created: Dec 28, 2009 10:47:51 PM
  Version:
    $Rev$
  Author:
    Artur Hefczyc

- - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static BareJID` | `bareJIDInstance(String jid)` The method creates an instance of the `BareJID` class.
    `static BareJID` | `bareJIDInstance(String p_localpart, String p_domain)` The method creates an instance of the `BareJID` class.
    `static BareJID` | `bareJIDInstanceNS(String jid)` The method creates an instance of the `BareJID` class.
    `static BareJID` | `bareJIDInstanceNS(String p_localpart, String p_domain)` The method creates an instance of the `BareJID` class.
    `int` | `compareTo(BareJID o)` Method compares the `BareJID` instance to the object given as a parameter.
    `boolean` | `equals(Object b)` Method compares whether this `BareJID` instance represents the same user bare JID as the one given in parameter.
    `String` | `getDomain()` Method returns a domain part of the `BareJID`.
    `String` | `getLocalpart()` Method returns a localpart (nickname) of the `BareJID`.
    `int` | `hashCode()` Method returns a hash code calculated for the `BareJID` instance.
    `static String` | `jidToBareJID(String jid)` A utility method to strip the resource part from the given JID string.
    `static String[]` | `parseJID(String jid)` A utility method to parse and split the given JID string into separate parts.
    `String` | `toString()` Method returns a `String` representation of the `BareJID` instance.
    `static String` | `toString(BareJID bareJid, String p_resource)` A utility method to construct a `String` representing user JID from given parameters.
    `static String` | `toString(String p_localpart, String p_domain)` A utility method to construct a `String` representing user JID from given parameters.
    `static String` | `toString(String p_localpart, String p_domain, String p_resource)` A utility method to construct a `String` representing user JID from given parameters.
    `static void` | `useStringprepProcessor(String stringprepProcessor)` Changes stringprep processor implementation used for the JID checking.

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Method Detail

    - #### bareJIDInstance

          public static BareJID bareJIDInstance(String jid)
                                         throws TigaseStringprepException

      The method creates an instance of the `BareJID` class. The bare JID is parsed and constructed from the `String` parameter.

      The localpart (nick name) and the domain part of the JID are parsed and processed through the stringprep. If a strngprep parsing error occurs an exception is thrown.
      The resource part, if provided in the JID paramater, is thrown away.

      Please note, the method does not necessarily has to return a new instance of the class. It may return the same exact object every time you pass parameters which refer to the same bare JID identifier.
      Parameters:
        `jid` - is a `String` parameter used to create the bare JID instance.
      Returns:
        an instance of the `BareJID` class which corresponds to the JID given as the parameter.
      Throws:
        `TigaseStringprepException` - if the stringprep processing fails for any JID part used to create the instance.

    - #### bareJIDInstance

          public static BareJID bareJIDInstance(String p_localpart,
                                                String p_domain)
                                         throws TigaseStringprepException

      The method creates an instance of the `BareJID` class. The bare JID is parsed and constructed from two `String` parameters.

      The localpart (nick name) and the domain part of the JID are parsed and processed through the stringprep. If a strngprep parsing error occurs an exception is thrown.
      Please note, the method does not necessarily has to return a new instance of the class. It may return the same exact object every time you pass parameters which refer to the same bare JID identifier.
      Parameters:
        `p_localpart` - is a `String` parameter assumed to be a JID localpart (nickname) and used to create the bare JID instance. The localpart parameter can be null.
        `p_domain` - is a `String` parameter assumed to be a JID domain part and used to create the bare JID instance. This parameter must not be null.
      Returns:
        an instance of the `BareJID` class which corresponds to the JID given as the parameter.
      Throws:
        `TigaseStringprepException` - if the stringprep processing fails for any JID part used to create the instance.

    - #### bareJIDInstanceNS

          public static BareJID bareJIDInstanceNS(String jid)

      The method creates an instance of the `BareJID` class. The bare JID is parsed and constructed from the `String` parameter. Note, this method does not perform stringprep processing on input parameters.

      The resource part, if provided in the JID paramater, is thrown away.

      Please note, the method does not necessarily has to return a new instance of the class. It may return the same exact object every time you pass parameters which refer to the same bare JID identifier.
      Parameters:
        `jid` - is a `String` parameter used to create the bare JID instance.
      Returns:
        an instance of the `BareJID` class which corresponds to the JID given as the parameter.

    - #### bareJIDInstanceNS

          public static BareJID bareJIDInstanceNS(String p_localpart,
                                                  String p_domain)

      The method creates an instance of the `BareJID` class. The bare JID is parsed and constructed from two `String` parameters. Note, this method does not perform stringprep processing on input parameters.

      Please note, the method does not necessarily has to return a new instance of the class. It may return the same exact object every time you pass parameters which refer to the same bare JID identifier.
      Parameters:
        `p_localpart` - is a `String` parameter assumed to be a JID localpart (nickname) and used to create the bare JID instance. The localpart parameter can be null.
        `p_domain` - is a `String` parameter assumed to be a JID domain part and used to create the bare JID instance. This parameter must not be null.
      Returns:
        an instance of the `BareJID` class which corresponds to the JID given as the parameter.

    - #### jidToBareJID

          public static String jidToBareJID(String jid)

      A utility method to strip the resource part from the given JID string. The method doesn't perform any checkings and it doesn't run stringprep processing on the given parameter. This is a pure string manipulation utility method.
      Parameters:
        `jid` - is a `String` representing user full JID.
      Returns:
        a new `String` instance of the JID wihout resource part.

    - #### parseJID

          public static String[] parseJID(String jid)

      A utility method to parse and split the given JID string into separate parts. The result is returned as a three elements' `String` array:
      1. The first element (index 0) of the array is the JID's localpart (nickname). Can be null.
      2. The second element (index 1) of the array is the JID's domain part.
      3. The third element (index 2) of the array is the JID's resource part. Can be null.
      The method doesn't perform any checkings and it doesn't run stringprep processing on the given parameter. This is a pure string manipulation utility method.
      Parameters:
        `jid` - is a `String` representing user full JID.
      Returns:
        a three element `String` array with parsed JID parts. The array may contain null elements.

    - #### toString

          public static String toString(String p_localpart,
                                        String p_domain)

      A utility method to construct a `String` representing user JID from given parameters. The method doesn't perform any checkings and it doesn't run stringprep processing on the given parameter. This is a pure string manipulation utility method.
      Parameters:
        `p_localpart` - is a JID's localpart (nickname)
        `p_domain` - is a JID's domain part.
      Returns:
        a new `String` representing user's JID build from given parameters. If the localpart is null then the method simply returns parameter given as domain part.

    - #### toString

          public static String toString(String p_localpart,
                                        String p_domain,
                                        String p_resource)

      A utility method to construct a `String` representing user JID from given parameters. The method doesn't perform any checkings and it doesn't run stringprep processing on the given parameter. This is a pure string manipulation utility method.
      Parameters:
        `p_localpart` - is a JID's localpart (nickname)
        `p_domain` - is a JID's domain part.
        `p_resource` - is a JID's resource part.
      Returns:
        a new `String` representing user's JID build from given parameters. If the localpart and resource part is null then the method simply returns parameter given as domain part.

    - #### toString

          public static String toString(BareJID bareJid,
                                        String p_resource)

      A utility method to construct a `String` representing user JID from given parameters. The method doesn't perform any checkings and it doesn't run stringprep processing on the resource parameter.
      Parameters:
        `bareJid` - is a `BareJID` instance.
        `p_resource` - is a JID's resource part.
      Returns:
        a new `String` representing user's JID build from given parameters.

    - #### useStringprepProcessor

          public static void useStringprepProcessor(String stringprepProcessor)

      Changes stringprep processor implementation used for the JID checking. The method can be called at any time to change used processor. All subsequent `JID` and `BareJID` instances are created using a new processor.
      Parameters:
        `stringprepProcessor` - is a `String` value with stringprep processor name or class name implementing stringprep processing interface.

    - #### compareTo

          public int compareTo(BareJID o)

      Method compares the `BareJID` instance to the object given as a parameter. The method implements the `compareTo` specification contract and returns values as we would expect from the call:

           bareJID_1.toString().compareTo(bareJID_2.toString())

      Specified by:
        `compareTo` in interface `Comparable<BareJID>`
      Parameters:
        `o` - is an `BareJID` instance with which the comparision is performed.
      Returns:
        values as we would expect from the call:

             bareJID_1.toString().compareTo(bareJID_2.toString())

    - #### equals

          public boolean equals(Object b)

      Method compares whether this `BareJID` instance represents the same user bare JID as the one given in parameter. It returns `true` of both the localpart (nickname) and domain part are the same for both objects.
      Overrides:
        `equals` in class `Object`
      Parameters:
        `b` - is a `BareJID` object to which the instance is compared.
      Returns:
        a `boolean` value of `true` if both instances represent the same bare JID and `false` otherwise.

    - #### getDomain

          public String getDomain()

      Method returns a domain part of the `BareJID`. Please note the `String` returned is parsed, checked and processed via stringprep, hence it represents a valid domain name as defined in XMPP RFC.
      Returns:
        a domain part of the `BareJID` instance.

    - #### getLocalpart

          public String getLocalpart()

      Method returns a localpart (nickname) of the `BareJID`. Please note the `String` returned is parsed, checked and processed via stringprep, hence it represents a valid localpart as defined in XMPP RFC.
      Returns:
        a localpart (nickname) of the `BareJID` instance.

    - #### hashCode

          public int hashCode()

      Method returns a hash code calculated for the `BareJID` instance.
      Overrides:
        `hashCode` in class `Object`
      Returns:
        an object hash code.

    - #### toString

          public String toString()

      Method returns a `String` representation of the `BareJID` instance.
      Overrides:
        `toString` in class `Object`
      Returns:
        a `String` representation of the `BareJID` instance.

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