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| author | Lance Stout <lancestout@gmail.com> | 2011-11-22 15:25:02 -0800 |
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| committer | Lance Stout <lancestout@gmail.com> | 2011-11-22 15:25:02 -0800 |
| commit | 6906c15e8ee20633ae0bf94fee1a99d916ceedc8 (patch) | |
| tree | f933aee58924c878b3fff92823667c4ba68442fb /docs/api/stanzabase.rst | |
| parent | ff5421cefcd2f86fef362d8fd8b387f7e812cc85 (diff) | |
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Update docs for tostring
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| -rw-r--r-- | docs/api/stanzabase.rst | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/docs/api/stanzabase.rst b/docs/api/stanzabase.rst deleted file mode 100644 index 5a2c9a06..00000000 --- a/docs/api/stanzabase.rst +++ /dev/null @@ -1,121 +0,0 @@ -========== -stanzabase -========== - -.. module:: sleekxmpp.xmlstream.stanzabase - -The :mod:`sleekmxpp.xmlstream.stanzabase` module provides a wrapper for the -standard :mod:`xml.etree.cElementTree` module that makes working with XML -less painful. Instead of having to manually move up and down an element -tree and insert subelements and attributes, you can interact with an object -that behaves like a normal dictionary or JSON object, which silently maps -keys to XML attributes and elements behind the scenes. - -Overview --------- - -The usefulness of this layer grows as the XML you have to work with -becomes nested. The base unit here, :class:`ElementBase`, can map to a -single XML element, or several depending on how advanced of a mapping -is desired from interface keys to XML structures. For example, a single -:class:`ElementBase` derived class could easily describe: - -.. code-block:: xml - - <message to="user@example.com" from="friend@example.com"> - <body>Hi!</body> - <x:extra> - <x:item>Custom item 1</x:item> - <x:item>Custom item 2</x:item> - <x:item>Custom item 3</x:item> - </x:extra> - </message> - -If that chunk of XML were put in the :class:`ElementBase` instance -``msg``, we could extract the data from the XML using:: - - >>> msg['extra'] - ['Custom item 1', 'Custom item 2', 'Custom item 3'] - -Provided we set up the handler for the ``'extra'`` interface to load the -``<x:item>`` element content into a list. - -The key concept is that given an XML structure that will be repeatedly -used, we can define a set of :term:`interfaces` which when we read from, -write to, or delete, will automatically manipulate the underlying XML -as needed. In addition, some of these interfaces may in turn reference -child objects which expose interfaces for particularly complex child -elements of the original XML chunk. - -.. seealso:: - :ref:`create-stanza-interfaces`. - -Because the :mod:`sleekxmpp.xmlstream.stanzabase` module was developed -as part of an `XMPP <http://xmpp.org>`_ library, these chunks of XML are -referred to as :term:`stanzas <stanza>`, and in SleekXMPP we refer to a -subclass of :class:`ElementBase` which defines the interfaces needed for -interacting with a given :term:`stanza` a :term:`stanza object`. - -To make dealing with more complicated and nested :term:`stanzas <stanza>` -or XML chunks easier, :term:`stanza objects <stanza object>` can be -composed in two ways: as iterable child objects or as plugins. Iterable -child stanzas, or :term:`substanzas`, are accessible through a special -``'substanzas'`` interface. This option is useful for stanzas which -may contain more than one of the same kind of element. When there is -only one child element, the plugin method is more useful. For plugins, -a parent stanza object delegates one of its XML child elements to the -plugin stanza object. Here is an example: - -.. code-block:: xml - - <iq type="result"> - <query xmlns="http://jabber.org/protocol/disco#info"> - <identity category="client" type="bot" name="SleekXMPP Bot" /> - </query> - </iq> - -We can can arrange this stanza into two objects: an outer, wrapper object for -dealing with the ``<iq />`` element and its attributes, and a plugin object to -control the ``<query />`` payload element. If we give the plugin object the -name ``'disco_info'`` (using its :attr:`ElementBase.plugin_attrib` value), then -we can access the plugin as so:: - - >>> iq['disco_info'] - '<query xmlns="http://jabber.org/protocol/disco#info"> - <identity category="client" type="bot" name="SleekXMPP Bot" /> - </query>' - -We can then drill down through the plugin object's interfaces as desired:: - - >>> iq['disco_info']['identities'] - [('client', 'bot', 'SleekXMPP Bot')] - -Plugins may also add new interfaces to the parent stanza object as if they -had been defined by the parent directly, and can also override the behaviour -of an interface defined by the parent. - -.. seealso:: - - - :ref:`create-stanza-plugins` - - :ref:`create-extension-plugins` - - :ref:`override-parent-interfaces` - - -Registering Stanza Plugins --------------------------- - -.. autofunction:: register_stanza_plugin - -ElementBase ------------ - -.. autoclass:: ElementBase - :members: - :private-members: - :special-members: - -StanzaBase ----------- - -.. autoclass:: StanzaBase - :members: |