Package pyxmpp :: Module error :: Class ErrorNode

[hide private]

# Class ErrorNode

source code

Known Subclasses:
  - StanzaErrorNode
  - , StreamErrorNode

Base class for both XMPP stream and stanza errors

Instance Methods | [hide private]

__init__(self, xmlnode_or_cond, ns=None, copy=True, parent=None) Initialize an ErrorNode object. | source code

__from_xml(self, xmlnode, ns, copy, parent) Initialize an ErrorNode object from an XML node. | source code

__del__(self) | source code

free(self) Free the associated XML node. | source code

free_borrowed(self) Free the associated "borrowed" XML node. | source code

`bool`

is_legacy(self) Check if the error node is a legacy error element. | source code

xpath_eval(self, expr, namespaces=None) Evaluate XPath expression on the error element. | source code

`libxml2.xmlNode`

get_condition(self, ns=None) Get the condition element of the error. | source code

`unicode`

get_text(self) Get the description text from the error element. | source code

`libxml2.xmlNode`

add_custom_condition(self, ns, cond, content=None) Add custom condition element to the error. | source code

upgrade(self) Upgrade a legacy error element to the XMPP compliant one. | source code

downgrade(self) Downgrade an XMPP error element to the legacy format. | source code

`str`

serialize(self) Serialize the element node. | source code

Method Details | [hide private]

### __init__(self, xmlnode_or_cond, ns=None, copy=True, parent=None)
(Constructor)

source code

Initialize an ErrorNode object.

Parameters:
  - `xmlnode_or_cond` (`libxml2.xmlNode` or `unicode`) - XML node to be wrapped into this object or error condition name.
  - `ns` (`unicode`) - XML namespace URI of the error condition element (to be used when the provided node has no namespace).
  - `copy` (`bool`) - When `True` then the XML node will be copied, otherwise it is only borrowed.
  - `parent` (`libxml2.xmlNode`) - Parent node for the XML node to be copied or created.

### __from_xml(self, xmlnode, ns, copy, parent)

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Initialize an ErrorNode object from an XML node.

Parameters:
  - `xmlnode` (`libxml2.xmlNode`) - XML node to be wrapped into this object.
  - `ns` (`unicode`) - XML namespace URI of the error condition element (to be used when the provided node has no namespace).
  - `copy` (`bool`) - When `True` then the XML node will be copied, otherwise it is only borrowed.
  - `parent` (`libxml2.xmlNode`) - Parent node for the XML node to be copied or created.

### is_legacy(self)

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Check if the error node is a legacy error element.

Returns: `bool`
  `True` if it is a legacy error.

### xpath_eval(self, expr, namespaces=None)

source code

Evaluate XPath expression on the error element.

The expression will be evaluated in context where the common namespace (the one used for stanza elements, mapped to 'jabber:client', 'jabber:server', etc.) is bound to prefix "ns" and other namespaces are bound accordingly to the `namespaces` list.

Parameters:
  - `expr` (`unicode`) - the XPath expression.
  - `namespaces` (`dict`) - prefix to namespace mapping.
Returns:
  the result of the expression evaluation.

### get_condition(self, ns=None)

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Get the condition element of the error.

Parameters:
  - `ns` (`unicode`) - namespace URI of the condition element if it is not the XMPP namespace of the error element.
Returns: `libxml2.xmlNode`
  the condition element or `None`.

### get_text(self)

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Get the description text from the error element.

Returns: `unicode`
  the text provided with the error or `None`.

### add_custom_condition(self, ns, cond, content=None)

source code

Add custom condition element to the error.

Parameters:
  - `ns` (`unicode`) - namespace URI.
  - `cond` (`unicode`) - condition name.
  - `content` (`unicode`) - content of the element.
Returns: `libxml2.xmlNode`
  the new condition element.

### upgrade(self)

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Upgrade a legacy error element to the XMPP compliant one.

Use the error code provided to select the condition and the <error/> CDATA for the error text.

### downgrade(self)

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Downgrade an XMPP error element to the legacy format.

Add a numeric code attribute according to the condition name.

### serialize(self)

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Serialize the element node.

Returns: `str`
  serialized element in UTF-8 encoding.