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# This program is free software; you can redistribute it and/or modify
# it under the terms of the (LGPL) GNU Lesser General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library Lesser General Public License for more details at
# ( http://www.gnu.org/licenses/lgpl.html ).
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# written by: Jeff Ortel ( jortel@redhat.com )
"""
Provides base classes for XML->object I{unmarshalling}.
"""
from logging import getLogger
from suds import *
from suds.umx import *
from suds.umx.attrlist import AttrList
from suds.sax.text import Text
from suds.sudsobject import Factory, merge
log = getLogger(__name__)
reserved = { 'class':'cls', 'def':'dfn', }
class Core:
"""
The abstract XML I{node} unmarshaller. This class provides the
I{core} unmarshalling functionality.
"""
def process(self, content):
"""
Process an object graph representation of the xml I{node}.
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: A suds object.
@rtype: L{Object}
"""
self.reset()
return self.append(content)
def append(self, content):
"""
Process the specified node and convert the XML document into
a I{suds} L{object}.
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: A I{append-result} tuple as: (L{Object}, I{value})
@rtype: I{append-result}
@note: This is not the proper entry point.
@see: L{process()}
"""
self.start(content)
self.append_attributes(content)
self.append_children(content)
self.append_text(content)
self.end(content)
return self.postprocess(content)
def postprocess(self, content):
"""
Perform final processing of the resulting data structure as follows:
- Mixed values (children and text) will have a result of the I{content.node}.
- Simi-simple values (attributes, no-children and text) will have a result of a
property object.
- Simple values (no-attributes, no-children with text nodes) will have a string
result equal to the value of the content.node.getText().
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: The post-processed result.
@rtype: I{any}
"""
node = content.node
if len(node.children) and node.hasText():
return node
attributes = AttrList(node.attributes)
if attributes.rlen() and \
not len(node.children) and \
node.hasText():
p = Factory.property(node.name, node.getText())
return merge(content.data, p)
if len(content.data):
return content.data
lang = attributes.lang()
if content.node.isnil():
return None
if not len(node.children) and content.text is None:
if self.nillable(content):
return None
else:
return Text('', lang=lang)
if isinstance(content.text, basestring):
return Text(content.text, lang=lang)
else:
return content.text
def append_attributes(self, content):
"""
Append attribute nodes into L{Content.data}.
Attributes in the I{schema} or I{xml} namespaces are skipped.
@param content: The current content being unmarshalled.
@type content: L{Content}
"""
attributes = AttrList(content.node.attributes)
for attr in attributes.real():
name = attr.name
value = attr.value
self.append_attribute(name, value, content)
def append_attribute(self, name, value, content):
"""
Append an attribute name/value into L{Content.data}.
@param name: The attribute name
@type name: basestring
@param value: The attribute's value
@type value: basestring
@param content: The current content being unmarshalled.
@type content: L{Content}
"""
key = name
key = '_%s' % reserved.get(key, key)
setattr(content.data, key, value)
def append_children(self, content):
"""
Append child nodes into L{Content.data}
@param content: The current content being unmarshalled.
@type content: L{Content}
"""
for child in content.node:
cont = Content(child)
cval = self.append(cont)
key = reserved.get(child.name, child.name)
if key in content.data:
v = getattr(content.data, key)
if isinstance(v, list):
v.append(cval)
else:
setattr(content.data, key, [v, cval])
continue
if self.unbounded(cont):
if cval is None:
setattr(content.data, key, [])
else:
setattr(content.data, key, [cval,])
else:
setattr(content.data, key, cval)
def append_text(self, content):
"""
Append text nodes into L{Content.data}
@param content: The current content being unmarshalled.
@type content: L{Content}
"""
if content.node.hasText():
content.text = content.node.getText()
def reset(self):
pass
def start(self, content):
"""
Processing on I{node} has started. Build and return
the proper object.
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: A subclass of Object.
@rtype: L{Object}
"""
content.data = Factory.object(content.node.name)
def end(self, content):
"""
Processing on I{node} has ended.
@param content: The current content being unmarshalled.
@type content: L{Content}
"""
pass
def bounded(self, content):
"""
Get whether the content is bounded (not a list).
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: True if bounded, else False
@rtype: boolean
'"""
return ( not self.unbounded(content) )
def unbounded(self, content):
"""
Get whether the object is unbounded (a list).
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: True if unbounded, else False
@rtype: boolean
'"""
return False
def nillable(self, content):
"""
Get whether the object is nillable.
@param content: The current content being unmarshalled.
@type content: L{Content}
@return: True if nillable, else False
@rtype: boolean
'"""
return False
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