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# -*- coding: utf-8 -*-
##############################################
#
# Swing Entwicklung betrieblicher Informationssysteme GmbH
# (<http://www.swing-system.com>)
# Copyright (C) ChriCar Beteiligungs- und Beratungs- GmbH
# all rights reserved
# 24-JUN-2009 (GK) created
# 02-AUG-2009 (GK) Interface changed from file to string
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs.
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company.
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/> or
# write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
###############################################
from lxml import etree
import logging
class XML_Generator (object) :
_logger = logging.getLogger('XML_Generator')
def __init__ (self, template, nsmap=None) :
self.root = etree.fromstring (template)
self.nsmap = nsmap
# end def __init__
def generate (self, **scope_dict) :
if self.nsmap :
root = etree.Element (self.root.tag, self.root.attrib, nsmap = self.nsmap)
else :
root = etree.Element (self.root.tag, self.root.attrib)
self.out = etree.ElementTree (root)
self._iterate (self.root, root, scope_dict)
return self.out
# end def generate
def write (self, xml_file, pretty = True) :
from xml.dom.ext import PrettyPrint
from xml.dom.ext.reader.Sax import FromXmlFile
try :
f = open (xml_file, "w")
try :
self.out.write (f)
finally :
f.close ()
except (SystemExit, KeyboardInterrupt), exc :
raise
if pretty :
doc = FromXmlFile (xml_file)
try :
f = open (xml_file, "w")
try :
PrettyPrint (doc, f)
finally :
f.close ()
except (SystemExit, KeyboardInterrupt), exc :
raise
# end def write
def _iterate (self, elm, out, scope_dict) :
for name,value in out.items () :
if name [0:9] == "attr-name" :
del out.attrib[name]
del out.attrib["attr-eval" + name [9:]]
for name, value in elm.items () :
if name [0:9] == "attr-name" :
nr = name [9:]
try :
val = eval (elm.attrib ["attr-eval" + nr], scope_dict)
out.set (elm.attrib [name], unicode (val))
except :
self._logger.error('ERROR in attr-eval for `%s` `%s` `%s`', elm.tag, name, elm.attrib["attr-eval" + nr])
raise
elif name [0:9] == "attr-eval" : pass
elif name == "text-eval":
try :
out.text = unicode (eval (value, scope_dict))
except :
self._logger.error('ERROR in text-eval for `%s` `%s` `%s`', out.tag, name, value)
raise
for c in elm.getchildren () :
if "loop-eval" in c.attrib :
try :
objs = eval \
("[(%s) for %s in (%s)]" %
( c.attrib["var"]
, c.attrib["var"]
, c.attrib["loop-eval"]
)
, scope_dict
)
except :
self._logger.error('ERROR in loop-eval for `%s` `%s`', c.tag, c.attrib["loop-eval"])
raise
if not ("omit_on_empty" in c.attrib and c.attrib["omit_on_empty"] == "True" and not objs) :
x = etree.SubElement (out, c.tag)
for o in objs :
scope_dict [c.attrib["var"]] = o
self._iterate (c, x, scope_dict)
del scope_dict [c.attrib ["var"]]
elif "seq-eval" in c.attrib :
try :
objs = eval \
("[(%s) for %s in (%s)]" %
( c.attrib["var"]
, c.attrib["var"]
, c.attrib["seq-eval"]
)
, scope_dict
)
except :
self._logger.error('ERROR in seq-eval for `%s` `%s`', c.tag, c.attrib["seq-eval"])
raise
for o in objs :
scope_dict [c.attrib["var"]] = o
x = etree.SubElement (out, c.tag)
self._iterate (c, x, scope_dict)
del scope_dict [c.attrib ["var"]]
else :
x = etree.SubElement (out, c.tag)
for name, value in c.items () :
if name == "loop-eval" : pass
elif name == "seq-eval": pass
elif name == "var" : pass
elif name [0:9] == "attr-eval" : pass
elif name == "text-eval":
try :
x.text = unicode (eval (value, scope_dict))
except :
self._logger.error('ERROR in text-eval for `%s` `%s` `%s`', c.tag, name, value)
raise
elif name [0:9] == "attr-name" :
nr = name [9:]
try :
val = eval (c.attrib ["attr-eval" + nr], scope_dict)
x.set (c.attrib [name], unicode (val))
except :
self._logger.error('ERROR in attr-eval for `%s` `%s` `%s`', c.tag, name, c.attrib["attr-eval" + nr])
raise
else :
x.set (name, value)
self._iterate (c, x, scope_dict)
# end def _iterate
# end class XML_Generator
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