Dear Dave and all,I have a peculiar use-case I would like to explain you in order to suggest a possible improvement of generateDS (that would be very useful to me).
In attachment you find an XSD schema (package.xsd), an example of XML instance (skycat_example.xml), an originally generateDS generated file (orig.package.py) and the same file modified by me (package.py).
Well, as you can easily see, in skycat_example.xml there is an element named <parameter> that has got the special attribute xsi:type="uri". This because <parameter> is of parameterType type which is an abstract type with many different implementations like, for instance, <uri> (in this case).
When generateDS creates the data structure for <parameter> element, it is not able to recognize its type (I guess), and then treats it as a string, failing to create a suitable class structure.
So, what basically I did was to modify the parameter.build method like this:
def build(self, node_):
attrs = node_.attributes
for item in attrs.itemsNS():
if item[0][0] == "http://www.w3.org/2001/XMLSchema-instance"; and \
item[0][1] == 'type':
type = item[1]
break
self.type = eval("%s()" % type)
self.type.build(node_)
and the parent class buildChildren method like this:
def buildChildren(self, child_, nodeName_):
if child_.nodeType == Node.ELEMENT_NODE and \
nodeName_ == 'group':
obj_ = group.factory()
obj_.build(child_)
self.group.append(obj_)
elif child_.nodeType == Node.ELEMENT_NODE and \
nodeName_ == 'parameter':
obj_ = parameter.factory()
obj_.build(child_)
self.parameter.append(obj_.type)
Here below the complete set of changes:
--- orig.package.py 2008-10-22 15:37:01.000000000 +0200
+++ package.py 2008-10-22 15:34:05.000000000 +0200
@@ -1,7 +1,7 @@
#!/usr/bin/env python
#
-# Generated Wed Oct 22 15:37:01 2008 by generateDS.py.
+# Generated Wed Oct 22 15:09:12 2008 by generateDS.py.
#
import sys
@@ -775,8 +775,7 @@ class psetdefType(object):
for group_ in self.get_group():
group_.export(outfile, level, namespace_, name_='group')
for parameter_ in self.get_parameter():
- showIndent(outfile, level)
- outfile.write('<%sparameter>%s</%sparameter>\n' %
(namespace_, quote_xml(parameter_), namespace_))
+ parameter_.export(outfile, level, namespace_,
name_='parameter')
def exportLiteral(self, outfile, level, name_='psetdefType'):
level += 1
self.exportLiteralAttributes(outfile, level, name_)
@@ -802,7 +801,10 @@ class psetdefType(object):
level += 1
for parameter in self.parameter:
showIndent(outfile, level)
- outfile.write('%s,\n' % quote_python(parameter))
+ outfile.write('parameter(\n')
+ parameter.exportLiteral(outfile, level)
+ showIndent(outfile, level)
+ outfile.write('),\n')
level -= 1
showIndent(outfile, level)
outfile.write('],\n')
@@ -823,10 +825,10 @@ class psetdefType(object):
self.group.append(obj_)
elif child_.nodeType == Node.ELEMENT_NODE and \
nodeName_ == 'parameter':
- parameter_ = ''
- for text__content_ in child_.childNodes:
- parameter_ += text__content_.nodeValue
- self.parameter.append(parameter_)
+ obj_ = parameter.factory()
+ obj_.build(child_)
+ self.parameter.append(obj_.type)
+
# end class psetdefType
@@ -865,11 +867,13 @@ class parameter(object):
outfile.write('valueOf_ = "%s",\n' % (self.valueOf_,))
def build(self, node_):
attrs = node_.attributes
- self.buildAttributes(attrs)
- self.valueOf_ = ''
- for child_ in node_.childNodes:
- nodeName_ = child_.nodeName.split(':')[-1]
- self.buildChildren(child_, nodeName_)
+ for item in attrs.itemsNS():
+ if item[0][0] ==
"http://www.w3.org/2001/XMLSchema-instance"; and \
+ item[0][1] == 'type':
+ type = item[1]
+ break
+ self.type = eval("%s()" % type)
+ self.type.build(node_)
def buildAttributes(self, attrs):
pass
def buildChildren(self, child_, nodeName_):
@@ -4108,7 +4112,7 @@ def parseLiteral(inFileName):
rootObj.build(rootNode)
# Enable Python to collect the space used by the DOM.
doc = None
- sys.stdout.write('from orig.package import *\n\n')
+ sys.stdout.write('from package import *\n\n')
sys.stdout.write('rootObj = package(\n')
rootObj.exportLiteral(sys.stdout, 0, name_="package")
sys.stdout.write(')\n')
I have tried to put my dirty hands in generateDS code in order to make
it supporting this peculiar case, but I didn't succeed. Please, can you
give me a hint or help me to improve generateDS in this direction?
Thanks in advance. Luigi -- Luigi Paioro INAF - IASF Milano Via Bassini 15, I-20133 Milano, Italy Phone (+39) 02 23 699 470 Fax (+39) 02 26 660 17 Site http://www.iasf-milano.inaf.it/luigi/
package.tar.gz
Description: GNU Zip compressed data
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