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modified the generator to allow keeping class references when creating new

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* python/generator.py: modified the generator to allow keeping
  class references when creating new classes, needed to fix a bug
  pointed by Stphane Bidoul where the input buffer of the
  xmlTextReader instance gets destroyed if the python wrapper for
  the input is not referenced anymore.
Daniel
This commit is contained in:
Daniel Veillard
2002-12-31 11:18:37 +00:00
parent 4d8db8a22c
commit dc85f28f66
2 changed files with 42 additions and 1 deletions
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35
python/generator.py
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@ -634,6 +634,10 @@ functions_noexcept = {
"xmlHasNsProp": 1,
}
reference_keepers = {
"xmlTextReader": [('inputBuffer', 'input')],
}
function_classes = {}
function_classes["None"] = []
@ -931,6 +935,10 @@ def buildWrappers():
classes.write("class %s(%s):\n" % (classname,
classes_ancestor[classname]))
classes.write(" def __init__(self, _obj=None):\n")
if reference_keepers.has_key(classname):
rlist = reference_keepers[classname]
for ref in rlist:
classes.write(" self.%s = None\n" % ref[1])
classes.write(" self._o = None\n")
classes.write(" %s.__init__(self, _obj=_obj)\n\n" % (
classes_ancestor[classname]))
@ -944,6 +952,10 @@ def buildWrappers():
txt.write("Class %s()\n" % (classname))
classes.write("class %s:\n" % (classname))
classes.write(" def __init__(self, _obj=None):\n")
if reference_keepers.has_key(classname):
list = reference_keepers[classname]
for ref in list:
classes.write(" self.%s = None\n" % ref[1])
classes.write(" if _obj != None:self._o = _obj;return\n")
classes.write(" self._o = None\n\n");
if classes_destructors.has_key(classname):
@ -1029,9 +1041,30 @@ def buildWrappers():
classes.write(
" if ret is None:raise treeError('%s() failed')\n"
% (name))
classes.write(" return ");
#
# generate the returned class wrapper for the object
#
classes.write(" __tmp = ");
classes.write(classes_type[ret[0]][1] % ("ret"));
classes.write("\n");
#
# Sometime one need to keep references of the source
# class in the returned class object.
# See reference_keepers for the list
#
tclass = classes_type[ret[0]][2]
if reference_keepers.has_key(tclass):
list = reference_keepers[tclass]
for pref in list:
if pref[0] == ref[0]:
classes.write(" __tmp.%s = self\n" %
pref[1])
#
# return the class
#
classes.write(" return __tmp\n");
elif converter_type.has_key(ret[0]):
#
# Raise an exception