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added the possibility of returning nodesets from XPath extension functions

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* python/types.c python/tests/Makefile.am python/tests/xpathret.py:
  added the possibility of returning nodesets from XPath extension
  functions written in Python
Daniel
This commit is contained in:
Daniel Veillard 2002-03-01 16:14:17 +00:00
parent a94ec6ff13
commit 79426f2b46
4 changed files with 87 additions and 3 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Fri Mar 1 17:12:15 CET 2002 Daniel Veillard <daniel@veillard.com>
* python/types.c python/tests/Makefile.am python/tests/xpathret.py:
added the possibility of returning nodesets from XPath extension
functions written in Python
Fri Mar 1 13:56:12 CET 2002 Daniel Veillard <daniel@veillard.com>
* python/*: commiting some Python bindings work done while travelling

1
python/tests/Makefile.am
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@ -10,6 +10,7 @@ PYTESTS= \
error.py \
validate.py \
tstURI.py \
xpathret.py \
xpath.py
XMLS= \

57
python/tests/xpathret.py Executable file
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@ -0,0 +1,57 @@
#!/usr/bin/python -u
import sys
import libxml2
#memory debug specific
libxml2.debugMemory(1)
#
# A document hosting the nodes returned from the extension function
#
mydoc = libxml2.newDoc("1.0")
def foo(ctx, str):
global mydoc
#
# test returning a node set works as expected
#
parent = mydoc.newDocNode(None, 'p', None)
mydoc.addChild(parent)
node = mydoc.newDocText(str)
parent.addChild(node)
return [parent]
doc = libxml2.parseFile("tst.xml")
ctxt = doc.xpathNewContext()
libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)
res = ctxt.xpathEval("foo('hello')")
if type(res) != type([]):
print "Failed to return a nodeset"
sys.exit(1)
if len(res) != 1:
print "Unexpected nodeset size"
sys.exit(1)
node = res[0]
if node.name != 'p':
print "Unexpected nodeset element result"
sys.exit(1)
node = node.children
if node.type != 'text':
print "Unexpected nodeset element children type"
sys.exit(1)
if node.content != 'hello':
print "Unexpected nodeset element children content"
sys.exit(1)
doc.freeDoc()
mydoc.freeDoc()
ctxt.xpathFreeContext()
#memory debug specific
libxml2.cleanupParser()
if libxml2.debugMemory(1) == 0:
print "OK"
else:
print "Memory leak %d bytes" % (libxml2.debugMemory(1))
libxml2.dumpMemory()

26
python/types.c
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@ -372,10 +372,30 @@ libxml_xmlXPathObjectPtrConvert(PyObject * obj) {
for (i = 0;i < PyList_Size(obj);i++) {
node = PyList_GetItem(obj, i);
if ((node == NULL) || (node->ob_type == NULL) ||
(!PyCObject_Check(node)))
if ((node == NULL) || (node->ob_type == NULL))
continue;
cur = PyxmlNode_Get(node);
cur = NULL;
if (PyCObject_Check(node)) {
printf("Got a CObject\n");
cur = PyxmlNode_Get(node);
} else if (PyInstance_Check(node)) {
PyInstanceObject *inst = (PyInstanceObject *) node;
PyObject *name = inst->in_class->cl_name;
if PyString_Check(name) {
char *type = PyString_AS_STRING(name);
PyObject *wrapper;
if (!strcmp(type, "xmlNode")) {
wrapper = PyObject_GetAttrString(node, "_o");
if (wrapper != NULL) {
cur = PyxmlNode_Get(wrapper);
}
}
}
} else {
printf("Unknown object in Python return list\n");
}
if (cur != NULL) {
xmlXPathNodeSetAdd(set, cur);
}