initial commit after bringing over cleaned up code and testing some examples

daemon/core/xml/xmlparser.py

@@ -0,0 +1,46 @@
+from xml.dom.minidom import parse
+
+from core.xml.xmlparser0 import CoreDocumentParser0
+from core.xml.xmlparser1 import CoreDocumentParser1
+from core.xml.xmlutils import get_first_child_by_tag_name
+
+
+class CoreVersionParser(object):
+    """
+    Helper class to check the version of Network Plan document.  This
+    simply looks for a "Scenario" element; when present, this
+    indicates a 0.0 version document.  The dom member is set in order
+    to prevent parsing a file twice (it can be passed to the
+    appropriate CoreDocumentParser class.)
+    """
+
+    DEFAULT_SCENARIO_VERSION = '1.0'
+
+    def __init__(self, filename, options):
+        if 'dom' in options:
+            self.dom = options['dom']
+        else:
+            self.dom = parse(filename)
+        scenario = get_first_child_by_tag_name(self.dom, 'scenario')
+        if scenario:
+            version = scenario.getAttribute('version')
+            if not version:
+                version = self.DEFAULT_SCENARIO_VERSION
+            self.version = version
+        elif get_first_child_by_tag_name(self.dom, 'Scenario'):
+            self.version = '0.0'
+        else:
+            self.version = 'unknown'
+
+
+def core_document_parser(session, filename, options):
+    vp = CoreVersionParser(filename, options)
+    if 'dom' not in options:
+        options['dom'] = vp.dom
+    if vp.version == '0.0':
+        doc = CoreDocumentParser0(session, filename, options)
+    elif vp.version == '1.0':
+        doc = CoreDocumentParser1(session, filename, options)
+    else:
+        raise ValueError, 'unsupported document version: %s' % vp.version
+    return doc