Merge branch 'upstreammaster'

[sfa.git] / sfa / util / xml.py

diff --git a/sfa/util/xml.py b/sfa/util/xml.py
index ac6526c..ddb06e4 100755 (executable)
--- a/sfa/util/xml.py
+++ b/sfa/util/xml.py
@@ -1,10 +1,9 @@
 #!/usr/bin/python 
+from types import StringTypes
 from lxml import etree
 from StringIO import StringIO
-from datetime import datetime, timedelta
-from sfa.util.xrn import *
-from sfa.util.plxrn import hostname_to_urn
-from sfa.util.faults import SfaNotImplemented, InvalidRSpec, InvalidRSpecElement
+
+from sfa.util.faults import InvalidXML
 
 class XpathFilter:
     @staticmethod
@@ -52,18 +51,19 @@ class XML:
             try:
                 tree = etree.parse(StringIO(xml), parser)
             except Exception, e:
-                raise InvalidRSpec(str(e))
+                raise InvalidXML(str(e))
         self.root = tree.getroot()
         # set namespaces map
         self.namespaces = dict(self.root.nsmap)
-        # If the 'None' exist, then it's pointing to the default namespace. This makes 
-        # it hard for us to write xpath queries for the default naemspace because lxml 
-        # wont understand a None prefix. We will just associate the default namespeace 
-        # with a key named 'default'.     
-        if None in self.namespaces:
-            default_namespace = self.namespaces.pop(None)
-            self.namespaces['default'] = default_namespace
-
+        if 'default' not in self.namespaces and None in self.namespaces: 
+            # If the 'None' exist, then it's pointing to the default namespace. This makes 
+            # it hard for us to write xpath queries for the default naemspace because lxml 
+            # wont understand a None prefix. We will just associate the default namespeace 
+            # with a key named 'default'.     
+            self.namespaces['default'] = self.namespaces.pop(None)
+            
+        else:
+            self.namespaces['default'] = 'default' 
         # set schema 
         for key in self.root.attrib.keys():
             if key.endswith('schemaLocation'):
@@ -73,6 +73,42 @@ class XML:
                 namespace, schema  = schema_parts[0], schema_parts[1]
                 break
 
+    def parse_dict(self, d, root_tag_name='xml', element = None):
+        if element is None: 
+            if self.root is None:
+                self.parse_xml('<%s/>' % root_tag_name)
+            element = self.root
+
+        if 'text' in d:
+            text = d.pop('text')
+            element.text = text
+
+        # handle repeating fields
+        for (key, value) in d.items():
+            if isinstance(value, list):
+                value = d.pop(key)
+                for val in value:
+                    if isinstance(val, dict):
+                        child_element = etree.SubElement(element, key)
+                        self.parse_dict(val, key, child_element)
+                    elif isinstance(val, basestring):
+                        child_element = etree.SubElement(element, key).text = val
+                        
+            elif isinstance(value, int):
+                d[key] = unicode(d[key])  
+            elif value is None:
+                d.pop(key)
+
+        # element.attrib.update will explode if DateTimes are in the
+        # dcitionary.
+        d=d.copy()
+        # looks like iteritems won't stand side-effects
+        for k in d.keys():
+            if not isinstance(d[k],StringTypes):
+                del d[k]
+
+        element.attrib.update(d)
+
     def validate(self, schema):
         """
         Validate against rng schema
@@ -82,7 +118,7 @@ class XML:
         if not relaxng(self.root):
             error = relaxng.error_log.last_error
             message = "%s (line %s)" % (error.message, error.line)
-            raise InvalidRSpec(message)
+            raise InvalidXML(message)
         return True
 
     def xpath(self, xpath, namespaces=None):
@@ -102,7 +138,7 @@ class XML:
 
     def add_element(self, name, attrs={}, parent=None, text=""):
         """
-        Generic wrapper around etree.SubElement(). Adds an element to 
+        Wrapper around etree.SubElement(). Adds an element to 
         specified parent node. Adds element to root node is parent is 
         not specified. 
         """
@@ -180,14 +216,32 @@ class XML:
         return self.toxml()
 
     def toxml(self):
-        return etree.tostring(self.root, pretty_print=True)  
+        return etree.tostring(self.root, encoding='UTF-8', pretty_print=True)  
+    
+    # XXX smbaker, for record.load_from_string
+    def todict(self, elem=None):
+        if elem is None:
+            elem = self.root
+        d = {}
+        d.update(elem.attrib)
+        d['text'] = elem.text
+        for child in elem.iterchildren():
+            if child.tag not in d:
+                d[child.tag] = []
+            d[child.tag].append(self.todict(child))
+
+        if len(d)==1 and ("text" in d):
+            d = d["text"]
+
+        return d
         
     def save(self, filename):
         f = open(filename, 'w')
         f.write(self.toxml())
         f.close()
- 
-if __name__ == '__main__':
-    rspec = RSpec('/tmp/resources.rspec')
-    print rspec
+
+# no RSpec in scope 
+#if __name__ == '__main__':
+#    rspec = RSpec('/tmp/resources.rspec')
+#    print rspec