Merge branch 'geni-v3' of ssh://git.onelab.eu/git/sfa into geni-v3

[sfa.git] / sfa / rspecs / rspec.py

diff --git a/sfa/rspecs/rspec.py b/sfa/rspecs/rspec.py
index 00095e2..ce16a1d 100755 (executable)
--- a/sfa/rspecs/rspec.py
+++ b/sfa/rspecs/rspec.py
@@ -2,52 +2,59 @@
 from datetime import datetime, timedelta
 
 from sfa.util.xml import XML, XpathFilter
-from sfa.util.faults import InvalidRSpecElement
+from sfa.util.faults import InvalidRSpecElement, InvalidRSpec
+from sfa.util.sfatime import SFATIME_FORMAT
 
 from sfa.rspecs.rspec_elements import RSpecElement, RSpecElements 
 from sfa.rspecs.version_manager import VersionManager
 
 class RSpec:
  
-    def __init__(self, rspec="", version=None, user_options={}):
+    def __init__(self, rspec="", version=None, user_options=None, ttl=60):
+        if user_options is None: user_options={}
         self.header = '<?xml version="1.0"?>\n'
         self.template = """<RSpec></RSpec>"""
         self.version = None
         self.xml = XML()
         self.version_manager = VersionManager()
         self.user_options = user_options
+        self.ttl = ttl
         self.elements = {}
         if rspec:
-            self.parse_xml(rspec)
-        else:
+            if version:
+                self.version = self.version_manager.get_version(version)
+                self.parse_xml(rspec, version)
+            else:
+                self.parse_xml(rspec)
+        elif version:
             self.create(version)
+        else:
+            raise InvalidRSpec("No RSpec or version specified. Must specify a valid rspec string or a valid version") 
 
-    def create(self, version=None):
+    def create(self, version=None, ttl=60):
         """
         Create root element
+        ttl: time to live in minutes, this will determine the expires tag of the RSpec
         """
         self.version = self.version_manager.get_version(version)
         self.namespaces = self.version.namespaces
-        self.parse_xml(self.version.template) 
-        # eg. 2011-03-23T19:53:28Z 
-        date_format = '%Y-%m-%dT%H:%M:%SZ'
+        self.parse_xml(self.version.template, self.version) 
         now = datetime.utcnow()
-        generated_ts = now.strftime(date_format)
-        expires_ts = (now + timedelta(hours=1)).strftime(date_format) 
+        generated_ts = now.strftime(SFATIME_FORMAT)
+        expires_ts = (now + timedelta(minutes=self.ttl)).strftime(SFATIME_FORMAT) 
         self.xml.set('expires', expires_ts)
         self.xml.set('generated', generated_ts)
 
-
-    def parse_xml(self, xml):
+    def parse_xml(self, xml, version=None):
         self.xml.parse_xml(xml)
-        self.version = None
-        if self.xml.schema:
-            self.version = self.version_manager.get_version_by_schema(self.xml.schema)
-        else:
-            #raise InvalidRSpec('unknown rspec schema: %s' % schema)
-            # TODO: Should start raising an exception once SFA defines a schema.
-            # for now we just  default to sfa 
-            self.version = self.version_manager.get_version({'type':'sfa','version': '1'})
+        if not version:
+            if self.xml.schema:
+                self.version = self.version_manager.get_version_by_schema(self.xml.schema)
+            else:
+                #raise InvalidRSpec('unknown rspec schema: %s' % schema)
+                # TODO: Should start raising an exception once SFA defines a schema.
+                # for now we just  default to sfa 
+                self.version = self.version_manager.get_version({'type':'sfa','version': '1'})
         self.version.xml = self.xml    
         self.namespaces = self.xml.namespaces
     
@@ -68,15 +75,17 @@ class RSpec:
             raise InvalidRSpecElement(element_type, extra=msg)
         return self.elements[element_type]
 
-    def get(self, element_type, filter={}, depth=0):
+    def get(self, element_type, filter=None, depth=0):
+        if filter is None: filter={}
         elements = self.get_elements(element_type, filter)
         elements = [self.xml.get_element_attributes(elem, depth=depth) for elem in elements]
         return elements
 
-    def get_elements(self, element_type, filter={}):
+    def get_elements(self, element_type, filter=None):
         """
         search for a registered element
         """
+        if filter is None: filter={}
         if element_type not in self.elements:
             msg = "Unable to search for element %s in rspec, expath expression not found." % \
                    element_type
@@ -90,12 +99,12 @@ class RSpec:
 
     def filter(self, filter):
         if 'component_manager_id' in filter:    
-            nodes = self.version.get_node_elements()
+            nodes = self.version.get_nodes()
             for node in nodes:
                 if 'component_manager_id' not in node.attrib or \
                   node.attrib['component_manager_id'] != filter['component_manager_id']:
                     parent = node.getparent()
-                    parent.remove(node) 
+                    parent.remove(node.element) 
         
 
     def toxml(self, header=True):