initial checkin

diff --git a/sfa/rspecs/sfa_rspec.py b/sfa/rspecs/sfa_rspec.py
new file mode 100755 (executable)
index 0000000..17e4f7d
--- /dev/null
+++ b/sfa/rspecs/sfa_rspec.py
@@ -0,0 +1,76 @@
+#!/usr/bin/python 
+from lxml import etree
+from StringIO import StringIO
+from sfa.rspecs.rspec import RSpec 
+from sfa.util.xrn import *
+from sfa.util.plxrn import hostname_to_urn
+from sfa.util.config import Config  
+
+
+# define some useful xpath queries for this rspec
+xpath_nodes = '//node'
+xpath_nodes_hostnames = '//node/hostname/text()'
+xpath_nodes_with_hostname = '//node[hostname="%s"]/hostname/text()'
+xpath_nodes_with_network = '//network[@name="%s"]//node/hostname/text()'
+xpath_networks = '//network'
+xpath_networks_names = '//network[@name]/@name'
+ 
+
+class SfaRSpec(RSpec):
+    xml = None
+    header = '<?xml version="1.0"?>\n'
+    namespaces = {}
+
+    ########
+    # Parser
+    ########
+    def get_networks(self):
+        network = None 
+        return = self.xml.xpath(xpath_network_names, self.namespaces)
+
+    def get_network_elements(self):
+        return self.xml.xpath(xpath_networks, self.namespaces)
+
+    def get_node_elements(self):
+        return self.xml.xpath(xpath_nodes, self.namespaces)
+
+    def get_nodes(self, network=None, nodes_with_slivers=False):
+        if network == None:
+            nodes = self.xml.xpath(xpath_nodes_hostnames, self.namespaces)
+        else:
+            nodes = self.xml.xpath(xpath_nodes_with_network % network, self.namespaces)
+        return nodes
+
+    #########
+    # Builder
+    ########
+
+    def add_nodes(self, nodes, check_for_dupes=False):
+        if not isinstance(nodes, list):
+            nodes = [nodes]
+        for node in nodes:
+            urn = ""
+            if check_for_dupes and \
+              self.xml.xpath('//rspecv2:node[@component_uuid="%s"]' % urn, self.namespaces):
+                # node already exists
+                continue
+                
+            node_tag = etree.SubElement(self.xml, 'node')
+            node_type_tag = etree.SubElement(node_tag, 'node_type', type_name='pcvm', type_slots='100')
+            available_tag = etree.SubElement(node_tag, 'available').text = 'true'
+            exclusive_tag = etree.SubElement(node_tag, 'exclusive').text = 'false'
+            location_tag = etree.SubElement(node_tag, 'location')
+            interface_tag = etree.SubElement(node_tag, 'interface')
+            
+
+    def add_slivers(self, slivers, check_for_dupes=False): 
+        pass
+
+    def add_links(self, links, check_for_dupes=False):
+        pass
+
+
+if __name__ == '__main__':
+    rspec = SfaRSpec()
+    rspec.add_nodes([1])
+    print rspec