sface/sfidata.py

   1 import os
   2 from PyQt4.QtCore import *
   3 from PyQt4.QtGui import *
   4
   5 from lxml import etree
   6 from sfa.util.record import SfaRecord, SliceRecord, AuthorityRecord
   7 from sfa.rspecs.rspec_parser import parse_rspec
   8 from sface.config import config
   9
  10 class SfiData:
  11     def __init__(self):
  12         pass
  13
  14     def getAuthorityHrns(self, type=None):
  15         names = []
  16         if os.path.exists(config.getAuthorityListFile()):
  17             xml = open(config.getAuthorityListFile()).read()
  18             tree = etree.fromstring(xml)
  19             records = tree.xpath("//recordlist/record")
  20
  21             for record in records:
  22                 recType = record.attrib.get("type", None)
  23                 recHrn = record.attrib.get("hrn", None)
  24                 if (type==None) or (type==recType):
  25                     names.append(recHrn)
  26
  27         return names
  28
  29     def getSliceRecord(self):
  30         rec_file = config.getSliceRecordFile()
  31         if os.path.exists(rec_file):
  32             xml = open(rec_file).read()
  33             rec = SliceRecord()
  34             rec.load_from_string(xml)
  35             return rec
  36         return None
  37
  38     def purgeNonSliceResources(self, rspec):
  39         networks = rspec.get_networks()
  40         for network in networks:
  41             all_nodes = rspec.get_nodes(network)
  42             sliver_nodes = rspec.get_nodes_with_slivers(network)
  43             available_nodes = [ node for node in all_nodes if node not in sliver_nodes ]
  44
  45             for node in available_nodes:
  46                 node_elem = rspec.get_node_element(node, network)
  47                 parent = node_elem.xpath("..")[0]
  48                 parent.remove(node_elem)
  49
  50     def getSliceRSpec(self):
  51         rspec_file = config.getSliceRSpecFile()
  52         if os.path.exists(rspec_file):
  53             xml = open(rspec_file).read()
  54             rspec = parse_rspec(xml)
  55
  56             self.purgeNonSliceResources(rspec)
  57
  58             return rspec
  59         return None
  60
  61     def getResourcesRSpec(self):
  62         rspec_file = config.getResourcesRSpecFile()
  63         if os.path.exists(rspec_file):
  64             xml = open(rspec_file).read()
  65             return parse_rspec(xml)
  66         return None