sfa/rspecs/elements/versions/sfav1Sliver.py

   1 from sfa.util.xrn import Xrn
   2 from sfa.util.xml import XmlElement
   3
   4 from sfa.rspecs.elements.element import Element
   5 from sfa.rspecs.elements.sliver import Sliver
   6 from sfa.rspecs.elements.versions.sfav1PLTag import SFAv1PLTag
   7
   8 from sfa.planetlab.plxrn import PlXrn
   9
  10 class SFAv1Sliver:
  11
  12     @staticmethod
  13     def add_slivers(xml, slivers):
  14         if not slivers:
  15             return
  16         if not isinstance(slivers, list):
  17             slivers = [slivers]
  18         for sliver in slivers:
  19             sliver_elem = xml.add_instance('sliver', sliver, ['name'])
  20             tags = sliver.get('tags', [])
  21             if tags:
  22                 for tag in tags:
  23                     SFAv1Sliver.add_sliver_attribute(sliver_elem, tag['tagname'], tag['value'])
  24
  25     @staticmethod
  26     def add_sliver_attribute(xml, name, value):
  27         elem = xml.add_element(name)
  28         elem.set_text(value)
  29
  30     @staticmethod
  31     def get_sliver_attributes(xml):
  32         attribs = []
  33         for elem in xml.iterchildren():
  34             if elem.tag not in Sliver.fields:
  35                 xml_element = XmlElement(elem, xml.namespaces)
  36                 instance = Element(fields=xml_element, element=elem)
  37                 instance['name'] = elem.tag
  38                 instance['value'] = elem.text
  39                 attribs.append(instance)
  40         return attribs
  41
  42     @staticmethod
  43     def get_slivers(xml, filter={}):
  44         xpath = './default:sliver | ./sliver'
  45         sliver_elems = xml.xpath(xpath)
  46         slivers = []
  47         for sliver_elem in sliver_elems:
  48             sliver = Sliver(sliver_elem.attrib,sliver_elem)
  49             if 'component_id' in xml.attrib:
  50                 sliver['component_id'] = xml.attrib['component_id']
  51             sliver['tags'] = SFAv1Sliver.get_sliver_attributes(sliver_elem)
  52             slivers.append(sliver)
  53         return slivers
  54