+from sfa.util.xrn import Xrn
+from sfa.util.xml import XmlElement
+
+from sfa.rspecs.elements.element import Element
+from sfa.rspecs.elements.sliver import Sliver
+from sfa.rspecs.elements.versions.sfav1PLTag import SFAv1PLTag
+
+from sfa.planetlab.plxrn import PlXrn
+
+class SFAv1Sliver:
+
+ @staticmethod
+ def add_slivers(xml, slivers):
+ if not slivers:
+ return
+ if not isinstance(slivers, list):
+ slivers = [slivers]
+ for sliver in slivers:
+ sliver_elem = xml.add_instance('sliver', sliver, ['name'])
+ tags = sliver.get('tags', [])
+ if tags:
+ for tag in tags:
+ SFAv1Sliver.add_sliver_attribute(sliver_elem, tag['tagname'], tag['value'])
+
+ @staticmethod
+ def add_sliver_attribute(xml, name, value):
+ elem = xml.add_element(name)
+ elem.set_text(value)
+
+ @staticmethod
+ def get_sliver_attributes(xml):
+ attribs = []
+ for elem in xml.iterchildren():
+ if elem.tag not in Sliver.fields:
+ xml_element = XmlElement(elem, xml.namespaces)
+ instance = Element(fields=xml_element, element=elem)
+ instance['name'] = elem.tag
+ instance['value'] = elem.text
+ attribs.append(instance)
+ return attribs
+
+ @staticmethod
+ def get_slivers(xml, filter={}):
+ xpath = './default:sliver | ./sliver'
+ sliver_elems = xml.xpath(xpath)
+ slivers = []
+ for sliver_elem in sliver_elems:
+ sliver = Sliver(sliver_elem.attrib,sliver_elem)
+ if 'component_id' in xml.attrib:
+ sliver['component_id'] = xml.attrib['component_id']
+ sliver['tags'] = SFAv1Sliver.get_sliver_attributes(sliver_elem)
+ slivers.append(sliver)
+ return slivers
+