2 from datetime import datetime, timedelta
4 from sfa.util.xml import XML, XpathFilter
5 from sfa.util.faults import InvalidRSpecElement
7 from sfa.rspecs.rspec_elements import RSpecElement, RSpecElements
8 from sfa.rspecs.version_manager import VersionManager
12 def __init__(self, rspec="", version=None, user_options={}):
13 self.header = '<?xml version="1.0"?>\n'
14 self.template = """<RSpec></RSpec>"""
17 self.version_manager = VersionManager()
18 self.user_options = user_options
25 def create(self, version=None):
29 self.version = self.version_manager.get_version(version)
30 self.namespaces = self.version.namespaces
31 self.parse_xml(self.version.template)
32 # eg. 2011-03-23T19:53:28Z
33 date_format = '%Y-%m-%dT%H:%M:%SZ'
34 now = datetime.utcnow()
35 generated_ts = now.strftime(date_format)
36 expires_ts = (now + timedelta(hours=1)).strftime(date_format)
37 self.xml.set('expires', expires_ts)
38 self.xml.set('generated', generated_ts)
41 def parse_xml(self, xml):
42 self.xml.parse_xml(xml)
45 self.version = self.version_manager.get_version_by_schema(self.xml.schema)
47 #raise InvalidRSpec('unknown rspec schema: %s' % schema)
48 # TODO: Should start raising an exception once SFA defines a schema.
49 # for now we just default to sfa
50 self.version = self.version_manager.get_version({'type':'sfa','version': '1'})
51 self.version.xml = self.xml
52 self.namespaces = self.xml.namespaces
54 def load_rspec_elements(self, rspec_elements):
56 for rspec_element in rspec_elements:
57 if isinstance(rspec_element, RSpecElement):
58 self.elements[rspec_element.type] = rspec_element
60 def register_rspec_element(self, element_type, element_name, element_path):
61 if element_type not in RSpecElements:
62 raise InvalidRSpecElement(element_type, extra="no such element type: %s. Must specify a valid RSpecElement" % element_type)
63 self.elements[element_type] = RSpecElement(element_type, element_name, element_path)
65 def get_rspec_element(self, element_type):
66 if element_type not in self.elements:
67 msg = "ElementType %s not registerd for this rspec" % element_type
68 raise InvalidRSpecElement(element_type, extra=msg)
69 return self.elements[element_type]
71 def get(self, element_type, filter={}, depth=0):
72 elements = self.get_elements(element_type, filter)
73 elements = [self.xml.get_element_attributes(elem, depth=depth) for elem in elements]
76 def get_elements(self, element_type, filter={}):
78 search for a registered element
80 if element_type not in self.elements:
81 msg = "Unable to search for element %s in rspec, expath expression not found." % \
83 raise InvalidRSpecElement(element_type, extra=msg)
84 rspec_element = self.get_rspec_element(element_type)
85 xpath = rspec_element.path + XpathFilter.xpath(filter)
86 return self.xml.xpath(xpath)
88 def merge(self, in_rspec):
89 self.version.merge(in_rspec)
91 def filter(self, filter):
92 if 'component_manager_id' in filter:
93 nodes = self.version.get_node_elements()
95 if 'component_manager_id' not in node.attrib or \
96 node.attrib['component_manager_id'] != filter['component_manager_id']:
97 parent = node.getparent()
101 def toxml(self, header=True):
103 return self.header + self.xml.toxml()
105 return self.xml.toxml()
108 def save(self, filename):
109 return self.xml.save(filename)
111 if __name__ == '__main__':
112 rspec = RSpec('/tmp/resources.rspec')
114 rspec.register_rspec_element(RSpecElements.NETWORK, 'network', '//network')
115 rspec.register_rspec_element(RSpecElements.NODE, 'node', '//node')
116 print rspec.get(RSpecElements.NODE)[0]
117 print rspec.get(RSpecElements.NODE, depth=1)[0]