sfa/rspecs/pg_rspec_converter.py

   1 #!/usr/bin/python
   2 from lxml import etree
   3 from StringIO import StringIO
   4 from sfa.util.xrn import *
   5 from sfa.rspecs.pg_rspec import PGRSpec
   6
   7 xslt='''<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   8 <xsl:output method="xml" indent="no"/>
   9
  10 <xsl:template match="/|comment()|processing-instruction()">
  11     <xsl:copy>
  12       <xsl:apply-templates/>
  13     </xsl:copy>
  14 </xsl:template>
  15
  16 <xsl:template match="*">
  17     <xsl:element name="{local-name()}">
  18       <xsl:apply-templates select="@*|node()"/>
  19     </xsl:element>
  20 </xsl:template>
  21
  22 <xsl:template match="@*">
  23     <xsl:attribute name="{local-name()}">
  24       <xsl:value-of select="."/>
  25     </xsl:attribute>
  26 </xsl:template>
  27 </xsl:stylesheet>
  28 '''
  29
  30 xslt_doc=etree.parse(StringIO(xslt))
  31 transform=etree.XSLT(xslt_doc)
  32
  33 class PGRSpecConverter:
  34
  35     @staticmethod
  36     def to_sfa_node(site, node, i=0):
  37         urn = node.get('component_uuid')
  38         hrn, _ = urn_to_hrn(urn)
  39         hostname = Xrn.urn_split(urn)[-1]
  40         node_tag = etree.SubElement(site, "node")
  41         hostname_tag = etree.SubElement(node_tag, "hostname").text = hostname
  42         urn_tag = etree.SubElement(node_tag, "urn").text = urn
  43         for child in node.getchildren():
  44             node_tag.append(transform(child).getroot())
  45
  46     @staticmethod
  47     def to_sfa_network(pg_rspec, xml):
  48         network_urn = pg_rspec.get_network()
  49         network,  _ = urn_to_hrn(network_urn)
  50         nodes = pg_rspec.get_node_elements()
  51         network_tag = etree.SubElement(xml, "network")
  52         network_tag.set("name", network)
  53         network_tag.set("id", network)
  54         i = 0
  55         for node in nodes:
  56            PGRSpecConverter.to_sfa_node(network_tag, node, i)
  57
  58     @staticmethod
  59     def to_sfa_rspec(rspec):
  60         pg_rspec = PGRSpec(rspec=rspec)
  61         header = '<?xml version="1.0"?>\n'
  62         xml = etree.Element("RSpec", type="SFA")
  63         PGRSpecConverter.to_sfa_network(pg_rspec, xml)
  64         return header + etree.tostring(xml, pretty_print=True)
  65
  66 if __name__ == '__main__':
  67    rspec = 'protogeni.rspec'
  68    print PGRSpecConverter.to_sfa_rspec(rspec)