def parse_query(self, xml_dom_query_node, caltype, inputf ):
'''
Parses a query from XML Calibration File and returns a Calibration
request event with the corresponding information. Unfinished: priority
parsing value
@param xml_dom_query_node: a query XML Dom Node; ie <DOM Element: query at 0x921392c>
@type xml_dom_query_node: Dom Element
@param caltype: Calibration, ie bias, flat, dark, etc.
@type caltype: string
@param input: an input fits URI
@type input: string
@return: Returns a Calibration Request Event.
@rtype: CalibrationRequestEvent
'''
import Descriptors # bad to load on import, import mess
calReqEvent = CalibrationRequest()
calReqEvent.caltype = caltype
query = xml_dom_query_node
if not query.hasAttribute("id"):
raise "Improperly formed. QUERY needs an id, for example 'bias'."
tempcal = str(query.getAttribute("id"))
if( tempcal != caltype ):
raise "The id in the query does not match the caltype '"+tempcal+"' '"+str(caltype)+"'."
if type( inputf ) == AstroData:
ad = inputf
elif type( inputf ) == str:
ad = AstroData( inputf )
else:
raise RuntimeError("Bad Argument: Wrong Type, '%(val)s' '%(typ)s'." %{'val':str(inputf),'typ':str(type(inputf))})
desc = Descriptors.get_calculator( ad )
#===============================================================
# IDENTIFIERS
#===============================================================
identifiers = query.getElementsByTagName( "identifier" )
if len( identifiers ) > 0:
identifiers = identifiers[0]
else:
raise "Improperly formed. XML calibration has no identifiers."
for child in identifiers.getElementsByTagName( "property" ):
#creates dictionary object with multiple values
temp = self.parse_property(child, desc, ad)
#print "CDL112:", temp
calReqEvent.identifiers.update( temp )
#===============================================================
# CRITERIA
#===============================================================
criteria = query.getElementsByTagName( "criteria" )
if len( criteria ) > 0:
criteria = criteria[0]
else:
raise "Improperly formed. XML calibration has no criteria"
#print 'Locating a %s for %s.' %(str(caltype), str(ad.filename))
#print 'Using the following criteria:'
for child in criteria.getElementsByTagName( "property" ):
crit = self.parse_property( child, desc, ad )
calReqEvent.criteria.update( crit )
# print self.str_property( crit )
#===============================================================
# PRIORITIES
#===============================================================
priorities = query.getElementsByTagName( "priorities" )
if len( priorities ) > 0:
priorities = priorities[0]
else:
raise "Improperly formed. XML calibration has no priorities"
for child in priorities.getElementsByTagName( "property" ):
calReqEvent.priorities.update( self.parse_property(child, desc, ad) )
calReqEvent.filename = inputf
return calReqEvent
