geometryXMLparser.py

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#!/usr/bin/env python

# XML must come from MuonGeometryDBConverter; not hand-made
# Example configuration that will work
# 
# PSet outputXML = {
#     string fileName = "tmp.xml"
#     string relativeto = "container"   # keep in mind which relativeto you used when interpreting positions and angles!
#     bool survey = false               # important: survey must be false
#     bool rawIds = false               # important: rawIds must be false
#     bool eulerAngles = false
#     int32 precision = 10
# }

def dtorder(a, b):
  for ai, bi, name in zip(list(a) + [0]*(5 - len(a)), \
                          list(b) + [0]*(5 - len(b)), \
                          ("wheel", "station", "sector", "superlayer", "layer")):
    exec("a%s = %d" % (name, ai))
    exec("b%s = %d" % (name, bi))

  if awheel == bwheel and astation == bstation:

    if asector != bsector:
      if astation == 4: sectororder = [0, 1, 2, 3, 4, 13, 5, 6, 7, 8, 9, 10, 14, 11, 12]
      elif awheel == 0: sectororder = [0, 1, 5, 9, 2, 6, 10, 3, 7, 11, 4, 8, 12]
      else: sectororder = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
      return cmp(sectororder.index(asector), sectororder.index(bsector))

    elif asuperlayer != bsuperlayer:
      superlayerorder = [0, 1, 3, 2]
      return cmp(superlayerorder.index(asuperlayer), superlayerorder.index(bsuperlayer))

  return cmp(a, b)

def cscorder(a, b):
  for ai, bi, name in zip(list(a) + [0]*(5 - len(a)), \
                          list(b) + [0]*(5 - len(b)), \
                          ("endcap", "station", "ring", "chamber", "layer")):
    exec("a%s = %d" % (name, ai))
    exec("b%s = %d" % (name, bi))

  if astation == 1 and aring == 3: return cmp(a, b)

  elif aendcap == bendcap and astation == bstation and aring == bring and achamber != bchamber:
    if achamber == 0: return -1 # upper hierarchy comes first
    if bchamber == 0: return  1 # upper hierarchy comes first
    if achamber % 2 == 1 and bchamber % 2 == 0: return -1  # odds come first
    elif achamber % 2 == 0 and bchamber % 2 == 1: return 1 # evens come after

  return cmp(a, b)

# External libraries (standard in Python >= 2.4, at least)
import xml.sax

class Alignable:
    def pos(self):
        return self.x, self.y, self.z
    def covariance(self):
        return (self.xx, self.xy, self.xz, self.xa, self.xb, self.xc), (self.xy, self.yy, self.yz, self.ya, self.yb, self.yc), (self.xz, self.yz, self.zz, self.za, self.zb, self.zc), (self.xa, self.ya, self.za, self.aa, self.ab, self.ac), (self.xb, self.yb, self.zb, self.ab, self.bb, self.bc), (self.xc, self.yc, self.zc, self.ac, self.ac, self.cc)

class DTAlignable:
    def index(self):
        i = []
        try: i.append(self.wheel)
        except AttributeError: pass
        try: i.append(self.station)
        except AttributeError: pass
        try: i.append(self.sector)
        except AttributeError: pass
        try: i.append(self.superlayer)
        except AttributeError: pass
        try: i.append(self.layer)
        except AttributeError: pass
        return tuple(i)

class CSCAlignable:
    def index(self):
        i = []
        try: i.append(self.endcap)
        except AttributeError: pass
        try: i.append(self.station)
        except AttributeError: pass
        try: i.append(self.ring)
        except AttributeError: pass
        try: i.append(self.chamber)
        except AttributeError: pass
        try: i.append(self.layer)
        except AttributeError: pass
        return tuple(i)

class Operation:
    def __init__(self):
        self.chambers = []
        self.setposition = {}
        self.setape = {}

# This class is a subclass of something which knows how to parse XML
class MuonGeometry(xml.sax.handler.ContentHandler):
    def __init__(self, stream=None):
        self.dt = {}
        self.csc = {}
        self._operation = None

        if stream is not None:
          parser = xml.sax.make_parser()
          parser.setContentHandler(self)
          parser.parse(stream)

    # what to do when you get to a <startelement>
    def startElement(self, tag, attrib):
        attrib = dict(attrib.items())
        if "rawId" in attrib: raise Exception("Please use \"rawIds = false\"")
        if "aa" in attrib: raise Exception("Please use \"survey = false\"")

        if tag == "MuonAlignment": pass

        elif tag == "collection": raise NotImplementedError("<collection /> and <collection> blocks aren't implemented yet")

        elif tag == "operation":
            self._operation = Operation()

        elif self._operation is None: raise Exception("All chambers and positions must be enclosed in <operation> blocks")

        elif tag == "setposition":
            self._operation.setposition["relativeto"] = str(attrib["relativeto"])

            for name in "x", "y", "z":
                self._operation.setposition[name] = float(attrib[name])
            try:
                for name in "phix", "phiy", "phiz":
                    self._operation.setposition[name] = float(attrib[name])
            except KeyError:
                for name in "alpha", "beta", "gamma":
                    self._operation.setposition[name] = float(attrib[name])

        elif tag == "setape":
            for name in "xx", "xy", "xz", "xa", "xb", "xc", "yy", "yz", "ya", "yb", "yc", "zz", "za", "zb", "zc", "aa", "ab", "ac", "bb", "bc", "cc":
                self._operation.setposition[name] = float(attrib[name])

        elif tag[0:2] == "DT":
            alignable = DTAlignable()
            for name in "wheel", "station", "sector", "superlayer", "layer":
                if name in attrib:
                    alignable.__dict__[name] = int(attrib[name])
            self._operation.chambers.append(alignable)

        # <CSC...>: print endcap/station/ring/chamber/layer
        elif tag[0:3] == "CSC":
            alignable = CSCAlignable()
            for name in "endcap", "station", "ring", "chamber", "layer":
                if name in attrib:
                    alignable.__dict__[name] = int(attrib[name])
            self._operation.chambers.append(alignable)

    # what to do when you get to an </endelement>
    def endElement(self, tag):
        if tag == "operation":
            if self._operation is None: raise Exception("Unbalanced <operation></operation>")
            for c in self._operation.chambers:
                c.__dict__.update(self._operation.setposition)
                c.__dict__.update(self._operation.setape)
                if isinstance(c, DTAlignable): self.dt[c.index()] = c
                elif isinstance(c, CSCAlignable): self.csc[c.index()] = c

    # writing back to xml
    def xml(self, stream=None, precision=10):
      if precision == None: format = "%g"
      else: format = "%." + str(precision) + "f"

      if stream == None:
        output = []
        writeline = lambda x: output.append(x)
      else:
        writeline = lambda x: stream.write(x)

      writeline("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
      writeline("<?xml-stylesheet type=\"text/xml\" href=\"MuonAlignment.xsl\"?>\n")
      writeline("<MuonAlignment>\n\n")

      dtkeys = self.dt.keys()
      dtkeys.sort(dtorder)
      csckeys = self.csc.keys()
      csckeys.sort(cscorder)

      def f(number): return format % number

      def position_ape(ali, attributes):
        writeline("  <%s%s />\n" % (level, attributes))
        writeline("  <setposition relativeto=\"%s\" x=\"%s\" y=\"%s\" z=\"%s\" phix=\"%s\" phiy=\"%s\" phiz=\"%s\" />\n" % \
                  (ali.relativeto, f(ali.x), f(ali.y), f(ali.z), f(ali.phix), f(ali.phiy), f(ali.phiz)))

        if "xx" in ali.__dict__:
          writeline("  <setape xx=\"%s\" xy=\"%s\" xz=\"%s\" xa=\"%s\" xb=\"%s\" xc=\"%s\" yy=\"%s\" yz=\"%s\" ya=\"%s\" yb=\"%s\" yc=\"%s\" zz=\"%s\" za=\"%s\" zb=\"%s\" zc=\"%s\" aa=\"%s\" ab=\"%s\" ac=\"%s\" bb=\"%s\" bc=\"%s\" cc=\"%s\" />\n" % \
                    (f(ali.xx), f(ali.xy), f(ali.xz), f(ali.xa), f(ali.xb), f(ali.xc), f(ali.yy), f(ali.yz), f(ali.ya), f(ali.yb), f(ali.yc), f(ali.zz), f(ali.za), f(ali.zb), f(ali.zc), f(ali.aa), f(ali.ab), f(ali.ac), f(ali.bb), f(ali.bc), f(ali.cc)))

      for key in dtkeys:
        writeline("<operation>\n")

        if len(key) == 0: level = "DTBarrel"
        elif len(key) == 1: level = "DTWheel "
        elif len(key) == 2: level = "DTStation "
        elif len(key) == 3: level = "DTChamber "
        elif len(key) == 4: level = "DTSuperLayer "
        elif len(key) == 5: level = "DTLayer "

        ali = self.dt[key]
        attributes = " ".join(["%s=\"%d\"" % (name, value) for name, value in zip(("wheel", "station", "sector", "superlayer", "layer"), key)])
        position_ape(ali, attributes)

        writeline("</operation>\n\n")

      for key in csckeys:
        writeline("<operation>\n")

        if len(key) == 1: level = "CSCEndcap "
        elif len(key) == 2: level = "CSCStation "
        elif len(key) == 3: level = "CSCRing "
        elif len(key) == 4: level = "CSCChamber "
        elif len(key) == 5: level = "CSCLayer "

        ali = self.csc[key]
        attributes = " ".join(["%s=\"%d\"" % (name, value) for name, value in zip(("endcap", "station", "ring", "chamber", "layer"), key)])
        position_ape(ali, attributes)

        writeline("</operation>\n\n")

      writeline("</MuonAlignment>\n")
      if stream == None: return "".join(output)