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#!/usr/bin/python
# Copyright 2006-2007 Nanorex, Inc. See LICENSE file for details.
"""This class should represent an MMP file as an abstract data object.
We can read it in from a conventional *.mmp text file, and if we wish,
write it out in some kind of XML format.
XML has many flaws, but it's got some big benefits. It's popular and
there are parsers and generators in every language. XML files are
unambiguous; once you have a DTD or schema their validity is never in
question. We might be smart to define a DTD or schema for the XML
version of the MMP file, and keep it under CVS control.
"""
import types
DEBUG = False
RecordTypes = ( )
class Mismatch(Exception):
pass
class Record:
def __init__(self):
self.children = [ ]
def __repr__(self, depth=0):
r = self.__class__.__name__
if hasattr(self, "name"):
r += " " + self.name
for c in self.children:
r += "\n" + ((depth + 1) * " ") + c.__repr__(depth+1)
return r
def matches(self, line, pattern):
if not line.startswith(pattern):
raise Mismatch, pattern + ":::" + line
return line[len(pattern):]
def processFirstLine(self, line):
pass
def read(self, lines, depth=0):
lines = self.readFirstLine(lines, depth)
if DEBUG:
print (depth * " ") + self.keyword
if hasattr(self, "bairns"):
return self.readRemainingLines(lines, depth)
else:
return lines
def readFirstLine(self, lines, depth):
#if DEBUG: print self, "FIRST LINE", lines[0][:-1]
if len(lines) < 1:
raise Mismatch, "no lines left"
firstline = lines[0]
firstline = self.matches(firstline,
self.keyword + " ")
self.processFirstLine(firstline)
return lines[1:]
def readRemainingLines(self, lines, depth):
while lines:
#if DEBUG: print self, "NEXT LINE", lines[0][:-1]
if hasattr(self, "endline"):
if lines[0].startswith(getattr(self, "endline")):
return lines[1:]
found = False
for rtype in self.bairns:
try:
newRecord = rtype()
lines = newRecord.read(lines, depth+1)
self.children.append(newRecord)
found = True
break
except Mismatch:
pass
if not found:
if depth == 0:
print "?", lines[0]
lines = lines[1:]
else:
return lines
class TemperatureRecord(Record):
keyword = "kelvin"
pass
class GroupRecord(Record):
keyword = "group"
def processFirstLine(self, line):
self.name = line.strip()
pass
class InformationRecord(Record):
keyword = "info"
pass
class CoordinateSystemRecord(Record):
keyword = "csys"
pass
class MoleculeRecord(Record):
keyword = "mol"
def processFirstLine(self, line):
self.name = line.strip()
pass
class AtomRecord(Record):
keyword = "atom"
pass
class Bond1Record(Record):
keyword = "bond1"
pass
class MmpFile(Record):
keyword = "mmpformat"
MmpFile.bairns = (TemperatureRecord,
GroupRecord)
MmpFile.endline = "end molecular machine part"
GroupRecord.bairns = (InformationRecord,
CoordinateSystemRecord,
MoleculeRecord)
GroupRecord.endline = "egroup"
MoleculeRecord.bairns = (AtomRecord,)
AtomRecord.bairns = (Bond1Record,)
examples = [
"../../../partlib/bearings/BigBearing.mmp",
"../../../partlib/bearings/BuckyBearing.mmp",
"../../../partlib/bearings/HCBearing.mmp",
"../../../partlib/bearings/SmallBearing.mmp",
"../../../partlib/bearings/ThrustBearing.mmp"
]
for e in examples:
print "#############"
print e
lines = open(e).readlines()
m = MmpFile()
m.read(lines)
print m
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