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# author: Andreas Vox, May 2012
from xml.etree.ElementTree import ElementTree
import os
from impldescription import *
class RNG_Parser(object):
def __init__(self, dir):
self.basedir = dir
self.definitions = {}
self.refnames = {}
self.imports = {}
self.classes = []
self.currentClass = None
def parsePattern(self, pattern, isOptional, isCollection):
if pattern.tag == qn('element'):
if pattern.get(an('impl:type')) == "ignore":
pass;
elif pattern.get(an('impl:template')) != None:
c = self.currentClass
self.currentClass = Class(pattern)
self.classes.append(self.currentClass)
self.parsePatterns(pattern.getchildren(), False, False)
self.currentClass = c
elif self.currentClass != None:
newProp = Property(pattern, isOptional, isCollection)
if newProp.datatype is None:
ref = pattern.getchildren()[0]
if ref.tag == qn('rng:ref'):
newProp.refname = ref.get(an('name'))
self.currentClass.properties.append(newProp)
else:
self.parsePatterns(pattern.getchildren(), isOptional, isCollection)
elif pattern.tag == qn('attribute'):
if pattern.get(an('impl:type')) == "ignore":
pass;
elif self.currentClass != None:
self.currentClass.properties.append(Property(pattern, isOptional, isCollection))
elif pattern.tag == qn('group'):
self.parsePatterns(pattern.getchildren(), isOptional, isCollection)
elif pattern.tag == qn('interleave'):
self.parsePatterns(pattern.getchildren(), isOptional, isCollection)
elif pattern.tag == qn('choice'):
self.parsePatterns(pattern.getchildren(), True, isCollection)
elif pattern.tag == qn('optional'):
self.parsePatterns(pattern.getchildren(), True, isCollection)
elif pattern.tag == qn('zeroOrMore'):
self.parsePatterns(pattern.getchildren(), isOptional, True)
elif pattern.tag == qn('oneOrMore'):
self.parsePatterns(pattern.getchildren(), isOptional, True)
elif pattern.tag == qn('list'):
raise NotImplementedError
elif pattern.tag == qn('mixed'):
self.parsePatterns(pattern.getchildren(), isOptional, isCollection)
elif pattern.tag == qn('ref'):
if pattern.get(an('impl:type')) != "ignore":
self.parsePatterns(self.definitions[pattern.get(an('name'))], isOptional, isCollection)
elif pattern.tag == qn('parentRef'):
if pattern.get(an('impl:type')) != "ignore":
self.parsePatterns(self.definitions[pattern.get(an('name'))], isOptional, isCollection)
elif pattern.tag == qn('empty'):
pass
elif pattern.tag == qn('text'):
pass
elif pattern.tag == qn('value'):
raise NotImplementedError
elif pattern.tag == qn('data'):
raise NotImplementedError
elif pattern.tag == qn('notAllowed'):
pass
elif pattern.tag == qn('externalRef'):
raise NotImplementedError
elif pattern.tag == qn('grammar'):
self.parseGrammar(pattern.getchildren())
elif pattern.tag == qn('impl:import'):
self.parseImport(pattern)
else:
pass
def parseImport(self, pattern):
self.imports[pattern.get(an('impl:datatype'))] = pattern.get(an('impl:headerfile'))
def parsePatterns(self, patterns, isOptional, isCollection):
for p in patterns:
self.parsePattern(p, isOptional, isCollection)
def parseGrammar(self, grammar):
for rule in grammar:
if rule.tag == qn('define'):
self.parseDefine(rule)
elif rule.tag == qn('start'):
self.parsePatterns(rule.getchildren(), False, False)
elif rule.tag == qn('div'):
self.parseGrammar(rule)
elif rule.tag == qn('include'):
xgrammar = ElementTree()
file = os.path.join(self.basedir, rule.get(an('href')))
xgrammar.parse(file)
self.parseGrammar(xgrammar.getroot())
elif rule.tag == qn('impl:import'):
self.parseImport(rule)
else:
raise NotImplementedError
def parseDefine(self, rule):
self.definitions[rule.get(an('name'))] = rule.getchildren()
if rule.get(an('impl:type')) == "ignore":
pass
elif rule.get(an('impl:template')) != None:
c = self.currentClass
self.currentClass = Class(rule)
self.refnames[rule.get(an('name'))] = self.currentClass
self.classes.append(self.currentClass)
self.parsePatterns(rule.getchildren(), False, False)
self.currentClass = c
else:
self.parsePatterns(rule.getchildren(), False, False)
def dumpTree(i, tree):
print i*" " + tree.tag + " " + str(tree.attrib) + " " + repr(tree.text)
for e in tree.getchildren():
dumpTree(i+1, e)
def testParser(file):
self.spec = ElementTree()
spec.parse(file)
x = RNG_Parser(os.path.dirname(file))
x.parsePattern(spec.getroot(), False, False)
for c in x.classes:
x.imports[c.datatype] = c.name + ".h"
for c in x.classes:
c.addIncludes(x.imports, x.refnames)
for c in x.classes:
print "%s (%s) TEMPL %s" % (c.name, c.datatype, c.template)
print "\t#imports", c.includes
print "\tclass", c.classreferences, ";"
print " Properties:"
for p in c.properties:
print "\t%s (%s) %s\t|%s|\t INIT %s" % (p.name, p.datatype, "OPT" if p.optional else "", p.type, p.initial)
def testmain():
import sys
import os
rncfile = sys.argv[1]
rngfile = rncfile[:-4] + ".rng"
cwd = os.path.dirname(sys.argv[0])
err = os.system("java -jar %s/../trang/trang.jar %s %s" % (cwd, rncfile, rngfile))
if err != 0:
print "aborting"
exit(err)
testParser(rngfile)
#testmain()
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