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expatreader.pyo
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2003-12-30
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418 lines
# Source Generated with Decompyle++
# File: in.pyo (Python 2.3)
"""
SAX driver for the pyexpat C module. This driver works with
pyexpat.__version__ == '2.22'.
"""
version = '0.20'
from xml.sax._exceptions import *
from xml.sax.handler import feature_validation, feature_namespaces
from xml.sax.handler import feature_namespace_prefixes
from xml.sax.handler import feature_external_ges, feature_external_pes
from xml.sax.handler import feature_string_interning
from xml.sax.handler import property_xml_string, property_interning_dict
import sys
if sys.platform[:4] == 'java':
raise SAXReaderNotAvailable('expat not available in Java', None)
del sys
try:
from xml.parsers import expat
except ImportError:
raise SAXReaderNotAvailable('expat not supported', None)
if not hasattr(expat, 'ParserCreate'):
raise SAXReaderNotAvailable('expat not supported', None)
from xml.sax import xmlreader, saxutils, handler
AttributesImpl = xmlreader.AttributesImpl
AttributesNSImpl = xmlreader.AttributesNSImpl
try:
import _weakref
except ImportError:
def _mkproxy(o):
return o
import weakref
_mkproxy = weakref.proxy
del weakref
del _weakref
class ExpatLocator(xmlreader.Locator):
'''Locator for use with the ExpatParser class.
This uses a weak reference to the parser object to avoid creating
a circular reference between the parser and the content handler.
'''
def __init__(self, parser):
self._ref = _mkproxy(parser)
def getColumnNumber(self):
parser = self._ref
if parser._parser is None:
return None
return parser._parser.ErrorColumnNumber
def getLineNumber(self):
parser = self._ref
if parser._parser is None:
return 1
return parser._parser.ErrorLineNumber
def getPublicId(self):
parser = self._ref
if parser is None:
return None
return parser._source.getPublicId()
def getSystemId(self):
parser = self._ref
if parser is None:
return None
return parser._source.getSystemId()
class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator):
'''SAX driver for the pyexpat C module.'''
def __init__(self, namespaceHandling = 0, bufsize = 2 ** 16 - 20):
xmlreader.IncrementalParser.__init__(self, bufsize)
self._source = xmlreader.InputSource()
self._parser = None
self._namespaces = namespaceHandling
self._lex_handler_prop = None
self._parsing = 0
self._entity_stack = []
self._external_ges = 1
self._interning = None
def parse(self, source):
'''Parse an XML document from a URL or an InputSource.'''
source = saxutils.prepare_input_source(source)
self._source = source
self.reset()
self._cont_handler.setDocumentLocator(ExpatLocator(self))
xmlreader.IncrementalParser.parse(self, source)
def prepareParser(self, source):
if source.getSystemId() != None:
self._parser.SetBase(source.getSystemId())
def setContentHandler(self, handler):
xmlreader.IncrementalParser.setContentHandler(self, handler)
if self._parsing:
self._reset_cont_handler()
def getFeature(self, name):
if name == feature_namespaces:
return self._namespaces
elif name == feature_string_interning:
return self._interning is not None
elif name in (feature_validation, feature_external_pes, feature_namespace_prefixes):
return 0
elif name == feature_external_ges:
return self._external_ges
raise SAXNotRecognizedException("Feature '%s' not recognized" % name)
def setFeature(self, name, state):
if self._parsing:
raise SAXNotSupportedException('Cannot set features while parsing')
if name == feature_namespaces:
self._namespaces = state
elif name == feature_external_ges:
self._external_ges = state
elif name == feature_string_interning:
if state:
if self._interning is None:
self._interning = { }
else:
self._interning = None
elif name == feature_validation:
if state:
raise SAXNotSupportedException('expat does not support validation')
elif name == feature_external_pes:
if state:
raise SAXNotSupportedException('expat does not read external parameter entities')
elif name == feature_namespace_prefixes:
if state:
raise SAXNotSupportedException('expat does not report namespace prefixes')
else:
raise SAXNotRecognizedException("Feature '%s' not recognized" % name)
def getProperty(self, name):
if name == handler.property_lexical_handler:
return self._lex_handler_prop
elif name == property_interning_dict:
return self._interning
elif name == property_xml_string:
if self._parser:
if hasattr(self._parser, 'GetInputContext'):
return self._parser.GetInputContext()
else:
raise SAXNotRecognizedException('This version of expat does not support getting the XML string')
else:
raise SAXNotSupportedException('XML string cannot be returned when not parsing')
raise SAXNotRecognizedException("Property '%s' not recognized" % name)
def setProperty(self, name, value):
if name == handler.property_lexical_handler:
self._lex_handler_prop = value
if self._parsing:
self._reset_lex_handler_prop()
elif name == property_interning_dict:
self._interning = value
elif name == property_xml_string:
raise SAXNotSupportedException("Property '%s' cannot be set" % name)
else:
raise SAXNotRecognizedException("Property '%s' not recognized" % name)
def feed(self, data, isFinal = 0):
if not (self._parsing):
self.reset()
self._parsing = 1
self._cont_handler.startDocument()
try:
self._parser.Parse(data, isFinal)
except expat.error:
e = None
exc = SAXParseException(expat.ErrorString(e.code), e, self)
self._err_handler.fatalError(exc)
def close(self):
if self._entity_stack:
return None
self.feed('', isFinal = 1)
self._cont_handler.endDocument()
self._parsing = 0
self._parser = None
def _reset_cont_handler(self):
self._parser.ProcessingInstructionHandler = self._cont_handler.processingInstruction
self._parser.CharacterDataHandler = self._cont_handler.characters
def _reset_lex_handler_prop(self):
lex = self._lex_handler_prop
parser = self._parser
if lex is None:
parser.CommentHandler = None
parser.StartCdataSectionHandler = None
parser.EndCdataSectionHandler = None
parser.StartDoctypeDeclHandler = None
parser.EndDoctypeDeclHandler = None
else:
parser.CommentHandler = lex.comment
parser.StartCdataSectionHandler = lex.startCDATA
parser.EndCdataSectionHandler = lex.endCDATA
parser.StartDoctypeDeclHandler = self.start_doctype_decl
parser.EndDoctypeDeclHandler = lex.endDTD
def reset(self):
if self._namespaces:
self._parser = expat.ParserCreate(None, ' ', intern = self._interning)
self._parser.namespace_prefixes = 1
self._parser.StartElementHandler = self.start_element_ns
self._parser.EndElementHandler = self.end_element_ns
else:
self._parser = expat.ParserCreate(intern = self._interning)
self._parser.StartElementHandler = self.start_element
self._parser.EndElementHandler = self.end_element
self._reset_cont_handler()
self._parser.UnparsedEntityDeclHandler = self.unparsed_entity_decl
self._parser.NotationDeclHandler = self.notation_decl
self._parser.StartNamespaceDeclHandler = self.start_namespace_decl
self._parser.EndNamespaceDeclHandler = self.end_namespace_decl
self._decl_handler_prop = None
if self._lex_handler_prop:
self._reset_lex_handler_prop()
self._parser.ExternalEntityRefHandler = self.external_entity_ref
try:
self._parser.SkippedEntityHandler = self.skipped_entity_handler
except AttributeError:
pass
self._parser.SetParamEntityParsing(expat.XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE)
self._parsing = 0
self._entity_stack = []
def getColumnNumber(self):
if self._parser is None:
return None
return self._parser.ErrorColumnNumber
def getLineNumber(self):
if self._parser is None:
return 1
return self._parser.ErrorLineNumber
def getPublicId(self):
return self._source.getPublicId()
def getSystemId(self):
return self._source.getSystemId()
def start_element(self, name, attrs):
self._cont_handler.startElement(name, AttributesImpl(attrs))
def end_element(self, name):
self._cont_handler.endElement(name)
def start_element_ns(self, name, attrs):
pair = name.split()
if len(pair) == 1:
pair = (None, name)
elif len(pair) == 3:
pair = (pair[0], pair[1])
else:
pair = tuple(pair)
newattrs = { }
qnames = { }
for aname, value in attrs.items():
parts = aname.split()
length = len(parts)
if length == 1:
qname = aname
apair = (None, aname)
elif length == 3:
qname = '%s:%s' % (parts[2], parts[1])
apair = (parts[0], parts[1])
else:
qname = parts[1]
apair = tuple(parts)
newattrs[apair] = value
qnames[apair] = qname
self._cont_handler.startElementNS(pair, None, AttributesNSImpl(newattrs, qnames))
def end_element_ns(self, name):
pair = name.split()
if len(pair) == 1:
pair = (None, name)
elif len(pair) == 3:
pair = (pair[0], pair[1])
else:
pair = tuple(pair)
self._cont_handler.endElementNS(pair, None)
def processing_instruction(self, target, data):
self._cont_handler.processingInstruction(target, data)
def character_data(self, data):
self._cont_handler.characters(data)
def start_namespace_decl(self, prefix, uri):
self._cont_handler.startPrefixMapping(prefix, uri)
def end_namespace_decl(self, prefix):
self._cont_handler.endPrefixMapping(prefix)
def start_doctype_decl(self, name, pubid, sysid, has_internal_subset):
self._lex_handler_prop.startDTD(name, pubid, sysid)
def unparsed_entity_decl(self, name, base, sysid, pubid, notation_name):
self._dtd_handler.unparsedEntityDecl(name, pubid, sysid, notation_name)
def notation_decl(self, name, base, sysid, pubid):
self._dtd_handler.notationDecl(name, pubid, sysid)
def external_entity_ref(self, context, base, sysid, pubid):
if not (self._external_ges):
return 1
source = self._ent_handler.resolveEntity(pubid, sysid)
if not self._source.getSystemId():
pass
source = saxutils.prepare_input_source(source, '')
self._entity_stack.append((self._parser, self._source))
self._parser = self._parser.ExternalEntityParserCreate(context)
self._source = source
try:
xmlreader.IncrementalParser.parse(self, source)
except:
return 0
(self._parser, self._source) = self._entity_stack[-1]
del self._entity_stack[-1]
return 1
def skipped_entity_handler(self, name, is_pe):
if is_pe:
name = '%' + name
self._cont_handler.skippedEntity(name)
def create_parser(*args, **kwargs):
return ExpatParser(*args, **kwargs)
if __name__ == '__main__':
import xml.sax as xml
p = create_parser()
p.setContentHandler(xml.sax.XMLGenerator())
p.setErrorHandler(xml.sax.ErrorHandler())
p.parse('../../../hamlet.xml')