home *** CD-ROM | disk | FTP | other *** search
- """Simple API for XML (SAX) implementation for Python.
-
- This module provides an implementation of the SAX 2 interface;
- information about the Java version of the interface can be found at
- http://www.megginson.com/SAX/. The Python version of the interface is
- documented at <...>.
-
- This package contains the following modules:
-
- handler -- Base classes and constants which define the SAX 2 API for
- the 'client-side' of SAX for Python.
-
- saxutils -- Implementation of the convenience classes commonly used to
- work with SAX.
-
- xmlreader -- Base classes and constants which define the SAX 2 API for
- the parsers used with SAX for Python.
-
- expatreader -- Driver that allows use of the Expat parser with SAX.
- """
-
- from xmlreader import InputSource
- from handler import ContentHandler, ErrorHandler
- from _exceptions import SAXException, SAXNotRecognizedException, \
- SAXParseException, SAXNotSupportedException, \
- SAXReaderNotAvailable
-
-
- def parse(source, handler, errorHandler=ErrorHandler()):
- parser = make_parser()
- parser.setContentHandler(handler)
- parser.setErrorHandler(errorHandler)
- parser.parse(source)
-
- def parseString(string, handler, errorHandler=ErrorHandler()):
- try:
- from cStringIO import StringIO
- except ImportError:
- from StringIO import StringIO
-
- if errorHandler is None:
- errorHandler = ErrorHandler()
- parser = make_parser()
- parser.setContentHandler(handler)
- parser.setErrorHandler(errorHandler)
-
- inpsrc = InputSource()
- inpsrc.setByteStream(StringIO(string))
- parser.parse(inpsrc)
-
- # this is the parser list used by the make_parser function if no
- # alternatives are given as parameters to the function
-
- default_parser_list = ["xml.sax.expatreader"]
-
- # tell modulefinder that importing sax potentially imports expatreader
- _false = 0
- if _false:
- import xml.sax.expatreader
-
- import os, sys
- if os.environ.has_key("PY_SAX_PARSER"):
- default_parser_list = os.environ["PY_SAX_PARSER"].split(",")
- del os
-
- _key = "python.xml.sax.parser"
- if sys.platform[:4] == "java" and sys.registry.containsKey(_key):
- default_parser_list = sys.registry.getProperty(_key).split(",")
-
-
- def make_parser(parser_list = []):
- """Creates and returns a SAX parser.
-
- Creates the first parser it is able to instantiate of the ones
- given in the list created by doing parser_list +
- default_parser_list. The lists must contain the names of Python
- modules containing both a SAX parser and a create_parser function."""
-
- for parser_name in parser_list + default_parser_list:
- try:
- return _create_parser(parser_name)
- except ImportError,e:
- import sys
- if sys.modules.has_key(parser_name):
- # The parser module was found, but importing it
- # failed unexpectedly, pass this exception through
- raise
- except SAXReaderNotAvailable:
- # The parser module detected that it won't work properly,
- # so try the next one
- pass
-
- raise SAXReaderNotAvailable("No parsers found", None)
-
- # --- Internal utility methods used by make_parser
-
- if sys.platform[ : 4] == "java":
- def _create_parser(parser_name):
- from org.python.core import imp
- drv_module = imp.importName(parser_name, 0, globals())
- return drv_module.create_parser()
-
- else:
- def _create_parser(parser_name):
- drv_module = __import__(parser_name,{},{},['create_parser'])
- return drv_module.create_parser()
-
- del sys
-