0
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This module contains the core classes of version 2.0 of SAX for Python.
This file provides only default classes with absolutely minimum
functionality, from which drivers and applications can be subclassed.

Many of these classes are empty and are included only as documentation
of the interfaces.

$Id$
"""

version = '2.0beta'

#============================================================================
#
# HANDLER INTERFACES
#
#============================================================================

# ===== ERRORHANDLER =====

class ErrorHandler:
    """Basic interface for SAX error handlers.

    If you create an object that implements this interface, then
    register the object with your XMLReader, the parser will call the
    methods in your object to report all warnings and errors. There
    are three levels of errors available: warnings, (possibly)
    recoverable errors, and unrecoverable errors. All methods take a
    SAXParseException as the only parameter."""

    def error(self, exception):
        "Handle a recoverable error."
        raise exception

    def fatalError(self, exception):
        "Handle a non-recoverable error."
        raise exception

    def warning(self, exception):
        "Handle a warning."
        print exception


# ===== CONTENTHANDLER =====

class ContentHandler:
    """Interface for receiving logical document content events.

    This is the main callback interface in SAX, and the one most
    important to applications. The order of events in this interface
    mirrors the order of the information in the document."""

    def __init__(self):
        self._locator = None

    def setDocumentLocator(self, locator):
        """Called by the parser to give the application a locator for
        locating the origin of document events.

        SAX parsers are strongly encouraged (though not absolutely
        required) to supply a locator: if it does so, it must supply
        the locator to the application by invoking this method before
        invoking any of the other methods in the DocumentHandler
        interface.

        The locator allows the application to determine the end
        position of any document-related event, even if the parser is
        not reporting an error. Typically, the application will use
        this information for reporting its own errors (such as
        character content that does not match an application's
        business rules). The information returned by the locator is
        probably not sufficient for use with a search engine.

        Note that the locator will return correct information only
        during the invocation of the events in this interface. The
        application should not attempt to use it at any other time."""
        self._locator = locator

    def startDocument(self):
        """Receive notification of the beginning of a document.

        The SAX parser will invoke this method only once, before any
        other methods in this interface or in DTDHandler (except for
        setDocumentLocator)."""

    def endDocument(self):
        """Receive notification of the end of a document.

        The SAX parser will invoke this method only once, and it will
        be the last method invoked during the parse. The parser shall
        not invoke this method until it has either abandoned parsing
        (because of an unrecoverable error) or reached the end of
        input."""

    def startPrefixMapping(self, prefix, uri):
        """Begin the scope of a prefix-URI Namespace mapping.

        The information from this event is not necessary for normal
        Namespace processing: the SAX XML reader will automatically
        replace prefixes for element and attribute names when the
        http://xml.org/sax/features/namespaces feature is true (the
        default).

        There are cases, however, when applications need to use
        prefixes in character data or in attribute values, where they
        cannot safely be expanded automatically; the
        sta