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+"""Different kinds of SAX Exceptions"""
+import sys
+if sys.platform[:4] == "java":
+ from java.lang import Exception
+del sys
+
+# ===== SAXEXCEPTION =====
+
+class SAXException(Exception):
+ """Encapsulate an XML error or warning. This class can contain
+ basic error or warning information from either the XML parser or
+ the application: you can subclass it to provide additional
+ functionality, or to add localization. Note that although you will
+ receive a SAXException as the argument to the handlers in the
+ ErrorHandler interface, you are not actually required to raise
+ the exception; instead, you can simply read the information in
+ it."""
+
+ def __init__(self, msg, exception=None):
+ """Creates an exception. The message is required, but the exception
+ is optional."""
+ self._msg = msg
+ self._exception = exception
+ Exception.__init__(self, msg)
+
+ def getMessage(self):
+ "Return a message for this exception."
+ return self._msg
+
+ def getException(self):
+ "Return the embedded exception, or None if there was none."
+ return self._exception
+
+ def __str__(self):
+ "Create a string representation of the exception."
+ return self._msg
+
+ def __getitem__(self, ix):
+ """Avoids weird error messages if someone does exception[ix] by
+ mistake, since Exception has __getitem__ defined."""
+ raise AttributeError("__getitem__")
+
+
+# ===== SAXPARSEEXCEPTION =====
+
+class SAXParseException(SAXException):
+ """Encapsulate an XML parse error or warning.
+
+ This exception will include information for locating the error in
+ the original XML document. Note that although the application will
+ receive a SAXParseException as the argument to the handlers in the
+ ErrorHandler interface, the application is not actually required
+ to raise the exception; instead, it can simply read the
+ information in it and take a different action.
+
+ Since this exception is a subclass of SAXException, it inherits
+ the ability to wrap another exception."""
+
+ def __init__(self, msg, exception, locator):
+ "Creates the exception. The exception parameter is allowed to be None."
+ SAXException.__init__(self, msg, exception)
+ self._locator = locator
+
+ # We need to cache this stuff at construction time.
+ # If this exception is raised, the objects through which we must
+ # traverse to get this information may be deleted by the time
+ # it gets caught.
+ self._systemId = self._locator.getSystemId()
+ self._colnum = self._locator.getColumnNumber()
+ self._linenum = self._locator.getLineNumber()
+
+ def getColumnNumber(self):
+ """The column number of the end of the text where the exception
+ occurred."""
+ return self._colnum
+
+ def getLineNumber(self):
+ "The line number of the end of the text where the exception occurred."
+ return self._linenum
+
+ def getPublicId(self):
+ "Get the public identifier of the entity where the exception occurred."
+ return self._locator.getPublicId()
+
+ def getSystemId(self):
+ "Get the system identifier of the entity where the exception occurred."
+ return self._systemId
+
+ def __str__(self):
+ "Create a string representation of the exception."
+ sysid = self.getSystemId()
+ if sysid is None:
+ sysid = "<unknown>"
+ linenum = self.getLineNumber()
+ if linenum is None:
+ linenum = "?"
+ colnum = self.getColumnNumber()
+ if colnum is None:
+ colnum = "?"
+ return "%s:%s:%s: %s" % (sysid, linenum, colnum, self._msg)
+
+
+# ===== SAXNOTRECOGNIZEDEXCEPTION =====
+
+class SAXNotRecognizedException(SAXException):
+ """Exception class for an unrecognized identifier.
+
+ An XMLReader will raise this exception when it is confronted with an
+ unrecognized feature or property. SAX applications and extensions may
+ use this class for similar purposes."""
+
+
+# ===== SAXNOTSUPPORTEDEXCEPTION =====
+
+class SAXNotSupportedException(SAXException):
+ """Exception class for an unsupported operation.
+
+ An XMLReader will raise this exception when a service it cannot
+ perform is requested (specifically setting a state or value). SAX
+ applications and extensions may use this class for similar
+ purposes."""
+
+# ===== SAXNOTSUPPORTEDEXCEPTION =====
+
+class SAXReaderNotAvailable(SAXNotSupportedException):
+ """Exception class for a missing driver.
+
+ An XMLReader module (driver) should raise this exception when it
+ is first imported, e.g. when a support module cannot be imported.
+ It also may be raised during parsing, e.g. if executing an external
+ program is not permitted."""