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from notmuch2 import _capi as capi
class NotmuchError(Exception):
"""Base exception for errors originating from the notmuch library.
Usually this will have two attributes:
:status: This is a numeric status code corresponding to the error
code in the notmuch library. This is normally fairly
meaningless, it can also often be ``None``. This exists mostly
to easily create new errors from notmuch status codes and
should not normally be used by users.
:message: A user-facing message for the error. This can
occasionally also be ``None``. Usually you'll want to call
``str()`` on the error object instead to get a sensible
message.
"""
@classmethod
def exc_type(cls, status):
"""Return correct exception type for notmuch status."""
types = {
capi.lib.NOTMUCH_STATUS_OUT_OF_MEMORY:
OutOfMemoryError,
capi.lib.NOTMUCH_STATUS_READ_ONLY_DATABASE:
ReadOnlyDatabaseError,
capi.lib.NOTMUCH_STATUS_XAPIAN_EXCEPTION:
XapianError,
capi.lib.NOTMUCH_STATUS_FILE_ERROR:
FileError,
capi.lib.NOTMUCH_STATUS_FILE_NOT_EMAIL:
FileNotEmailError,
capi.lib.NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID:
DuplicateMessageIdError,
capi.lib.NOTMUCH_STATUS_NULL_POINTER:
NullPointerError,
capi.lib.NOTMUCH_STATUS_TAG_TOO_LONG:
TagTooLongError,
capi.lib.NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW:
UnbalancedFreezeThawError,
capi.lib.NOTMUCH_STATUS_UNBALANCED_ATOMIC:
UnbalancedAtomicError,
capi.lib.NOTMUCH_STATUS_UNSUPPORTED_OPERATION:
UnsupportedOperationError,
capi.lib.NOTMUCH_STATUS_UPGRADE_REQUIRED:
UpgradeRequiredError,
capi.lib.NOTMUCH_STATUS_PATH_ERROR:
PathError,
capi.lib.NOTMUCH_STATUS_ILLEGAL_ARGUMENT:
IllegalArgumentError,
capi.lib.NOTMUCH_STATUS_NO_CONFIG:
NoConfigError,
capi.lib.NOTMUCH_STATUS_NO_DATABASE:
NoDatabaseError,
capi.lib.NOTMUCH_STATUS_DATABASE_EXISTS:
DatabaseExistsError,
capi.lib.NOTMUCH_STATUS_BAD_QUERY_SYNTAX:
QuerySyntaxError,
}
return types[status]
def __new__(cls, *args, **kwargs):
"""Return the correct subclass based on status."""
# This is simplistic, but the actual __init__ will fail if the
# signature is wrong anyway.
if args:
status = args[0]
else:
status = kwargs.get('status', None)
if status and cls == NotmuchError:
exc = cls.exc_type(status)
return exc.__new__(exc, *args, **kwargs)
else:
return super().__new__(cls)
def __init__(self, status=None, message=None):
self.status = status
self.message = message
def __str__(self):
if self.message:
return self.message
elif self.status:
char_str = capi.lib.notmuch_status_to_string(self.status)
return capi.ffi.string(char_str).decode(errors='replace')
else:
return 'Unknown error'
class OutOfMemoryError(NotmuchError): pass
class ReadOnlyDatabaseError(NotmuchError): pass
class XapianError(NotmuchError): pass
class FileError(NotmuchError): pass
class FileNotEmailError(NotmuchError): pass
class DuplicateMessageIdError(NotmuchError): pass
class NullPointerError(NotmuchError): pass
class TagTooLongError(NotmuchError): pass
class UnbalancedFreezeThawError(NotmuchError): pass
class UnbalancedAtomicError(NotmuchError): pass
class UnsupportedOperationError(NotmuchError): pass
class UpgradeRequiredError(NotmuchError): pass
class PathError(NotmuchError): pass
class IllegalArgumentError(NotmuchError): pass
class NoConfigError(NotmuchError): pass
class NoDatabaseError(NotmuchError): pass
class DatabaseExistsError(NotmuchError): pass
class QuerySyntaxError(NotmuchError): pass
class ObjectDestroyedError(NotmuchError):
"""The object has already been destroyed and it's memory freed.
This occurs when :meth:`destroy` has been called on the object but
you still happen to have access to the object. This should not
normally occur since you should never call :meth:`destroy` by
hand.
"""
def __str__(self):
if self.message:
return self.message
else:
return 'Memory already freed'
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