Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
"""
-
-from ctypes import CDLL, c_char_p, c_int
-from ctypes.util import find_library
+import sys
+from ctypes import CDLL, c_char_p, c_int, Structure, POINTER
#-----------------------------------------------------------------------------
#package-global instance of the notmuch library
try:
- nmlib = CDLL("libnotmuch.so.1")
+ nmlib = CDLL("libnotmuch.so.2")
except:
raise ImportError("Could not find shared 'notmuch' library.")
+if sys.version_info[0] == 2:
+ class Python3StringMixIn(object):
+ def __str__(self):
+ return unicode(self).encode('utf-8')
+
+
+ def _str(value):
+ """Ensure a nicely utf-8 encoded string to pass to libnotmuch
+
+ C++ code expects strings to be well formatted and
+ unicode strings to have no null bytes."""
+ if not isinstance(value, basestring):
+ raise TypeError("Expected str or unicode, got %s" % type(value))
+ if isinstance(value, unicode):
+ return value.encode('UTF-8')
+ return value
+else:
+ class Python3StringMixIn(object):
+ def __str__(self):
+ return self.__unicode__()
+
+
+ def _str(value):
+ """Ensure a nicely utf-8 encoded string to pass to libnotmuch
+
+ C++ code expects strings to be well formatted and
+ unicode strings to have no null bytes."""
+ if not isinstance(value, str):
+ raise TypeError("Expected str, got %s" % type(value))
+ return value.encode('UTF-8')
+
+
class Enum(object):
"""Provides ENUMS as "code=Enum(['a','b','c'])" where code.a=0 etc..."""
def __init__(self, names):
@classmethod
def status2str(self, status):
- """Get a string representation of a notmuch_status_t value."""
+ """Get a (unicode) string representation of a notmuch_status_t value."""
# define strings for custom error messages
if status == STATUS.NOT_INITIALIZED:
return "Operation on uninitialized object impossible."
- return str(Status._status2str(status))
+ return unicode(Status._status2str(status))
STATUS = Status(['SUCCESS',
'OUT_OF_MEMORY',
STATUS.__name__ = 'STATUS'
-class NotmuchError(Exception):
+class NotmuchError(Exception, Python3StringMixIn):
+ """Is initiated with a (notmuch.STATUS[, message=None]). It will not
+ return an instance of the class NotmuchError, but a derived instance
+ of a more specific Error Message, e.g. OutOfMemoryError. Each status
+ but SUCCESS has a corresponding subclassed Exception."""
+
+ @classmethod
+ def get_exc_subclass(cls, status):
+ """Returns a fine grained Exception() type,
+ detailing the error status"""
+ subclasses = {
+ STATUS.OUT_OF_MEMORY: OutOfMemoryError,
+ STATUS.READ_ONLY_DATABASE: ReadOnlyDatabaseError,
+ STATUS.XAPIAN_EXCEPTION: XapianError,
+ STATUS.FILE_ERROR: FileError,
+ STATUS.FILE_NOT_EMAIL: FileNotEmailError,
+ STATUS.DUPLICATE_MESSAGE_ID: DuplicateMessageIdError,
+ STATUS.NULL_POINTER: NullPointerError,
+ STATUS.TAG_TOO_LONG: TagTooLongError,
+ STATUS.UNBALANCED_FREEZE_THAW: UnbalancedFreezeThawError,
+ STATUS.UNBALANCED_ATOMIC: UnbalancedAtomicError,
+ STATUS.NOT_INITIALIZED: NotInitializedError,
+ }
+ assert 0 < status <= len(subclasses)
+ return subclasses[status]
+
+ def __new__(cls, *args, **kwargs):
+ """Return a correct subclass of NotmuchError if needed
+
+ We return a NotmuchError instance if status is None (or 0) and a
+ subclass that inherits from NotmuchError depending on the
+ 'status' parameter otherwise."""
+ # get 'status'. Passed in as arg or kwarg?
+ status = args[0] if len(args) else kwargs.get('status', None)
+ # no 'status' or cls is subclass already, return 'cls' instance
+ if not status or cls != NotmuchError:
+ return super(NotmuchError, cls).__new__(cls)
+ subclass = cls.get_exc_subclass(status) # which class to use?
+ return subclass.__new__(subclass, *args, **kwargs)
+
def __init__(self, status=None, message=None):
- """Is initiated with a (notmuch.STATUS[,message=None])"""
- super(NotmuchError, self).__init__(message, status)
+ self.status = status
+ self.message = message
- def __str__(self):
- if self.args[0] is not None:
- return self.args[0]
+ def __unicode__(self):
+ if self.message is not None:
+ return self.message
+ elif self.status is not None:
+ return STATUS.status2str(self.status)
else:
- return STATUS.status2str(self.args[1])
+ return 'Unknown error'
-def _str(value):
- """Ensure a nicely utf-8 encoded string to pass to libnotmuch
- C++ code expects strings to be well formatted and
- unicode strings to have no null bytes."""
- if not isinstance(value, basestring):
- raise TypeError("Expected str or unicode, got %s" % str(type(value)))
- if isinstance(value, unicode):
- return value.encode('UTF-8')
- return value
+# List of Subclassed exceptions that correspond to STATUS values and are
+# subclasses of NotmuchError.
+class OutOfMemoryError(NotmuchError):
+ status = STATUS.OUT_OF_MEMORY
+
+
+class ReadOnlyDatabaseError(NotmuchError):
+ status = STATUS.READ_ONLY_DATABASE
+
+
+class XapianError(NotmuchError):
+ status = STATUS.XAPIAN_EXCEPTION
+
+
+class FileError(NotmuchError):
+ status = STATUS.FILE_ERROR
+
+
+class FileNotEmailError(NotmuchError):
+ status = STATUS.FILE_NOT_EMAIL
+
+
+class DuplicateMessageIdError(NotmuchError):
+ status = STATUS.DUPLICATE_MESSAGE_ID
+
+
+class NullPointerError(NotmuchError):
+ status = STATUS.NULL_POINTER
+
+
+class TagTooLongError(NotmuchError):
+ status = STATUS.TAG_TOO_LONG
+
+
+class UnbalancedFreezeThawError(NotmuchError):
+ status = STATUS.UNBALANCED_FREEZE_THAW
+
+
+class UnbalancedAtomicError(NotmuchError):
+ status = STATUS.UNBALANCED_ATOMIC
+
+
+class NotInitializedError(NotmuchError):
+ """Derived from NotmuchError, this occurs if the underlying data
+ structure (e.g. database is not initialized (yet) or an iterator has
+ been exhausted. You can test for NotmuchError with .status =
+ STATUS.NOT_INITIALIZED"""
+ status = STATUS.NOT_INITIALIZED
+
+
+class NotmuchDatabaseS(Structure):
+ pass
+NotmuchDatabaseP = POINTER(NotmuchDatabaseS)
+
+
+class NotmuchQueryS(Structure):
+ pass
+NotmuchQueryP = POINTER(NotmuchQueryS)
+
+
+class NotmuchThreadsS(Structure):
+ pass
+NotmuchThreadsP = POINTER(NotmuchThreadsS)
+
+
+class NotmuchThreadS(Structure):
+ pass
+NotmuchThreadP = POINTER(NotmuchThreadS)
+
+
+class NotmuchMessagesS(Structure):
+ pass
+NotmuchMessagesP = POINTER(NotmuchMessagesS)
+
+
+class NotmuchMessageS(Structure):
+ pass
+NotmuchMessageP = POINTER(NotmuchMessageS)
+
+
+class NotmuchTagsS(Structure):
+ pass
+NotmuchTagsP = POINTER(NotmuchTagsS)
+
+
+class NotmuchDirectoryS(Structure):
+ pass
+NotmuchDirectoryP = POINTER(NotmuchDirectoryS)
+
+class NotmuchFilenamesS(Structure):
+ pass
+NotmuchFilenamesP = POINTER(NotmuchFilenamesS)
projects / notmuch / blobdiff