add u1db code (not as submodule)

1 files changed, 189 insertions, 0 deletions

diff --git a/u1db/errors.py b/u1db/errors.py
new file mode 100644
index 00000000..967c7c38
--- /dev/null
+++ b/u1db/errors.py
@@ -0,0 +1,189 @@
+# Copyright 2011-2012 Canonical Ltd.
+#
+# This file is part of u1db.
+#
+# u1db is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3
+# as published by the Free Software Foundation.
+#
+# u1db is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with u1db.  If not, see <http://www.gnu.org/licenses/>.
+
+"""A list of errors that u1db can raise."""
+
+
+class U1DBError(Exception):
+    """Generic base class for U1DB errors."""
+
+    # description/tag for identifying the error during transmission (http,...)
+    wire_description = "error"
+
+    def __init__(self, message=None):
+        self.message = message
+
+
+class RevisionConflict(U1DBError):
+    """The document revisions supplied does not match the current version."""
+
+    wire_description = "revision conflict"
+
+
+class InvalidJSON(U1DBError):
+    """Content was not valid json."""
+
+
+class InvalidContent(U1DBError):
+    """Content was not a python dictionary."""
+
+
+class InvalidDocId(U1DBError):
+    """A document was requested with an invalid document identifier."""
+
+    wire_description = "invalid document id"
+
+
+class MissingDocIds(U1DBError):
+    """Needs document ids."""
+
+    wire_description = "missing document ids"
+
+
+class DocumentTooBig(U1DBError):
+    """Document exceeds the maximum document size for this database."""
+
+    wire_description = "document too big"
+
+
+class UserQuotaExceeded(U1DBError):
+    """Document exceeds the maximum document size for this database."""
+
+    wire_description = "user quota exceeded"
+
+
+class SubscriptionNeeded(U1DBError):
+    """User needs a subscription to be able to use this replica.."""
+
+    wire_description = "user needs subscription"
+
+
+class InvalidTransactionId(U1DBError):
+    """Invalid transaction for generation."""
+
+    wire_description = "invalid transaction id"
+
+
+class InvalidGeneration(U1DBError):
+    """Generation was previously synced with a different transaction id."""
+
+    wire_description = "invalid generation"
+
+
+class ConflictedDoc(U1DBError):
+    """The document is conflicted, you must call resolve before put()"""
+
+
+class InvalidValueForIndex(U1DBError):
+    """The values supplied does not match the index definition."""
+
+
+class InvalidGlobbing(U1DBError):
+    """Raised if wildcard matches are not strictly at the tail of the request.
+    """
+
+
+class DocumentDoesNotExist(U1DBError):
+    """The document does not exist."""
+
+    wire_description = "document does not exist"
+
+
+class DocumentAlreadyDeleted(U1DBError):
+    """The document was already deleted."""
+
+    wire_description = "document already deleted"
+
+
+class DatabaseDoesNotExist(U1DBError):
+    """The database does not exist."""
+
+    wire_description = "database does not exist"
+
+
+class IndexNameTakenError(U1DBError):
+    """The given index name is already taken."""
+
+
+class IndexDefinitionParseError(U1DBError):
+    """The index definition cannot be parsed."""
+
+
+class IndexDoesNotExist(U1DBError):
+    """No index of that name exists."""
+
+
+class Unauthorized(U1DBError):
+    """Request wasn't authorized properly."""
+
+    wire_description = "unauthorized"
+
+
+class HTTPError(U1DBError):
+    """Unspecific HTTP errror."""
+
+    wire_description = None
+
+    def __init__(self, status, message=None, headers={}):
+        self.status = status
+        self.message = message
+        self.headers = headers
+
+    def __str__(self):
+        if not self.message:
+            return "HTTPError(%d)" % self.status
+        else:
+            return "HTTPError(%d, %r)" % (self.status, self.message)
+
+
+class Unavailable(HTTPError):
+    """Server not available not serve request."""
+
+    wire_description = "unavailable"
+
+    def __init__(self, message=None, headers={}):
+        super(Unavailable, self).__init__(503, message, headers)
+
+    def __str__(self):
+        if not self.message:
+            return "Unavailable()"
+        else:
+            return "Unavailable(%r)" % self.message
+
+
+class BrokenSyncStream(U1DBError):
+    """Unterminated or otherwise broken sync exchange stream."""
+
+    wire_description = None
+
+
+class UnknownAuthMethod(U1DBError):
+    """Unknown auhorization method."""
+
+    wire_description = None
+
+
+# mapping wire (transimission) descriptions/tags for errors to the exceptions
+wire_description_to_exc = dict(
+    (x.wire_description, x) for x in globals().values()
+            if getattr(x, 'wire_description', None) not in (None, "error")
+)
+wire_description_to_exc["error"] = U1DBError
+
+
+#
+# wire error descriptions not corresponding to an exception
+DOCUMENT_DELETED = "document deleted"