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#
# $Id: Store.py,v 1.10 1999/11/29 06:57:18 rob Exp $
#
# Copyright 1999 Rob Tillotson <robt@debian.org>
# All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose and without fee or royalty is
# hereby granted, provided that the above copyright notice appear in
# all copies and that both the copyright notice and this permission
# notice appear in supporting documentation or portions thereof,
# including modifications, that you you make.
#
# THE AUTHOR ROB TILLOTSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE!
#
"""Data Store API.
Stores may have the following properties:
read - can open existing databases for reading
write - can open existing databases for writing
create - can create new databases (which are implicitly open for writing)
delete - can delete databases
list - can list databases and their info
install - has an install method which should be used when copying into
this store, instead of using the normal 'copy' method
"""
__version__ = '$Id: Store.py,v 1.10 1999/11/29 06:57:18 rob Exp $'
__copyright__ = 'Copyright 1999 Rob Tillotson <robt@debian.org>'
import Pyrite
from Pyrite import Plugin, Database, PrefBlock, _
import sys
#import DBTypes
class BaseStore:
properties = ()
db_properties = ()
def __init__(self):
self.context = None
def set_context(self, c):
self.context = c
def __getattr__(self, k):
if hasattr(self.context, 'option_values') and \
self.context.option_values.has_key(k):
return self.context.option_values[k]
else: raise AttributeError, k
def has_option(self, k):
return hasattr(self.context, 'option_values') and \
self.context.option_values.has_key(k)
def get_option(self, k):
if hasattr(self.context, 'option_values'):
return self.context.option_values[k]
else: raise KeyError, k
def get_plugin(self, *a, **kw):
return apply(self.context.get_plugin, a, kw)
def list_plugins(self, *a, **kw):
return apply(self.context.list_plugins, a, kw)
def list_plugin_info(self, *a, **kw):
return apply(self.context.list_plugin_info, a, kw)
# property support
def has_property(self, p): return p in self.properties
def test_db_properties(self, properties):
"""Check whether this store can provide a particular type of database.
Given a list of DB properties, this function tests whether a database
with the requested properties is possible using this store. If it is,
this function returns a propertly list which describes the resulting
database. (Note that the returned property list might be LONGER than
the one supplied to this function: that is, if you ask for a database
with the 'foo' property and the only way the store can grant that is
by returning a ['foo', 'bar', 'baz'] database, that's what will be
returned. If the property combination isn't possible, returns None.
The standard behavior of this function assumes that all databases opened
by a particular Store have the same properties. Should this not be
the case, the Store should override.
"""
for p in properties:
if p not in self.db_properties: return None
return self.db_properties
def open(self, name, mode='rs', dbclass=Database, properties=(), **kw):
if not self.test_db_properties(properties):
raise RuntimeError, _("cannot provide db with properties %s") % properties
t = apply(self._open, (name, mode, properties), kw)
return apply(dbclass, t)
def create(self, name, creator, type, flags=0, version=1, dbclass=Database,
properties=(),
filename = None, info=None, **kw):
if not self.test_db_properties(properties):
raise RuntimeError, _("cannot provide db with properties %s") % properties
t = apply(self._create, (name, creator, type, flags, version, filename,
info), kw)
return apply(dbclass, t)
def delete(self, name, **kw):
"""Delete a database in the store."""
raise RuntimeError, _("unimplemented method")
def info(self, name, **kw):
"""Get info about a database."""
raise RuntimeError, _("unimplemented method")
def list(self, **kw):
"""Return a list of database names."""
raise RuntimeError, _("unimplemented method")
def listinfo(self, name=None, creator=None, type=None, **kw):
"""Return a list of database names with information."""
raise RuntimeError, _("unimplemented method")
def getpref(self, creator, id, saved=1):
"""Return a preference (as a raw string!)."""
raise RuntimeError, _("unimplemented method")
def setpref(self, raw, creator, id, version=0, saved=1):
"""Set a preference."""
raise RuntimeError, _("unimplemented method")
#####
def install(self, store, name):
store.copy(self, name)
def copy(self, store, name):
"""Copy a database into another store."""
idb = self.open(name, 'rs')
try:
store.delete(name)
except:
pass
flags = 0
if idb.info['flagReset']: flags = flags | 0x0020
if idb.info['flagResource']: flags = flags | 0x0001
if idb.info['flagNewer']: flags = flags | 0x0010
if idb.info['flagExcludeFromSync']: flags = flags | 0x0080
if idb.info['flagAppInfoDirty']: flags = flags | 0x0004
if idb.info['flagReadOnly']: flags = flags | 0x0002
if idb.info['flagBackup']: flags = flags | 0x0008
if idb.info['flagOpen']: flags = flags | 0x8000
odb = store.create(name, idb.info['creator'], idb.info['type'],
flags, idb.info['version'], info=idb.info)
try:
a = idb.get_appblock()
odb.set_appblock(a)
except:
pass
# For some reason, there is a segfault inside pilot-link on my
# system. For now, this part is just skipped as a result. For
# anyone who is saying "but that means the sortblock isn't copied",
# I simply point to the source to pilot-link, and note that it isn't
# copied there either...
#a = idb.getSortBlock()
#odb.setSortBlock(a)
#print "sortblock"
if idb.info['flagResource']:
for i in range(0, len(idb)):
r = idb[i]
odb.append(r)
else:
for i in range(0, len(idb)):
r = idb[i]
if r.deleted or r.archived:
continue
odb.append(r)
idb.close()
odb.close()
class Store(Plugin.Plugin):
type = 'Store'
store_class = BaseStore
def __call__(self, *a, **kw):
o = apply(self.store_class, a, kw)
o.set_context(self)
# copy plugin attributes
o.name = self.name
o.version = self.version
o.author = self.author
o.description = self.description
o.url = self.url
return o
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