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-rw-r--r--Lib/bsddb/dbtables.py358
1 files changed, 231 insertions, 127 deletions
diff --git a/Lib/bsddb/dbtables.py b/Lib/bsddb/dbtables.py
index 563390b..18b2269 100644
--- a/Lib/bsddb/dbtables.py
+++ b/Lib/bsddb/dbtables.py
@@ -13,30 +13,29 @@
# -- Gregory P. Smith <greg@krypto.org>
# This provides a simple database table interface built on top of
-# the Python BerkeleyDB 3 interface.
+# the Python Berkeley DB 3 interface.
#
_cvsid = '$Id$'
import re
import sys
import copy
-import struct
import random
-import pickle
-
-from bsddb.db import *
+import struct
+import pickle as pickle
-# All table names, row names etc. must be ASCII strings
-# However, rowids, when represented as strings, are latin-1 encoded
-def _E(s):
- return s.encode("ascii")
+try:
+ # For Pythons w/distutils pybsddb
+ from bsddb3 import db
+except ImportError:
+ # For Python 2.3
+ from bsddb import db
# XXX(nnorwitz): is this correct? DBIncompleteError is conditional in _bsddb.c
-try:
- DBIncompleteError
-except NameError:
+if not hasattr(db,"DBIncompleteError") :
class DBIncompleteError(Exception):
pass
+ db.DBIncompleteError = DBIncompleteError
class TableDBError(Exception):
pass
@@ -51,22 +50,22 @@ class Cond:
class ExactCond(Cond):
"""Acts as an exact match condition function"""
- def __init__(self, strtomatch, encoding="utf-8"):
- self.strtomatch = strtomatch.encode(encoding)
+ def __init__(self, strtomatch):
+ self.strtomatch = strtomatch
def __call__(self, s):
return s == self.strtomatch
class PrefixCond(Cond):
"""Acts as a condition function for matching a string prefix"""
- def __init__(self, prefix, encoding="utf-8"):
- self.prefix = prefix.encode(encoding)
+ def __init__(self, prefix):
+ self.prefix = prefix
def __call__(self, s):
return s[:len(self.prefix)] == self.prefix
class PostfixCond(Cond):
"""Acts as a condition function for matching a string postfix"""
- def __init__(self, postfix, encoding="utf-8"):
- self.postfix = postfix.encode(encoding)
+ def __init__(self, postfix):
+ self.postfix = postfix
def __call__(self, s):
return s[-len(self.postfix):] == self.postfix
@@ -76,7 +75,7 @@ class LikeCond(Cond):
string. Case insensitive and % signs are wild cards.
This isn't perfect but it should work for the simple common cases.
"""
- def __init__(self, likestr, re_flags=re.IGNORECASE, encoding="utf-8"):
+ def __init__(self, likestr, re_flags=re.IGNORECASE):
# escape python re characters
chars_to_escape = '.*+()[]?'
for char in chars_to_escape :
@@ -84,18 +83,8 @@ class LikeCond(Cond):
# convert %s to wildcards
self.likestr = likestr.replace('%', '.*')
self.re = re.compile('^'+self.likestr+'$', re_flags)
- self.encoding = encoding
def __call__(self, s):
- return self.re.match(s.decode(self.encoding))
-
-def CmpToKey(mycmp):
- 'Convert a cmp= function into a key= function'
- class K(object):
- def __init__(self, obj, *args):
- self.obj = obj
- def __lt__(self, other):
- return mycmp(self.obj, other.obj) == -1
- return K
+ return self.re.match(s)
#
# keys used to store database metadata
@@ -104,7 +93,7 @@ _table_names_key = '__TABLE_NAMES__' # list of the tables in this db
_columns = '._COLUMNS__' # table_name+this key contains a list of columns
def _columns_key(table):
- return _E(table + _columns)
+ return table + _columns
#
# these keys are found within table sub databases
@@ -114,20 +103,21 @@ _rowid = '._ROWID_.' # this+rowid+this key contains a unique entry for each
# row in the table. (no data is stored)
_rowid_str_len = 8 # length in bytes of the unique rowid strings
+
def _data_key(table, col, rowid):
- return _E(table + _data + col + _data) + rowid
+ return table + _data + col + _data + rowid
def _search_col_data_key(table, col):
- return _E(table + _data + col + _data)
+ return table + _data + col + _data
def _search_all_data_key(table):
- return _E(table + _data)
+ return table + _data
def _rowid_key(table, rowid):
- return _E(table + _rowid) + rowid + _E(_rowid)
+ return table + _rowid + rowid + _rowid
def _search_rowid_key(table):
- return _E(table + _rowid)
+ return table + _rowid
def contains_metastrings(s) :
"""Verify that the given string does not contain any
@@ -146,43 +136,110 @@ def contains_metastrings(s) :
class bsdTableDB :
def __init__(self, filename, dbhome, create=0, truncate=0, mode=0o600,
recover=0, dbflags=0):
- """bsdTableDB(filename, dbhome, create=0, truncate=0, mode=0o600)
+ """bsdTableDB(filename, dbhome, create=0, truncate=0, mode=0600)
- Open database name in the dbhome BerkeleyDB directory.
+ Open database name in the dbhome Berkeley DB directory.
Use keyword arguments when calling this constructor.
"""
self.db = None
- myflags = DB_THREAD
+ myflags = db.DB_THREAD
if create:
- myflags |= DB_CREATE
- flagsforenv = (DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_LOG |
- DB_INIT_TXN | dbflags)
+ myflags |= db.DB_CREATE
+ flagsforenv = (db.DB_INIT_MPOOL | db.DB_INIT_LOCK | db.DB_INIT_LOG |
+ db.DB_INIT_TXN | dbflags)
# DB_AUTO_COMMIT isn't a valid flag for env.open()
try:
- dbflags |= DB_AUTO_COMMIT
+ dbflags |= db.DB_AUTO_COMMIT
except AttributeError:
pass
if recover:
- flagsforenv = flagsforenv | DB_RECOVER
- self.env = DBEnv()
+ flagsforenv = flagsforenv | db.DB_RECOVER
+ self.env = db.DBEnv()
# enable auto deadlock avoidance
- self.env.set_lk_detect(DB_LOCK_DEFAULT)
+ self.env.set_lk_detect(db.DB_LOCK_DEFAULT)
self.env.open(dbhome, myflags | flagsforenv)
if truncate:
- myflags |= DB_TRUNCATE
- self.db = DB(self.env)
+ myflags |= db.DB_TRUNCATE
+ self.db = db.DB(self.env)
# this code relies on DBCursor.set* methods to raise exceptions
# rather than returning None
self.db.set_get_returns_none(1)
# allow duplicate entries [warning: be careful w/ metadata]
- self.db.set_flags(DB_DUP)
- self.db.open(filename, DB_BTREE, dbflags | myflags, mode)
+ self.db.set_flags(db.DB_DUP)
+ self.db.open(filename, db.DB_BTREE, dbflags | myflags, mode)
self.dbfilename = filename
+
+ if sys.version_info[0] >= 3 :
+ class cursor_py3k(object) :
+ def __init__(self, dbcursor) :
+ self._dbcursor = dbcursor
+
+ def close(self) :
+ return self._dbcursor.close()
+
+ def set_range(self, search) :
+ v = self._dbcursor.set_range(bytes(search, "iso8859-1"))
+ if v != None :
+ v = (v[0].decode("iso8859-1"),
+ v[1].decode("iso8859-1"))
+ return v
+
+ def __next__(self) :
+ v = getattr(self._dbcursor, "next")()
+ if v != None :
+ v = (v[0].decode("iso8859-1"),
+ v[1].decode("iso8859-1"))
+ return v
+
+ class db_py3k(object) :
+ def __init__(self, db) :
+ self._db = db
+
+ def cursor(self, txn=None) :
+ return cursor_py3k(self._db.cursor(txn=txn))
+
+ def has_key(self, key, txn=None) :
+ return getattr(self._db,"has_key")(bytes(key, "iso8859-1"),
+ txn=txn)
+
+ def put(self, key, value, flags=0, txn=None) :
+ key = bytes(key, "iso8859-1")
+ if value != None :
+ value = bytes(value, "iso8859-1")
+ return self._db.put(key, value, flags=flags, txn=txn)
+
+ def put_bytes(self, key, value, txn=None) :
+ key = bytes(key, "iso8859-1")
+ return self._db.put(key, value, txn=txn)
+
+ def get(self, key, txn=None, flags=0) :
+ key = bytes(key, "iso8859-1")
+ v = self._db.get(key, txn=txn, flags=flags)
+ if v != None :
+ v = v.decode("iso8859-1")
+ return v
+
+ def get_bytes(self, key, txn=None, flags=0) :
+ key = bytes(key, "iso8859-1")
+ return self._db.get(key, txn=txn, flags=flags)
+
+ def delete(self, key, txn=None) :
+ key = bytes(key, "iso8859-1")
+ return self._db.delete(key, txn=txn)
+
+ def close (self) :
+ return self._db.close()
+
+ self.db = db_py3k(self.db)
+ else : # Python 2.x
+ pass
+
# Initialize the table names list if this is a new database
txn = self.env.txn_begin()
try:
- if not self.db.has_key(_E(_table_names_key), txn):
- self.db.put(_E(_table_names_key), pickle.dumps([], 1), txn=txn)
+ if not getattr(self.db, "has_key")(_table_names_key, txn):
+ getattr(self.db, "put_bytes", self.db.put) \
+ (_table_names_key, pickle.dumps([], 1), txn=txn)
# Yes, bare except
except:
txn.abort()
@@ -206,13 +263,13 @@ class bsdTableDB :
def checkpoint(self, mins=0):
try:
self.env.txn_checkpoint(mins)
- except DBIncompleteError:
+ except db.DBIncompleteError:
pass
def sync(self):
try:
self.db.sync()
- except DBIncompleteError:
+ except db.DBIncompleteError:
pass
def _db_print(self) :
@@ -223,13 +280,13 @@ class bsdTableDB :
key, data = cur.first()
while 1:
print(repr({key: data}))
- next = cur.next()
+ next = next(cur)
if next:
key, data = next
else:
cur.close()
return
- except DBNotFoundError:
+ except db.DBNotFoundError:
cur.close()
@@ -239,6 +296,7 @@ class bsdTableDB :
raises TableDBError if it already exists or for other DB errors.
"""
assert isinstance(columns, list)
+
txn = None
try:
# checking sanity of the table and column names here on
@@ -252,29 +310,33 @@ class bsdTableDB :
"bad column name: contains reserved metastrings")
columnlist_key = _columns_key(table)
- if self.db.has_key(columnlist_key):
+ if getattr(self.db, "has_key")(columnlist_key):
raise TableAlreadyExists("table already exists")
txn = self.env.txn_begin()
# store the table's column info
- self.db.put(columnlist_key, pickle.dumps(columns, 1), txn=txn)
+ getattr(self.db, "put_bytes", self.db.put)(columnlist_key,
+ pickle.dumps(columns, 1), txn=txn)
# add the table name to the tablelist
- tablelist = pickle.loads(self.db.get(_E(_table_names_key), txn=txn,
- flags=DB_RMW))
+ tablelist = pickle.loads(getattr(self.db, "get_bytes",
+ self.db.get) (_table_names_key, txn=txn, flags=db.DB_RMW))
tablelist.append(table)
# delete 1st, in case we opened with DB_DUP
- self.db.delete(_E(_table_names_key), txn=txn)
- self.db.put(_E(_table_names_key), pickle.dumps(tablelist, 1), txn=txn)
+ self.db.delete(_table_names_key, txn=txn)
+ getattr(self.db, "put_bytes", self.db.put)(_table_names_key,
+ pickle.dumps(tablelist, 1), txn=txn)
txn.commit()
txn = None
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
- finally:
+ except db.DBError as dberror:
if txn:
txn.abort()
- txn = None
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
+
def ListTableColumns(self, table):
"""Return a list of columns in the given table.
@@ -285,9 +347,10 @@ class bsdTableDB :
raise ValueError("bad table name: contains reserved metastrings")
columnlist_key = _columns_key(table)
- if not self.db.has_key(columnlist_key):
+ if not getattr(self.db, "has_key")(columnlist_key):
return []
- pickledcolumnlist = self.db.get(columnlist_key)
+ pickledcolumnlist = getattr(self.db, "get_bytes",
+ self.db.get)(columnlist_key)
if pickledcolumnlist:
return pickle.loads(pickledcolumnlist)
else:
@@ -295,7 +358,7 @@ class bsdTableDB :
def ListTables(self):
"""Return a list of tables in this database."""
- pickledtablelist = self.db.get(_E(_table_names_key))
+ pickledtablelist = self.db.get_get(_table_names_key)
if pickledtablelist:
return pickle.loads(pickledtablelist)
else:
@@ -311,6 +374,7 @@ class bsdTableDB :
all of its current columns.
"""
assert isinstance(columns, list)
+
try:
self.CreateTable(table, columns)
except TableAlreadyExists:
@@ -322,7 +386,8 @@ class bsdTableDB :
# load the current column list
oldcolumnlist = pickle.loads(
- self.db.get(columnlist_key, txn=txn, flags=DB_RMW))
+ getattr(self.db, "get_bytes",
+ self.db.get)(columnlist_key, txn=txn, flags=db.DB_RMW))
# create a hash table for fast lookups of column names in the
# loop below
oldcolumnhash = {}
@@ -340,7 +405,7 @@ class bsdTableDB :
if newcolumnlist != oldcolumnlist :
# delete the old one first since we opened with DB_DUP
self.db.delete(columnlist_key, txn=txn)
- self.db.put(columnlist_key,
+ getattr(self.db, "put_bytes", self.db.put)(columnlist_key,
pickle.dumps(newcolumnlist, 1),
txn=txn)
@@ -348,19 +413,22 @@ class bsdTableDB :
txn = None
self.__load_column_info(table)
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
- finally:
+ except db.DBError as dberror:
if txn:
txn.abort()
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
def __load_column_info(self, table) :
"""initialize the self.__tablecolumns dict"""
# check the column names
try:
- tcolpickles = self.db.get(_columns_key(table))
- except DBNotFoundError:
+ tcolpickles = getattr(self.db, "get_bytes",
+ self.db.get)(_columns_key(table))
+ except db.DBNotFoundError:
raise TableDBError("unknown table: %r" % (table,))
if not tcolpickles:
raise TableDBError("unknown table: %r" % (table,))
@@ -376,13 +444,16 @@ class bsdTableDB :
blist = []
for x in range(_rowid_str_len):
blist.append(random.randint(0,255))
- newid = bytes(blist)
+ newid = struct.pack('B'*_rowid_str_len, *blist)
+
+ if sys.version_info[0] >= 3 :
+ newid = newid.decode("iso8859-1") # 8 bits
# Guarantee uniqueness by adding this key to the database
try:
self.db.put(_rowid_key(table, newid), None, txn=txn,
- flags=DB_NOOVERWRITE)
- except DBKeyExistError:
+ flags=db.DB_NOOVERWRITE)
+ except db.DBKeyExistError:
pass
else:
unique = 1
@@ -394,15 +465,16 @@ class bsdTableDB :
"""Insert(table, datadict) - Insert a new row into the table
using the keys+values from rowdict as the column values.
"""
+
txn = None
try:
- if not self.db.has_key(_columns_key(table)):
+ if not getattr(self.db, "has_key")(_columns_key(table)):
raise TableDBError("unknown table")
# check the validity of each column name
if table not in self.__tablecolumns:
self.__load_column_info(table)
- for column in rowdict.keys() :
+ for column in list(rowdict.keys()) :
if not self.__tablecolumns[table].count(column):
raise TableDBError("unknown column: %r" % (column,))
@@ -411,14 +483,14 @@ class bsdTableDB :
rowid = self.__new_rowid(table, txn=txn)
# insert the row values into the table database
- for column, dataitem in rowdict.items():
+ for column, dataitem in list(rowdict.items()):
# store the value
self.db.put(_data_key(table, column, rowid), dataitem, txn=txn)
txn.commit()
txn = None
- except DBError as dberror:
+ except db.DBError as dberror:
# WIBNI we could just abort the txn and re-raise the exception?
# But no, because TableDBError is not related to DBError via
# inheritance, so it would be backwards incompatible. Do the next
@@ -427,11 +499,10 @@ class bsdTableDB :
if txn:
txn.abort()
self.db.delete(_rowid_key(table, rowid))
- txn = None
- raise TableDBError(dberror.args[1]).with_traceback(info[2])
- finally:
- if txn:
- txn.abort()
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1]).with_traceback(info[2])
+ else :
+ raise TableDBError(dberror.args[1]).with_traceback(info[2])
def Modify(self, table, conditions={}, mappings={}):
@@ -445,13 +516,13 @@ class bsdTableDB :
condition callable expecting the data string as an argument and
returning the new string for that column.
"""
+
try:
matching_rowids = self.__Select(table, [], conditions)
# modify only requested columns
- columns = mappings.keys()
- for rowid in matching_rowids.keys():
- rowid = rowid.encode("latin-1")
+ columns = list(mappings.keys())
+ for rowid in list(matching_rowids.keys()):
txn = None
try:
for column in columns:
@@ -464,7 +535,7 @@ class bsdTableDB :
self.db.delete(
_data_key(table, column, rowid),
txn=txn)
- except DBNotFoundError:
+ except db.DBNotFoundError:
# XXXXXXX row key somehow didn't exist, assume no
# error
dataitem = None
@@ -477,12 +548,16 @@ class bsdTableDB :
txn = None
# catch all exceptions here since we call unknown callables
- finally:
+ except:
if txn:
txn.abort()
+ raise
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
+ except db.DBError as dberror:
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
def Delete(self, table, conditions={}):
"""Delete(table, conditions) - Delete items matching the given
@@ -492,37 +567,41 @@ class bsdTableDB :
condition functions expecting the data string as an
argument and returning a boolean.
"""
+
try:
matching_rowids = self.__Select(table, [], conditions)
# delete row data from all columns
columns = self.__tablecolumns[table]
- for rowid in matching_rowids.keys():
+ for rowid in list(matching_rowids.keys()):
txn = None
try:
txn = self.env.txn_begin()
for column in columns:
# delete the data key
try:
- self.db.delete(_data_key(table, column,
- rowid.encode("latin-1")),
+ self.db.delete(_data_key(table, column, rowid),
txn=txn)
- except DBNotFoundError:
+ except db.DBNotFoundError:
# XXXXXXX column may not exist, assume no error
pass
try:
- self.db.delete(_rowid_key(table, rowid.encode("latin-1")), txn=txn)
- except DBNotFoundError:
+ self.db.delete(_rowid_key(table, rowid), txn=txn)
+ except db.DBNotFoundError:
# XXXXXXX row key somehow didn't exist, assume no error
pass
txn.commit()
txn = None
- finally:
+ except db.DBError as dberror:
if txn:
txn.abort()
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
+ raise
+ except db.DBError as dberror:
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
def Select(self, table, columns, conditions={}):
@@ -541,10 +620,13 @@ class bsdTableDB :
if columns is None:
columns = self.__tablecolumns[table]
matching_rowids = self.__Select(table, columns, conditions)
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
+ except db.DBError as dberror:
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
# return the matches as a list of dictionaries
- return matching_rowids.values()
+ return list(matching_rowids.values())
def __Select(self, table, columns, conditions):
@@ -595,8 +677,19 @@ class bsdTableDB :
# leave all unknown condition callables alone as equals
return 0
- conditionlist = list(conditions.items())
- conditionlist.sort(key=CmpToKey(cmp_conditions))
+ if sys.version_info[0] < 3 :
+ conditionlist = list(conditions.items())
+ conditionlist.sort(cmp_conditions)
+ else : # Insertion Sort. Please, improve
+ conditionlist = []
+ for i in list(conditions.items()) :
+ for j, k in enumerate(conditionlist) :
+ r = cmp_conditions(k, i)
+ if r == 1 :
+ conditionlist.insert(j, i)
+ break
+ else :
+ conditionlist.append(i)
# Apply conditions to column data to find what we want
cur = self.db.cursor()
@@ -614,7 +707,7 @@ class bsdTableDB :
key, data = cur.set_range(searchkey)
while key[:len(searchkey)] == searchkey:
# extract the rowid from the key
- rowid = key[-_rowid_str_len:].decode("latin-1")
+ rowid = key[-_rowid_str_len:]
if rowid not in rejected_rowids:
# if no condition was specified or the condition
@@ -629,11 +722,15 @@ class bsdTableDB :
del matching_rowids[rowid]
rejected_rowids[rowid] = rowid
- key, data = cur.next()
+ key, data = next(cur)
- except DBError as dberror:
- if dberror.args[0] != DB_NOTFOUND:
- raise
+ except db.DBError as dberror:
+ if sys.version_info[0] < 3 :
+ if dberror[0] != db.DB_NOTFOUND:
+ raise
+ else :
+ if dberror.args[0] != db.DB_NOTFOUND:
+ raise
continue
cur.close()
@@ -644,17 +741,20 @@ class bsdTableDB :
# extract any remaining desired column data from the
# database for the matching rows.
if len(columns) > 0:
- for rowid, rowdata in matching_rowids.items():
- rowid = rowid.encode("latin-1")
+ for rowid, rowdata in list(matching_rowids.items()):
for column in columns:
if column in rowdata:
continue
try:
rowdata[column] = self.db.get(
_data_key(table, column, rowid))
- except DBError as dberror:
- if dberror.args[0] != DB_NOTFOUND:
- raise
+ except db.DBError as dberror:
+ if sys.version_info[0] < 3 :
+ if dberror[0] != db.DB_NOTFOUND:
+ raise
+ else :
+ if dberror.args[0] != db.DB_NOTFOUND:
+ raise
rowdata[column] = None
# return the matches
@@ -677,7 +777,7 @@ class bsdTableDB :
while 1:
try:
key, data = cur.set_range(table_key)
- except DBNotFoundError:
+ except db.DBNotFoundError:
break
# only delete items in this table
if key[:len(table_key)] != table_key:
@@ -689,7 +789,7 @@ class bsdTableDB :
while 1:
try:
key, data = cur.set_range(table_key)
- except DBNotFoundError:
+ except db.DBNotFoundError:
break
# only delete items in this table
if key[:len(table_key)] != table_key:
@@ -700,15 +800,17 @@ class bsdTableDB :
# delete the tablename from the table name list
tablelist = pickle.loads(
- self.db.get(_E(_table_names_key), txn=txn, flags=DB_RMW))
+ getattr(self.db, "get_bytes", self.db.get)(_table_names_key,
+ txn=txn, flags=db.DB_RMW))
try:
tablelist.remove(table)
except ValueError:
# hmm, it wasn't there, oh well, that's what we want.
pass
# delete 1st, incase we opened with DB_DUP
- self.db.delete(_E(_table_names_key), txn=txn)
- self.db.put(_E(_table_names_key), pickle.dumps(tablelist, 1), txn=txn)
+ self.db.delete(_table_names_key, txn=txn)
+ getattr(self.db, "put_bytes", self.db.put)(_table_names_key,
+ pickle.dumps(tablelist, 1), txn=txn)
txn.commit()
txn = None
@@ -716,8 +818,10 @@ class bsdTableDB :
if table in self.__tablecolumns:
del self.__tablecolumns[table]
- except DBError as dberror:
- raise TableDBError(dberror.args[1])
- finally:
+ except db.DBError as dberror:
if txn:
txn.abort()
+ if sys.version_info[0] < 3 :
+ raise TableDBError(dberror[1])
+ else :
+ raise TableDBError(dberror.args[1])
generated by cgit v0.12 at 2025-02-09 02:53:55 (GMT)