/usr/lib/python2.7/dist-packages/bzrlib/transport/decorator.py is in python-bzrlib 2.7.0-2ubuntu3.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | # Copyright (C) 2006-2010 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Implementation of Transport that decorates another transport.
This does not change the transport behaviour at all, but provides all the
stub functions to allow other decorators to be written easily.
"""
from __future__ import absolute_import
from bzrlib import transport
class TransportDecorator(transport.Transport):
"""A no-change decorator for Transports.
Subclasses of this are new transports that are based on an
underlying transport and can override or intercept some
behavior. For example ReadonlyTransportDecorator prevents
all write attempts, and FakeNFSTransportDecorator simulates
some NFS quirks.
This decorator class is not directly usable as a decorator:
you must use a subclass which has overridden the _get_url_prefix() class
method to return the url prefix for the subclass.
"""
def __init__(self, url, _decorated=None, _from_transport=None):
"""Set the 'base' path of the transport.
:param _decorated: A private parameter for cloning.
:param _from_transport: Is available for subclasses that
need to share state across clones.
"""
prefix = self._get_url_prefix()
if not url.startswith(prefix):
raise ValueError("url %r doesn't start with decorator prefix %r" %
(url, prefix))
not_decorated_url = url[len(prefix):]
if _decorated is None:
self._decorated = transport.get_transport(
not_decorated_url)
else:
self._decorated = _decorated
super(TransportDecorator, self).__init__(prefix + self._decorated.base)
def abspath(self, relpath):
"""See Transport.abspath()."""
return self._get_url_prefix() + self._decorated.abspath(relpath)
def append_file(self, relpath, f, mode=None):
"""See Transport.append_file()."""
return self._decorated.append_file(relpath, f, mode=mode)
def append_bytes(self, relpath, bytes, mode=None):
"""See Transport.append_bytes()."""
return self._decorated.append_bytes(relpath, bytes, mode=mode)
def _can_roundtrip_unix_modebits(self):
"""See Transport._can_roundtrip_unix_modebits()."""
return self._decorated._can_roundtrip_unix_modebits()
def clone(self, offset=None):
"""See Transport.clone()."""
decorated_clone = self._decorated.clone(offset)
return self.__class__(
self._get_url_prefix() + decorated_clone.base, decorated_clone,
self)
def delete(self, relpath):
"""See Transport.delete()."""
return self._decorated.delete(relpath)
def delete_tree(self, relpath):
"""See Transport.delete_tree()."""
return self._decorated.delete_tree(relpath)
def external_url(self):
"""See bzrlib.transport.Transport.external_url."""
# while decorators are in-process only, they
# can be handed back into bzrlib safely, so
# its just the base.
return self.base
@classmethod
def _get_url_prefix(self):
"""Return the URL prefix of this decorator."""
raise NotImplementedError(self._get_url_prefix)
def get(self, relpath):
"""See Transport.get()."""
return self._decorated.get(relpath)
def get_smart_client(self):
return self._decorated.get_smart_client()
def has(self, relpath):
"""See Transport.has()."""
return self._decorated.has(relpath)
def is_readonly(self):
"""See Transport.is_readonly."""
return self._decorated.is_readonly()
def mkdir(self, relpath, mode=None):
"""See Transport.mkdir()."""
return self._decorated.mkdir(relpath, mode)
def open_write_stream(self, relpath, mode=None):
"""See Transport.open_write_stream."""
return self._decorated.open_write_stream(relpath, mode=mode)
def put_file(self, relpath, f, mode=None):
"""See Transport.put_file()."""
return self._decorated.put_file(relpath, f, mode)
def put_bytes(self, relpath, bytes, mode=None):
"""See Transport.put_bytes()."""
return self._decorated.put_bytes(relpath, bytes, mode)
def listable(self):
"""See Transport.listable."""
return self._decorated.listable()
def iter_files_recursive(self):
"""See Transport.iter_files_recursive()."""
return self._decorated.iter_files_recursive()
def list_dir(self, relpath):
"""See Transport.list_dir()."""
return self._decorated.list_dir(relpath)
def _readv(self, relpath, offsets):
"""See Transport._readv."""
return self._decorated._readv(relpath, offsets)
def recommended_page_size(self):
"""See Transport.recommended_page_size()."""
return self._decorated.recommended_page_size()
def rename(self, rel_from, rel_to):
return self._decorated.rename(rel_from, rel_to)
def rmdir(self, relpath):
"""See Transport.rmdir."""
return self._decorated.rmdir(relpath)
def _get_segment_parameters(self):
return self._decorated.segment_parameters
def _set_segment_parameters(self, value):
self._decorated.segment_parameters = value
segment_parameters = property(_get_segment_parameters,
_set_segment_parameters, "See Transport.segment_parameters")
def stat(self, relpath):
"""See Transport.stat()."""
return self._decorated.stat(relpath)
def lock_read(self, relpath):
"""See Transport.lock_read."""
return self._decorated.lock_read(relpath)
def lock_write(self, relpath):
"""See Transport.lock_write."""
return self._decorated.lock_write(relpath)
def _redirected_to(self, source, target):
redirected = self._decorated._redirected_to(source, target)
if redirected is not None:
return self.__class__(self._get_url_prefix() + redirected.base,
redirected)
else:
return None
def get_test_permutations():
"""Return the permutations to be used in testing.
The Decorator class is not directly usable, and testing it would not have
any benefit - its the concrete classes which need to be tested.
"""
return []
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