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python-javaobj/javaobj/utils.py at master · qistoph/python-javaobj · GitHub
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utils.py
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#!/usr/bin/python
# -- Content-Encoding: utf-8 --
"""
Provides utility methods used by the core implementation of javaobj.
Namely: logging methods, bytes/str/unicode converters
:authors: Thomas Calmant
:license: Apache License 2.0
:version: 0.3.0
:status: Alpha
..
Copyright 2019 Thomas Calmant
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
# Standard library
import
logging
import
sys
# Modified UTF-8 parser
from
javaobj
.
modifiedutf8
import
decode_modified_utf8
# ------------------------------------------------------------------------------
# Module version
__version_info__
=
(
0
,
3
,
0
)
__version__
=
"."
.
join
(
str
(
x
)
for
x
in
__version_info__
)
# Documentation strings format
__docformat__
=
"restructuredtext en"
# ------------------------------------------------------------------------------
# Setup the logger
_log
=
logging
.
getLogger
(
"javaobj"
)
def
log_debug
(
message
,
ident
=
0
):
"""
Logs a message at debug level
:param message: Message to log
:param ident: Number of indentation spaces
"""
_log
.
debug
(
"%s%s"
,
" "
*
(
ident
*
2
),
message
)
def
log_error
(
message
,
ident
=
0
):
"""
Logs a message at error level
:param message: Message to log
:param ident: Number of indentation spaces
"""
_log
.
error
(
"%s%s"
,
" "
*
(
ident
*
2
),
message
)
# ------------------------------------------------------------------------------
if
sys
.
version_info
[
0
]
>=
3
:
UNICODE_TYPE
=
str
unicode_char
=
chr
# Python 3 interpreter : bytes & str
def
to_bytes
(
data
,
encoding
=
"UTF-8"
):
"""
Converts the given string to an array of bytes.
Returns the first parameter if it is already an array of bytes.
:param data: A unicode string
:param encoding: The encoding of data
:return: The corresponding array of bytes
"""
if
type
(
data
)
is
bytes
:
# Nothing to do
return
data
return
data
.
encode
(
encoding
)
def
to_str
(
data
,
encoding
=
"UTF-8"
):
"""
Converts the given parameter to a string.
Returns the first parameter if it is already an instance of ``str``.
:param data: A string
:param encoding: The encoding of data
:return: The corresponding string
"""
if
type
(
data
)
is
str
:
# Nothing to do
return
data
try
:
return
str
(
data
,
encoding
)
except
UnicodeDecodeError
:
return
decode_modified_utf8
(
data
)[
0
]
# Same operation
to_unicode
=
to_str
def
read_to_str
(
data
):
"""
Concats all bytes into a string
"""
return
""
.
join
(
chr
(
char
)
for
char
in
data
)
else
:
UNICODE_TYPE
=
unicode
unicode_char
=
unichr
# Python 2 interpreter : str & unicode
def
to_str
(
data
,
encoding
=
"UTF-8"
):
"""
Converts the given parameter to a string.
Returns the first parameter if it is already an instance of ``str``.
:param data: A string
:param encoding: The encoding of data
:return: The corresponding string
"""
if
type
(
data
)
is
str
:
# Nothing to do
return
data
return
data
.
encode
(
encoding
)
# Same operation
to_bytes
=
to_str
# Python 2 interpreter : str & unicode
def
to_unicode
(
data
,
encoding
=
"UTF-8"
):
"""
Converts the given parameter to a string.
Returns the first parameter if it is already an instance of ``str``.
:param data: A string
:param encoding: The encoding of data
:return: The corresponding string
"""
if
type
(
data
)
is
unicode
:
# Nothing to do
return
data
try
:
return
data
.
decode
(
encoding
)
except
UnicodeDecodeError
:
return
decode_modified_utf8
(
data
)[
0
]
def
read_to_str
(
data
):
"""
Nothing to do in Python 2
"""
return
data
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