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# -*- coding: utf-8 -*-
"""
omijson.core
~~~~~~~~~~~~
This module provides the core omnijson functionality.
"""
import sys
engine = None
_engine = None
options = [
['ujson', 'loads', 'dumps', (ValueError,)],
['yajl', 'loads', 'dumps', (TypeError, ValueError)],
['jsonlib2', 'read', 'write', (ValueError,)],
['jsonlib', 'read', 'write', (ValueError,)],
['simplejson', 'loads', 'dumps', (TypeError, ValueError)],
['json', 'loads', 'dumps', (TypeError, ValueError)],
['simplejson_from_packages', 'loads', 'dumps', (ValueError,)],
]
def _import(engine):
try:
if '_from_' in engine:
engine, package = engine.split('_from_')
m = __import__(package, globals(), locals(), [engine], -1)
return getattr(m, engine)
return __import__(engine)
except ImportError:
return False
def loads(s, **kwargs):
"""Loads JSON object."""
try:
return _engine[0](s)
except:
# crazy 2/3 exception hack
# http://www.voidspace.org.uk/python/weblog/arch_d7_2010_03_20.shtml
ExceptionClass, why = sys.exc_info()[:2]
if any([(issubclass(ExceptionClass, e)) for e in _engine[2]]):
raise JSONError(why)
else:
raise why
def dumps(o, **kwargs):
"""Dumps JSON object."""
try:
return _engine[1](o)
except:
ExceptionClass, why = sys.exc_info()[:2]
if any([(issubclass(ExceptionClass, e)) for e in _engine[2]]):
raise JSONError(why)
else:
raise why
class JSONError(ValueError):
"""JSON Failed."""
# ------
# Magic!
# ------
for e in options:
__engine = _import(e[0])
if __engine:
engine, _engine = e[0], e[1:4]
for i in (0, 1):
_engine[i] = getattr(__engine, _engine[i])
break
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