67 lines
1.5 KiB
Python
67 lines
1.5 KiB
Python
try:
|
|
import _dbapi
|
|
except ImportError:
|
|
import _nullapi as _dbapi
|
|
from _dbapi import _Field, _Record
|
|
|
|
_rec_cache = {}
|
|
|
|
__all__ = [
|
|
'Record',
|
|
'Field',
|
|
]
|
|
|
|
def getRecord(name):
|
|
try:
|
|
return _rec_cache[name]
|
|
except KeyError:
|
|
rec = Record(name)
|
|
_rec_cache[name] = rec
|
|
return rec
|
|
|
|
class Record(_Record):
|
|
def __init__(self, *args, **kws):
|
|
super(Record, self).__init__(*args, **kws)
|
|
self._fld_cache = {}
|
|
def field(self, name):
|
|
"""Lookup field in this record
|
|
|
|
fld = rec.field('HOPR')
|
|
"""
|
|
try:
|
|
return self._fld_cache[name]
|
|
except KeyError:
|
|
fld = Field("%s.%s"%(self.name(), name))
|
|
self._fld_cache[name] = fld
|
|
return fld
|
|
|
|
def __repr__(self):
|
|
return 'Record("%s")'%self.name()
|
|
|
|
class Field(_Field):
|
|
@property
|
|
def record(self):
|
|
"""Fetch the record associated with this field
|
|
"""
|
|
try:
|
|
return self._record
|
|
except AttributeError:
|
|
rec, _ = self.name()
|
|
self._record = getRecord(rec)
|
|
return self._record
|
|
|
|
def __repr__(self):
|
|
return 'Field("%s.%s")'%self.name()
|
|
|
|
def processLink(name, lstr):
|
|
"""Process the INP or OUT link
|
|
|
|
Expects lstr to be "module arg1 arg2"
|
|
|
|
Returns (callable, Record, "arg1 arg2")
|
|
"""
|
|
rec = getRecord(name)
|
|
modname, factname, args = lstr.split(None,2)
|
|
mod = __import__(modname)
|
|
return rec, mod.build(rec, args)
|