root / kamaki / clients / commissioning / utils / argmap.py @ 24ff0a35
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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try:
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from collections import OrderedDict |
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except ImportError: |
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from kamaki.clients.commissioning.utils.ordereddict import OrderedDict |
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from itertools import chain |
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from cStringIO import StringIO |
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ARGMAP_MAGIC = '[=ARGMAP=]'
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class arguments(object): |
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__slots__ = ('args', 'kw') |
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def __init__(self, *args, **kwargs): |
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self.args = list(args) |
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kw = OrderedDict() |
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kwitems = kw.pop('kwitems', None) |
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if kwitems is not None: |
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kw.update(kwitems) |
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kw.update(kwargs) |
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self.kw = kw
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def __str__(self): |
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return str(self.args) + '+' + str(self.kw) |
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def __repr__(self): |
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return repr(self.args) + '+' + repr(self.kw) |
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def __getitem__(self, key): |
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if (isinstance(key, int)) or ( |
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isinstance(key, long)) or ( |
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isinstance(key, slice)): |
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return self.args[key] |
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else:
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return self.kw[key] |
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def __setitem__(self, key, value): |
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if (isinstance(key, int)) or ( |
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isinstance(key, long)) or ( |
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isinstance(key, slice)): |
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self.args[key] = value
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else:
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self.kw[key] = value
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def __delitem__(self, key): |
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if (isinstance(key, int)) or ( |
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isinstance(key, long)) or ( |
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isinstance(key, slice)): |
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del self.args[key] |
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else:
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del self.kw[key] |
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def iteritems(self): |
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for item in self.args: |
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yield None, item |
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for k, v in self.kw: |
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yield k, v
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def items(self): |
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return list(self.iteritems()) |
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def iterkeys(self): |
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return self.kw.iterkeys() |
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def keys(self): |
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return self.kw.keys() |
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def itervalues(self): |
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return chain(self.args, self.kw.itervalues()) |
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def values(self): |
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return list(self.itervalues) |
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def append(self, value): |
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self.args.append(value)
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def argmap_encode(obj, output): |
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if obj is None: |
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output('[=null]')
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return
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if isinstance(obj, basestring): |
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if not obj: |
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output('""')
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if isinstance(obj, unicode): |
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obj = obj.encode('utf-8')
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output('"')
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start = 0
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while 1: |
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end = obj.find(start) + 1
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if end < 0: |
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break
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output(obj[start:end] + '"')
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start = end |
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output(obj[start:]) |
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output('"')
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return
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if isinstance(obj, int) or isinstance(obj, long): |
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output(str(obj))
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return
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if hasattr(obj, 'iteritems'): |
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output('[')
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once = 1
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for k, v in obj.iteritems(): |
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if once:
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once = 0
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else:
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output(' ')
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if k is not None: |
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argmap_encode(k) |
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output('=')
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argmap_encode(v) |
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output(']')
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if hasattr(obj, '__iter__'): |
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output('[')
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once = 1
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for item in obj: |
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if once:
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once = 0
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else:
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output(' ')
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argmap_encode(item) |
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output(']')
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m = "Unsupported type '%s'" % (type(obj)) |
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m += ''
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def argmap_decode(inputf, s=None): |
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if isinstance(inputf, str): |
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inputf = StringIO(inputf).read |
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if s is None: |
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s = inputf(1)
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while 1: |
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if not s.isspace(): |
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break
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s = inputf(1)
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item = ''
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if s == '"': |
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s = inputf(1)
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while 1: |
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if s == '"': |
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s = inputf(1)
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if s != '"': |
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return item, s
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item += s |
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s = inputf(1)
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elif s == '[': |
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item, s = argmap_decode_args(inputf) |
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return item, s
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else:
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while 1: |
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item += s |
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s = inputf(1)
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if s in ' =]': |
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return item, s
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def argmap_decode_atom(inputf): |
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s = inputf(4)
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if s != 'null': |
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m = "Invalid atom '%s'" % (s,)
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raise ValueError(m) |
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return None, None |
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def argmap_decode_args(inputf): |
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args = [] |
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append = args.append |
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s = inputf(1)
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key = None
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while 1: |
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if s is None: |
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s = inputf(1)
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if s == ']': |
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if key is not None: |
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append((None, key))
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args.append(ARGMAP_MAGIC) |
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return args, None |
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if s == '=': |
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if key is None: |
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atom, s = argmap_decode_atom(inputf) |
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append((None, atom))
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else:
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value, s = argmap_decode(inputf) |
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append((key, value)) |
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key = None
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elif s == ' ': |
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if key is not None: |
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append((None, key))
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key = None
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s = inputf(1)
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elif s == '': |
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m = "EOF while scanning for ']'"
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raise ValueError(m) |
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else:
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if key is not None: |
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append((None, key))
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key, s = argmap_decode(inputf, s=s) |
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def argmap_check(obj): |
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if hasattr(obj, 'keys') and callable(obj.keys): |
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# this could cover both cases
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return ARGMAP_MAGIC in obj |
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if hasattr(obj, '__len__'): |
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length = len(obj)
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return length and obj[length - 1] == ARGMAP_MAGIC |
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return False |
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def argmap_unzip_dict(argmap): |
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if not hasattr(argmap, 'keys'): |
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m = "argmap unzip dict: not a dict"
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raise TypeError(m) |
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if ARGMAP_MAGIC not in argmap: |
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m = "argmap unzip dict: magic not found"
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raise ValueError(m) |
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args = argmap.pop(None, [])
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kw = OrderedDict(argmap) |
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del kw[ARGMAP_MAGIC]
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return args, kw
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def argmap_unzip_list(argmap): |
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if not argmap or argmap.pop() != ARGMAP_MAGIC: |
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m = "argmap unzip list: magic not found"
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raise ValueError(m) |
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args = [] |
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append = args.append |
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kw = OrderedDict() |
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for k, v in argmap: |
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if k is None: |
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append(v) |
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else:
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kw[k] = v |
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return args, kw
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def argmap_unzip(argmap): |
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if hasattr(argmap, 'keys'): |
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return argmap_unzip_dict(argmap)
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elif hasattr(argmap, '__iter__'): |
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return argmap_unzip_list(argmap)
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else:
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m = "argmap: cannot unzip type %s" % (type(argmap),) |
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raise ValueError(m) |
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def argmap_zip_list(args, kw): |
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return [(None, a) for a in args] + kw.items() + [ARGMAP_MAGIC] |
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def argmap_zip_dict(args, kw): |
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argmap = OrderedDict() |
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argmap.update(kw) |
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argmap[ARGMAP_MAGIC] = ARGMAP_MAGIC |
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argmap[None] = list(args) + (argmap[None] if None in argmap else []) |
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return argmap
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argmap_zip = argmap_zip_list |
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def argmap_list_to_dict(argmap): |
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args, kw = argmap_unzip_list(argmap) |
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kw[ARGMAP_MAGIC] = ARGMAP_MAGIC |
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kw[None] = args
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return kw
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def argmap_dict_to_list(argmap): |
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args, kw = argmap_unzip_dict(argmap) |
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return args + kw.items() + [ARGMAP_MAGIC]
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def argmap_unpack_list(argmap): |
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kw = argmap_list_to_dict(argmap) |
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if len(kw) == 2: |
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return kw[None] |
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return kw
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def argmap_unpack_dict(argmap): |
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if hasattr(argmap, 'keys') and callable(argmap.keys): |
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return argmap_dict_to_list(argmap)[:-1] |
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return argmap[:-1] |