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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
class iRODSMeta:
def __init__(
self, name, value, units=None, avu_id=None, create_time=None, modify_time=None
):
self.avu_id = avu_id
self.name = name
self.value = value
self.units = units
self.create_time = create_time
self.modify_time = modify_time
def __eq__(self, other):
return tuple(self) == tuple(other)
def __iter__(self):
yield self.name
yield self.value
if self.units:
yield self.units
def __repr__(self):
return "<iRODSMeta {avu_id} {name} {value} {units}>".format(**vars(self))
class BadAVUOperationKeyword(Exception):
pass
class BadAVUOperationValue(Exception):
pass
class AVUOperation(dict):
@property
def operation(self):
return self["operation"]
@operation.setter
def operation(self, Oper):
self._check_operation(Oper)
self["operation"] = Oper
@property
def avu(self):
return self["avu"]
@avu.setter
def avu(self, newAVU):
self._check_avu(newAVU)
self["avu"] = newAVU
def _check_avu(self, avu_param):
if not isinstance(avu_param, iRODSMeta):
error_msg = (
"Nonconforming avu {!r} of type {}; must be an iRODSMeta."
"".format(avu_param, type(avu_param).__name__)
)
raise BadAVUOperationValue(error_msg)
def _check_operation(self, operation):
if operation not in ("add", "remove"):
error_msg = (
"Nonconforming operation {!r}; must be 'add' or 'remove'.".format(
operation
)
)
raise BadAVUOperationValue(error_msg)
def __init__(self, operation, avu, **kw):
"""Constructor:
AVUOperation( operation = opstr, # where opstr is "add" or "remove"
avu = metadata ) # where metadata is an irods.meta.iRODSMeta instance
"""
super(AVUOperation, self).__init__()
self._check_operation(operation)
self._check_avu(avu)
if kw:
raise BadAVUOperationKeyword(
"""Nonconforming keyword (s) {}.""".format(list(kw.keys()))
)
for atr in ("operation", "avu"):
setattr(self, atr, locals()[atr])
import copy
class iRODSMetaCollection:
def __call__(self, admin=False, timestamps=False, **opts):
x = copy.copy(self)
x._manager = (x._manager)(admin, timestamps, **opts)
x._reset_metadata()
return x
def __init__(self, manager, model_cls, path):
self._manager = manager
self._model_cls = model_cls
self._path = path
self._reset_metadata()
def _reset_metadata(self):
self._meta = self._manager.get(self._model_cls, self._path)
def get_all(self, key):
"""
Returns a list of iRODSMeta associated with a given key
"""
if isinstance(key, bytes):
key = key.decode("utf8")
if not isinstance(key, str):
raise TypeError
return [m for m in self._meta if m.name == key]
def get_one(self, key):
"""
Returns the iRODSMeta defined for a key. If there are none,
or if there are more than one defined, raises KeyError
"""
values = self.get_all(key)
if not values:
raise KeyError
if len(values) > 1:
raise KeyError
return values[0]
def _get_meta(self, *args):
if not len(args):
raise ValueError("Must specify an iRODSMeta object or key, value, units)")
return args[0] if len(args) == 1 else iRODSMeta(*args)
def apply_atomic_operations(self, *avu_ops):
self._manager.apply_atomic_operations(self._model_cls, self._path, *avu_ops)
self._reset_metadata()
def set(self, *args, **opts):
"""
Set as iRODSMeta to a key
"""
meta = self._get_meta(*args)
self._manager.set(self._model_cls, self._path, meta, **opts)
self._reset_metadata()
def add(self, *args, **opts):
"""
Add as iRODSMeta to a key
"""
meta = self._get_meta(*args)
self._manager.add(self._model_cls, self._path, meta, **opts)
self._reset_metadata()
def remove(self, *args, **opts):
"""
Removes an iRODSMeta
"""
meta = self._get_meta(*args)
self._manager.remove(self._model_cls, self._path, meta, **opts)
self._reset_metadata()
def items(self):
"""
Returns a list of iRODSMeta
"""
return self._meta
def keys(self):
"""
Return a list of keys. Duplicates preserved
"""
return [m.name for m in self._meta]
def __len__(self):
return len(self._meta)
def __getitem__(self, key):
"""
Returns the first iRODSMeta defined on key. Order is
undefined. Use get_one() or get_all() instead
"""
values = self.get_all(key)
if not values:
raise KeyError
return values[0]
def __setitem__(self, key, meta):
"""
Deletes all existing values associated with a given key and associates
the key with a single iRODSMeta tuple
"""
self._delete_all_values(key)
self.add(meta)
def _delete_all_values(self, key):
for meta in self.get_all(key):
self.remove(meta)
def __delitem__(self, key):
"""
Deletes all existing values associated with a given key
"""
if not isinstance(key, str):
raise TypeError
self._delete_all_values(key)
self._reset_metadata()
def __contains__(self, key):
if not isinstance(key, str):
raise TypeError
values = self.get_all(key)
return len(values) > 0
def remove_all(self, **opts):
for meta in self._meta:
self._manager.remove(self._model_cls, self._path, meta, **opts)
self._reset_metadata()
|
