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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
|
##############################################################################
# Copyright by The HDF Group. #
# All rights reserved. #
# #
# This file is part of the HDF Compass Viewer. The full HDF Compass #
# copyright notice, including terms governing use, modification, and #
# terms governing use, modification, and redistribution, is contained in #
# the file COPYING, which can be found at the root of the source code #
# distribution tree. If you do not have access to this file, you may #
# request a copy from help@hdfgroup.org. #
##############################################################################
import posixpath as pp
import numpy as np
import pydap as dap
from pydap.client import open_url
import logging
logger = logging.getLogger(__name__)
logger.addHandler(logging.NullHandler())
from hdf_compass import compass_model
def check_key(key, dataset):
if '/' not in key:
return key, dataset
new_dataset = dataset[key.split('/')[0]]
return key.split('/')[1], new_dataset
class Server(compass_model.Store):
""" Represents the remote OpENDAP server to be accessed """
@staticmethod
def plugin_name():
return "OpENDAP"
@staticmethod
def plugin_description():
return "A plugin used to access OpENDAP Servers."
def __contains__(self, key):
if '/' not in key:
return key in self.dataset
new_dset = self.dataset[key.split('/')[0]]
new_key = key.rsplit('/')[1]
return new_key in new_dset
@staticmethod
def can_handle(url):
try:
flag = isinstance(open_url(url), dap.model.DatasetType)
logger.debug("able to handle %s? %r" % (url, flag))
return flag
except Exception:
logger.debug("able to handle %s? no" % url)
return False
def __init__(self, url):
if not self.can_handle(url):
raise ValueError(url)
self._url = url
self._valid = True
self._dataset = open_url(self.url)
self._datalength = len(self._dataset.data)
self._dataset.setdefault('')
def close(self):
self._valid = False
def get_parent(self, key):
return None
@property
def url(self):
return self._url
@property
def display_name(self):
return self.dataset.name
@property
def root(self):
return self['']
@property
def valid(self):
return self._valid
@property
def dataset(self):
return self._dataset
@property
def datalength(self):
return self._datalength
class Dataset(compass_model.Container):
""" Represents Dataset/DatasetType Object in OpENDAP/Pydap. """
class_kind = "Dataset"
def __len__(self):
return self._store.datalength
def __getitem__(self, index):
name = self._dset.keys()[index]
return self.store[pp.join(self.key, name)]
def __iter__(self):
pass
@staticmethod
def can_handle(store, key):
return key == ''
def __init__(self, store, key):
if not key == '':
raise ValueError("A Dataset object may only represent the root group")
self._store = store
self._key = key
self._url = store.url
self._dset = store.dataset
@property
def key(self):
return self._key
@property
def store(self):
return self._store
@property
def display_name(self):
return self._dset.name
@property
def description(self):
return "A Pydap DatasetType Object."
@property
def dset(self):
return self._dset
class Structure(compass_model.Container):
""" Represents Structure/StructureType Object in OpENDAP/Pydap. """
class_kind = "Structure/Grid/Sequence"
def __len__(self):
return len(self._dset.data)
def __getitem__(self, index):
name = self._dset.keys()[index]
return self.store[pp.join(self.key, name)]
def __iter__(self):
pass
@staticmethod
def can_handle(store, key):
new_key, new_dset = check_key(key, store.dataset)
try:
return new_key in new_dset and isinstance(new_dset[new_key], dap.model.StructureType)
except isinstance(new_dset[new_key], dap.model.DatasetType):
return False
def __init__(self, store, key):
new_key, new_dset = check_key(key, store.dataset)
self._store = store
self._key = new_key
self._url = store.url
self._dset = new_dset[new_key]
@property
def key(self):
return self._key
@property
def store(self):
return self._store
@property
def display_name(self):
return self._dset.name
@property
def description(self):
return "A Pydap StructureType Object."
class Base(compass_model.Array):
""" Represents Array/BaseType Object in OpENDAP/Pydap. """
class_kind = "Array"
@property
def shape(self):
return self._shape
@property
def dtype(self):
return np.dtype(self._dtype.typecode)
def __getitem__(self, index):
return self._data[index]
@staticmethod
def can_handle(store, key):
new_key, new_dset = check_key(key, store.dataset)
return new_key in new_dset and isinstance(new_dset[new_key], dap.model.BaseType)
def __init__(self, store, key):
new_key, new_dset = check_key(key, store.dataset)
self._store = store
self._key = new_key
self._url = store.url
self._id = new_dset[new_key].id
self._shape = new_dset[new_key].shape
self._dtype = new_dset[new_key].type
self._name = new_dset[new_key].name
self._data = new_dset[new_key].data
@property
def key(self):
return self._key
@property
def store(self):
return self._store
@property
def display_name(self):
return self._name
@property
def description(self):
return "A Pydap BaseType Object."
def is_plottable(self):
if self.dtype.kind == 'S':
logger.debug("Not plottable since ASCII String (characters: %d)" % self.dtype.itemsize)
return False
if self.dtype.kind == 'U':
logger.debug("Not plottable since Unicode String (characters: %d)" % self.dtype.itemsize)
return False
return True
class Attributes(compass_model.KeyValue):
""" Represents the Attributes member of Pydap Objects. """
class_kind = "Attributes"
@property
def keys(self):
return self._keys.keys()
def __getitem__(self, name):
return self._keys[name]
@staticmethod
def can_handle(store, key):
new_key, new_dset = check_key(key, store.dataset)
return new_key != ''
def __init__(self, store, key):
new_key, new_dset = check_key(key, store.dataset)
self._store = store
self._key = new_key
self._keys = new_dset[self._key].attributes
@property
def key(self):
return self._key
@property
def store(self):
return self._store
@property
def display_name(self):
return "%s Attributes" % self._key
@property
def description(self):
return "Attributes of %s" % self._key
# Register Handlers
Server.push(Attributes)
Server.push(Dataset)
Server.push(Structure)
Server.push(Base)
compass_model.push(Server)
|
