def set_patches(self, key, distance, patches):
'''Set the specified object attribute as a list of patches. distance
is a double. patches is a list of (upper_left_coord,
lower_right_coord) tuples, where a coordinate is an (x, y) tuple.
The key name should probably be _filter.%s.patches, where %s is the
filter name from Session.'''
self.set_binary(key,
PatchesAttributeCodec().encode((distance, patches)))
def _make_object_json(application, search_key, object_key, obj):
'''Convert an object attribute dict into a dict suitable for JSON
encoding.'''
result = {}
for k, v in obj.iteritems():
data = None
# Inline known attribute types that can be represented in JSON
if k.endswith('.int'):
data = IntegerAttributeCodec().decode(v)
elif k.endswith('.double'):
data = DoubleAttributeCodec().decode(v)
elif k.endswith('.patches'):
distance, patches = PatchesAttributeCodec().decode(v)
data = {
'distance':
distance,
'patches': [{
'x0': tl[0],
'y0': tl[1],
'x1': br[0],
'y1': br[1]
} for tl, br in patches],
}
else:
# Treat remaining attributes as strings if: they don't have
# a suffix representing a known binary type, they can be decoded
# by the string codec (i.e., their last byte is 0), they are
# valid UTF-8, and they are not the '' (object data) attribute.
try:
_base, suffix = k.rsplit('.', 1)
except ValueError:
suffix = None
try:
if k != '' and suffix not in ('jpeg', 'png', 'rgbimage',
'binary'):
data = StringAttributeCodec().decode(v).decode('UTF-8')
except ValueError:
pass
if data is not None:
result[k] = {
'data': data,
}
else:
result[k] = {
'raw_url':
application.reverse_url('attribute-raw', search_key,
object_key, k),
'image_url':
application.reverse_url('attribute-image', search_key,
object_key, k),
}
result['_ResultURL'] = {
'data': application.reverse_url('result', search_key, object_key),
}
_result_object_schema.validate(result)
return result
def get_patches(self, key):
'''Get the specified object attribute as a list of patches. Returns
(distance, patches), where patches is a tuple of (upper_left_coord,
lower_right_coord) tuples and a coordinate is an (x, y) tuple.'''
return PatchesAttributeCodec().decode(self.get_binary(key))