def _write_in_storage(self, inst, value):
"""
Store value on disk (in h5 file).
:param inst: Will give us the storage_path, it is a MappedType instance
:param value: expected to be of type self.wraps
:raises Exception : when passed value is incompatible (e.g. used with chunks)
"""
if self.trait.file_storage == FILE_STORAGE_NONE:
pass
elif self.trait.file_storage == FILE_STORAGE_DEFAULT:
inst.store_data(self.trait.name, value)
else:
raise StorageException("You should not use SET on attributes-to-be-stored-in-files!")
def _read_from_storage(self, inst):
"""
Call correct storage methods, and validation
:param inst: Will give us the storage_path, it is a MappedType instance
:returns: entity of self.wraps type
:raises: Exception when used with chunks
"""
if self.trait.file_storage == FILE_STORAGE_NONE:
return None
elif self.trait.file_storage == FILE_STORAGE_DEFAULT:
try:
return inst.get_data(self.trait.name, ignore_errors=True)
except StorageException as exc:
self.logger.debug("Missing dataSet " + self.trait.name)
self.logger.debug(exc)
return numpy.ndarray(0)
else:
raise StorageException("Use get_data(_, slice) not full GET on attributes-stored-in-files!")
:param inst: Will give us the storage_path, it is a MappedType instance
:returns: entity of self.wraps type
:raises: Exception when used with chunks
"""
if self.trait.file_storage == FILE_STORAGE_NONE:
return None
elif self.trait.file_storage == FILE_STORAGE_DEFAULT:
try:
return inst.get_data(self.trait.name, ignore_errors=True)
except StorageException, exc:
self.logger.debug("Missing dataSet " + self.trait.name)
self.logger.debug(exc)
return numpy.ndarray(0)
else:
raise StorageException(
"Use get_data(_, slice) not full GET on attributes-stored-in-files!"
)
class SparseMatrix(mapped.SparseMatrix, Array):
def _read_from_storage(self, inst):
"""
Overwrite method from superclass, and call Sparse_Matrix specific reader.
"""
try:
return self._read_sparse_matrix(inst, self.trait.name)
except StorageException, exc:
self.logger.debug("Missing dataSet " + self.trait.name)
self.logger.debug(exc)
return None