class DbDatasets(Datasets):
'''Implementation of Datasets API that retrieves information from a database back-end.'''
def __init__(self, db_path):
self.dataQuery = DataQuery(db_path=db_path)
def getDataTypes(self):
tuples = []
tuples.append( (VARIABLE, VARIABLE.capitalize()) ) # (key, label)
tuples.append( (PACKAGE, PACKAGE.capitalize()) ) # (key, label)
return tuples
def getDatasetOptions(self, data_type, long_name=None, time_frequency=None, dataset_category=None, dataset=None,
dataset_category2=None, package_name=None):
if data_type=='variable':
dict = self.dataQuery.get_variable_or_index('variable', long_name=long_name, time_frequency=time_frequency,
dataset_category=dataset_category, dataset=dataset)
elif data_type=='package':
dict = self.dataQuery.get_package(dataset_category=dataset_category2, package_name=package_name)
else:
raise Exception('Unsupported data type=%s' % data_type)
return dict
def getDatasets(self, data_type, long_name=None, time_frequency=None,
dataset_category=None, dataset=None, package_name=None):
'''Method to return the datasets for a given selection.
Returns a list of dictionaries, one for each dataset.'''
if data_type=='variable':
dictionaries = self.dataQuery.get_variable_or_index_dataset('variable', long_name=long_name, time_frequency=time_frequency,
dataset_category=dataset_category, dataset=dataset)
elif data_type=='package':
dictionaries = self.dataQuery.get_package_datasets(package_name=package_name)
else:
raise Exception("data_type=index not yet implemented")
return dictionaries
from ncpp.util.data_scanner.query import DataQuery from ncpp.constants import DATASETS_DB dataQuery = DataQuery(db_path=DATASETS_DB) dictionaries = dataQuery.get_package() print dictionaries
def __init__(self, db_path):
self.dataQuery = DataQuery(db_path=db_path)
from ncpp.util.data_scanner.query import DataQuery
from ncpp.constants import DATASETS_DB
dataQuery = DataQuery(db_path=DATASETS_DB)
data_type = 'variable'
long_name = 'Maximum Air Temperature'
time_frequency = 'Day'
dataset_category = 'Downscaled'
dataset = 'BCCA-CCCMA-CGCM3'
dictionaries = dataQuery.get_variable_or_index_dataset('variable', long_name=long_name, time_frequency=time_frequency,
dataset_category=dataset_category, dataset=dataset)
