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from functools import wraps
from Orange.widgets.utils.messages import UnboundMsg
from Orange.data import Table
from Orange.data.sql.table import SqlTable, AUTO_DL_LIMIT
_download_sql_data = UnboundMsg(
"Download (and sample if necessary) the SQL data first")
def check_sql_input(f):
"""
Wrapper for widget's set_data method that first checks if the input
is a SqlTable and:
- if small enough, download all data and convert to Table
- for large sql tables, show an error
:param f: widget's `set_data` method to wrap
:return: wrapped method that handles SQL data inputs
"""
@wraps(f)
def new_f(widget, data, *args, **kwargs):
widget.Error.add_message("download_sql_data", _download_sql_data)
widget.Error.download_sql_data.clear()
if isinstance(data, SqlTable):
if data.approx_len() < AUTO_DL_LIMIT:
data = Table(data)
else:
widget.Error.download_sql_data()
data = None
return f(widget, data, *args, **kwargs)
return new_f
def check_sql_input_sequence(f):
"""
Wrapper for widget's set_data/insert_data methodss that first checks
if the input is a SqlTable and:
- if small enough, download all data and convert to Table
- for large sql tables, show an error
:param f: widget's `set_data` method to wrap
:return: wrapped method that handles SQL data inputs
"""
@wraps(f)
def new_f(widget, index, data, *args, **kwargs):
widget.Error.add_message("download_sql_data", _download_sql_data)
widget.Error.download_sql_data.clear()
if isinstance(data, SqlTable):
if data.approx_len() < AUTO_DL_LIMIT:
data = Table(data)
else:
widget.Error.download_sql_data()
data = None
return f(widget, index, data, *args, **kwargs)
return new_f
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