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#!/usr/bin/env python
# This file is part of Diamond.
#
# Diamond is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Diamond is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Diamond. If not, see <http://www.gnu.org/licenses/>.
class List:
def __init__(self, datatype, cardinality=''):
self.datatype = datatype
self.cardinality = cardinality
# The input to call is a string containing a list of elements seperated by "," or " ". It
# returns a string, containing the elements in val seperated by " ".
def __call__(self, val):
val = val.strip()
if "," in val:
x = val.split(",")
else:
x = val.split(" ")
# Perform some checks on the list cardinality, for oneOrMore elements ('+')
# and compulsory elements ('').
if self.cardinality == '+':
assert len(x) > 0
elif self.cardinality == '':
assert len(x) == 1
# Check the list cardinality (as an integer) matches up with the number of elements
# in the seperated val string.
try:
assert len(x) == int(self.cardinality)
except ValueError:
pass # The int conversion may fail (if cardinality is '+' or ''), so just ignore it.
# Make sure each element can be converted to type 'self.datatype'. An exception will be
# thrown if this is not possible.
for y in x:
z = self.datatype(y)
# Return a string of the elements in val, seperated by " ".
return " ".join(x)
def __str__(self):
return "list of " + str(self.datatype) + " of cardinality: " + self.cardinality
def __repr__(self):
return "list of " + str(self.datatype) + " of cardinality: " + self.cardinality
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