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'''
Created on Mar 22, 2013
@author: steger
'''
from DataProcessing.DataError import DataError
#FIXME: this is a DataSource?
class Comparator(object):
'''
classdocs
'''
def __init__(self, datasource):
self._datasource = datasource
@property
def value(self):
raise DataError("Implement value property")
class IsPositive(Comparator):
'''
'''
@property
def name(self):
return "IsPositive(%s)" % self._datasource.name
@property
def value(self):
return self._datasource.value > 0
class IsNegative(Comparator):
'''
'''
@property
def name(self):
return "IsNegative(%s)" % self._datasource.name
@property
def value(self):
return self._datasource.value < 0
class IsNotPositive(Comparator):
'''
'''
@property
def name(self):
return "IsNotPositive(%s)" % self._datasource.name
@property
def value(self):
return self._datasource.value <= 0
class IsNotNegative(Comparator):
'''
'''
@property
def name(self):
return "IsNotNegative(%s)" % self._datasource.name
@property
def value(self):
return self._datasource.value >= 0
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