Python 代码：
# Filter Pattern with Python Code
from abc import abstractmethod,ABCMeta
# 创建一个类，在该类上应用标准
class Person():
_name = ""
_gender = ""
_maritalStatus = ""
def __init__(self,inName,inGender,inMaritalStatus):
self._name = inName
self._gender = inGender
self._maritalStatus = inMaritalStatus
def getName(self):
return self._name
def getGender(self):
return self._gender
def getMaritalStatus(self):
return self._maritalStatus
@staticmethod
def printPersons(inPersons):
for aPerson in inPersons:
print("Person : [ Name : {0}, Gender : {1}, Marital Status : {2}]".format(aPerson.getName(),aPerson.getGender(),aPerson.getMaritalStatus()))
# 为标准(Criteria)创建一个接口
class Criteria(metaclass=ABCMeta):
@abstractmethod
def meetCriteria(self,inPersons):
pass
# 创建实现了Criteria接口的实体类
class CriteriaMale(Criteria):
def meetCriteria(self,inPersons):
malePersons = []
for aPerson in inPersons:
if aPerson.getGender().upper() == "MALE":
malePersons.append(aPerson)
return malePersons
class CriteriaFemale(Criteria):
def meetCriteria(self,inPersons):
femalePersons = []
for aPerson in inPersons:
if aPerson.getGender().upper() == "FEMALE":
femalePersons.append(aPerson)
return femalePersons
class CriteriaSingle(Criteria):
def meetCriteria(self,inPersons):
singlePersons = []
for aPerson in inPersons:
if aPerson.getMaritalStatus().upper() == "SINGLE":
singlePersons.append(aPerson)
return singlePersons
class AndCriteria(Criteria):
_criteria = None
_otherCriteria = None
def __init__(self,inCriteria,inOtherCriteria):
self._criteria = inCriteria
self._otherCriteria = inOtherCriteria
def meetCriteria(self,inPersons):
# 获得第一次过滤结果
firstCriteriaPerson = self._criteria.meetCriteria(inPersons)
# 返回第二次过滤结果
return self._otherCriteria.meetCriteria(firstCriteriaPerson)
class OrCriteria(Criteria):
_criteria = None
_otherCriteria = None
def __init__(self, inCriteria, inOtherCriteria):
self._criteria = inCriteria
self._otherCriteria = inOtherCriteria
def meetCriteria(self,inPersons):
#先用Criteria分别构造数据
firstCriteriaItems = self._criteria.meetCriteria(inPersons)
otherCriteriaItems = self._otherCriteria.meetCriteria(inPersons)
# 完成或运算
for aPerson in otherCriteriaItems:
if aPerson not in firstCriteriaItems :
firstCriteriaItems.append(aPerson)
return firstCriteriaItems
# 调用输出
if __name__ == '__main__':
persons = []
persons.append(Person("Robert","Male","Single"))
persons.append(Person("John", "Male", "Married"))
persons.append(Person("Laura", "Female", "Married"))
persons.append(Person("Diana", "Female", "Single"))
persons.append(Person("Mike", "Male", "Single"))
persons.append(Person("Bobby", "Male", "Single"))
male = CriteriaMale() female = CriteriaFemale()
single = CriteriaSingle()
singleMale = AndCriteria(single, male)
singleOrFemale = OrCriteria(single,female)
print("Males: ")
Person.printPersons(male.meetCriteria(persons))
print("\nFemales: ")
Person.printPersons(female.meetCriteria(persons))
print("\nSingle: ")
Person.printPersons(single.meetCriteria(persons))
print("\nSingle Males: ")
Person.printPersons(singleMale.meetCriteria(persons))
print("\nSingle or Female:")
Person.printPersons(singleOrFemale.meetCriteria(persons))
Siskin.xu
Siskin.xu
sis***@sohu.com11个月前 (03-11)