Implementing custom factory pattern in Spring - spring

Question

Normally if I want to implement a factory pattern I will do it like this.
public class CustomFactory(){
// pay attention: parameter is not a string
public MyService getMyService(Object obj){
/* depending on different combinations of fields in an obj the return
type will be MyServiceOne, MyServiceTwo, MyServiceThree
*/
}
}
MyServiceOne, MyServiceTwo, MyServiceThree are implementations of the interface MyService.
That will work perfectly fine.
But the issue is that I would like to have my objects instanciated by Spring container.
I've looked through some examples and I know how to make Spring container create my objects depending on a string.
The queston is: can I include implemenations of objects by Spring Container in this example or should I make all my manipulations with Object obj in some other place and write a method public MyService getMyService(String string) in my CumtomFactory?

Answer 1

Well what do you think about following way? :
public class CustomFactory {
// Autowire all MyService implementation classes, i.e. MyServiceOne, MyServiceTwo, MyServiceThree
#Autowired
#Qualifier("myServiceBeanOne")
private MyService myServiceOne; // with getter, setter
#Autowired
#Qualifier("myServiceBeanTwo")
private MyService myServiceTwo; // with getter, setter
#Autowired
#Qualifier("myServiceBeanThree")
private MyService myServiceThree; // with getter, setter
public MyService getMyService(){
// return appropriate MyService implementation bean
/*
if(condition_for_myServiceBeanOne) {
return myServiceOne;
}
else if(condition_for_myServiceBeanTwo) {
return myServiceTwo;
} else {
return myServiceThree;
}
*/
}
}
EDIT :
Answers to your questions in comment :
Isn't it the same with getting by String?
--> Yes definitely, you are getting those beans from Spring.
I mean how should my spring.xml look like?
--> See below xml :
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- services -->
<bean id="myServiceBeanOne"
class="com.comp.pkg.MyServiceOne">
<!-- additional collaborators and configuration for this bean go here -->
</bean>
<bean id="myServiceBeanTwo"
class="com.comp.pkg.MyServiceTwo">
<!-- additional collaborators and configuration for this bean go here -->
</bean>
<bean id="myServiceBeanThree"
class="com.comp.pkg.MyServiceThree">
<!-- additional collaborators and configuration for this bean go here -->
</bean>
<!-- more bean definitions for services go here -->
</beans>
And what should i do inside getMyService method? just return new MyServiceOne() and so on or what?
--> See getMyService() method in above code, it is updated.