English | Chinese

ximplementation-spring

Ximplementation-spring is a library that lets you use ximplementation in Spring, makes Spring support multiple dependency injection and more ximplementation features.

The class org.ximplementation.spring.ImplementeeBeanCreationPostProcessor is a BeanPostProcessor for creating ximplementation dependency beans in Spring.

Simply add the following content

<bean class="org.ximplementation.spring.ImplementeeBeanCreationPostProcessor"/>

to applicationContext.xml, then your Spring project will be able to support multiple dependency injection and more ximplementation features.

Example

You can write Spring components like this:

	@Component
	public class Controller
	{
		@Autowired
		private Service service;
		
		public String handle(Number number)
		{
			return this.service.handle(number);
		}
	}
	
	public interface Service
	{
		String handle(Number number);
	}
	
	@Component
	public class ServiceImplDefault implements Service
	{
		public String handle(Number number){...}
	}
	
	@Component
	public class ServiceImplAnother implements Service
	{
		@Validity("isValid")
		public String handle(Number number){...}
	
		public boolean isValid(Number number){ return number.intValue() > 0; }
	}
	
	@Component
	@Implementor(Service.class)
	public class ServiceImplInteger
	{
		@Implement
		public String handle(Integer number){...}
	}

The Controller.service will be injected successfully though there are two instances, and its handle method invocation will be delegated to ServiceImplInteger when the parameter type is Integer, to ServiceImplAnother when the parameter is greater than 0, to ServiceImplDefault otherwise.