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interface injection

Posted on 2011-09-06
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I would like to know interface injection. I was reading as
Interface Injection-- Injection is done through an interface which is not supported in spring. I am not clear on this concept. why spring does not support it. what are the advantages, disadvantages, uses of it. when where how we use it. thanks in advance
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Question by:gudii9
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read about interface inection in general here:
http://blogs.oracle.com/jrose/entry/interface_injection_in_the_vm


and as it realtes to Spring here:

http://namanmehta.blogspot.com/2010/01/interface.html
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>>>There are three types of Dependency Injections.

Type 1 IOC also called Interface Injection In Type 1 IOC the injection is done though an interface. The interface will define the injection method and the implementation class has to implement this interface and provide concrete implementation for the injection method.
Type 2 IOC also called Setter Injection In Type 2 IOC the injection is done via a setter method. Type 2 IOC uses setter methods to get the dependent classes it needs.
Type 3 IOC also called Constructor Injection. In Type 3 IOC implementing class defines a constructor to get all its dependents. The dependent classes are defined in the constructor arguments.





are they only 3 tyoes. I remember reading more than 3. please advise
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