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To register a customized ObjectFactory, add or edit an entry in struts.properties

 struts.objectFactory=foo.bar.MyCustomObjectFactory

where foo.bar.MyCustomObjectFactory is the custom object factory.

public class MyObjectFactory extends ObjectFactory {
    .....
}

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If you want to just extend one part of ObjectFactory, ie. to change how Result Types are build, you can implement ResultFactory interface and register it with dedicated name, see Extension Points for more details. Original ObjectFactory will use these dedicated factories to do the work. It's already done this way - the original functionality of ObjectFactory was extracted to separated classes which implements the interfaces below. Check the source of ObjectFactory to see more details. All these factories are available as from version 2.3.16.

List of Factory interfaces:

• ResultFactory - dedicated interfaces used by ObjectFactory to create Result Types
  • StrutsResultFactory it's internal implementation which checks if Result implements ParamNameAwareResult interface to restrict names of parameters set on the instance of Result, see Result Types for more info.
• ActionFactory - dedicated interface used by ObjectFactory to actions
• InterceptorFactory - dedicated interface used by ObjectFactory to create interceptors
• ValidatorFactory - dedicated interface used by ObjectFactory to create validators
• ConverterFactory - dedicated interface used by ObjectFactory to create instances of TypeConverter
• UnknownHandlerFactory - dedicated interfaces used by ObjectFactory to create instances of Unknown Handlers (as from version 2.3.18)

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