## org.springframework.aop
Interface IntroductionAdvisor

All Superinterfaces:
  Advisor, IntroductionInfo

All Known Implementing Classes:
  DeclareParentsAdvisor, DefaultIntroductionAdvisor

    public interface IntroductionAdvisor

extends Advisor, IntroductionInfo

Superinterface for advisors that perform one or more AOP introductions.

This interface cannot be implemented directly; subinterfaces must provide the advice type implementing the introduction.

Introduction is the implementation of additional interfaces (not implemented by a target) via AOP advice.

Since:
  04.04.2003
Author:
  Rod Johnson
See Also:
  `IntroductionInterceptor`

Method Summary
`ClassFilter` `getClassFilter()` Return the filter determining which target classes this introduction should apply to.
`void` `validateInterfaces()` Can the advised interfaces be implemented by the introduction advice? Invoked before adding an IntroductionAdvisor.

Methods inherited from interface org.springframework.aop.Advisor
`getAdvice, isPerInstance`

Methods inherited from interface org.springframework.aop.IntroductionInfo
`getInterfaces`

Method Detail

### getClassFilter

    ClassFilter getClassFilter()

  Return the filter determining which target classes this introduction should apply to.

  This represents the class part of a pointcut. Note that method matching doesn't make sense to introductions.

  Returns:
    the class filter

### validateInterfaces

    void validateInterfaces()
                            throws IllegalArgumentException

  Can the advised interfaces be implemented by the introduction advice? Invoked before adding an IntroductionAdvisor.

  Throws:
    `IllegalArgumentException` - if the advised interfaces can't be implemented by the introduction advice