groovy.lang
Interface Interceptor

interface Interceptor

Implementers of this interface can be registered in the ProxyMetaClass for notifications about method calls for objects managed by the ProxyMetaClass. See groovy/lang/InterceptorTest.groovy for details.

author:

Dierk Koenig

afterInvoke

public Object afterInvoke(Object object, String methodName, Object[] arguments, Object result)

This code is executed after the method is optionally called.

param:

object receiver object for the called method

param:

methodName name of the called method

param:

arguments arguments to the called method

param:

result result of the executed method call or result of beforeInvoke if method was not called

return:

any arbitrary result that can replace the result of the original method call. Typically, the result parameter is returned.

beforeInvoke

public Object beforeInvoke(Object object, String methodName, Object[] arguments)

This code is executed before the method is optionally called.

param:

object receiver object for the method call

param:

methodName name of the method to call

param:

arguments arguments to the method call

return:

any arbitrary result that replaces the result of the original method call only if doInvoke() returns false and afterInvoke() relays this result.

doInvoke

public boolean doInvoke()

return:

whether the target method should be invoked at all.

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