groovy.lang
[Java] Interface Interceptor

public 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.

Authors:

Dierk Koenig

afterInvoke

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

This code is executed after the method is optionally called.

Parameters:

object - receiver object for the called method

methodName - name of the called method

arguments - arguments to the called method

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

Returns:

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.

Parameters:

object - receiver object for the method call

methodName - name of the method to call

arguments - arguments to the method call

Returns:

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()

Returns:

whether the target method should be invoked at all.

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