try to execute a method on target, if method does not exist, try its parent class if not found, do nothing. - Java Reflection

Java examples for Reflection:Method

  1. HOME
  2. Java
  3. Reflection
  4. Method

Description

try to execute a method on target, if method does not exist, try its parent class if not found, do nothing.

Demo Code


//package com.java2s;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Main {


    /**/*  www  .ja  v  a 2  s  .  c o  m*/
     * try to execute a method on target, if method does not exist, try its parent class
     * if not found, do nothing. Dispatched methods may throw an exception.
     * @throws RuntimeException, if invoked method throws an exception, the thrown exception is given up by this function as a runtime exception
     * @throws IllegalAccessException, if dispatch failed because of reflection reasons
     */
    public static Object silentDispatch(final Object target,
            final String methodName, Object parameter)
            throws RuntimeException {
        Object result = null;

        Class<?> targetClass = target.getClass();
        Class<?> parameterClass = parameter.getClass();

        while (targetClass != null) {
            try {
                Method method = target.getClass().getMethod(methodName,
                        parameterClass);
                result = method.invoke(target, parameter);
                break;
            } catch (NoSuchMethodException e) {
                targetClass = targetClass.getSuperclass();
            } catch (InvocationTargetException e) {
                throw new RuntimeException(e.getTargetException());
            } catch (IllegalAccessException e) {
                throw new RuntimeException(
                        "Got IllegalAccessException during call "
                                + methodName, e);
            }
        }
        return result;

    }
}

Related Tutorials