class SimpleMethodInvoker implements MethodInvoker {

	private final Object object;

	private final Method method;

	private final Class<?>[] parameterTypes;

	private volatile Object target;

	public SimpleMethodInvoker(Object object, Method method) {
		Assert.notNull(object, "Object to invoke must not be null");
		Assert.notNull(method, "Method to invoke must not be null");
		this.method = method;
		method.setAccessible(true);
		this.object = object;
		this.parameterTypes = method.getParameterTypes();
	}

	public SimpleMethodInvoker(Object object, String methodName, Class<?>... paramTypes) {
		Assert.notNull(object, "Object to invoke must not be null");
		Method method = ClassUtils.getMethodIfAvailable(object.getClass(), methodName, paramTypes);
		if (method == null) {
			// try with no params
			method = ClassUtils.getMethodIfAvailable(object.getClass(), methodName, new Class[] {});
		}

		Assert.notNull(method, "No methods found for name: [" + methodName + "] in class: [" + object.getClass()
				+ "] with arguments of type: [" + Arrays.toString(paramTypes) + "]");

		this.object = object;
		this.method = method;
		method.setAccessible(true);
		this.parameterTypes = method.getParameterTypes();
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see org.springframework.batch.core.configuration.util.MethodInvoker#invokeMethod
	 * (java.lang.Object[])
	 */
	@Override
	public Object invokeMethod(Object... args) {<FILL_FUNCTION_BODY>}

	private Object extractTarget(Object target, Method method) {
		if (this.target == null) {
			if (target instanceof Advised) {
				Object source;
				try {
					source = ((Advised) target).getTargetSource().getTarget();
				}
				catch (Exception e) {
					throw new IllegalStateException("Could not extract target from proxy", e);
				}
				if (source instanceof Advised) {
					source = extractTarget(source, method);
				}
				if (method.getDeclaringClass().isAssignableFrom(source.getClass())) {
					target = source;
				}
			}
			this.target = target;

		}
		return this.target;
	}

	@Override
	public boolean equals(Object obj) {
		if (!(obj instanceof SimpleMethodInvoker)) {
			return false;
		}

		if (obj == this) {
			return true;
		}
		SimpleMethodInvoker rhs = (SimpleMethodInvoker) obj;
		return (rhs.method.equals(this.method)) && (rhs.object.equals(this.object));
	}

	@Override
	public int hashCode() {
		int result = 25;
		result = 31 * result + this.object.hashCode();
		result = 31 * result + this.method.hashCode();
		return result;
	}

}

		Assert.state(this.parameterTypes.length == args.length,
				"Wrong number of arguments, expected no more than: [" + this.parameterTypes.length + "]");

		try {
			// Extract the target from an Advised as late as possible
			// in case it contains a lazy initialization
			Object target = extractTarget(this.object, this.method);
			return method.invoke(target, args);
		}
		catch (Exception e) {
			throw new IllegalArgumentException("Unable to invoke method: [" + this.method + "] on object: ["
					+ this.object + "] with arguments: [" + Arrays.toString(args) + "]", e);
		}
	
<no_super_class>