/*
* Copyright 1999-2012 Alibaba Group.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* (created at 2011-6-2)
*/
package com.alibaba.cobar.parser.codegen;
/**
* @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
*/
public class Solo {
/**
* @param args
*/
public static void main(String[] args) {
I i = new I();
A b = new B();
// A a = new A();
b.accept(i);
}
}
class A {
void accept(I i) {
System.out.println("A");
i.visit(this);
}
}
class B extends A {
@Override
void accept(I i) {
System.out.println("B");
i.visit(this);
}
}
class I {
void visit(A a) {
System.out.println(" visit a");
}
void visit(B b) {
System.out.println(" visit b");
}
}