CommandEnum.java

package com.cheng.zenofdesignpatterns.perfectworld.command_chain;

import java.util.ArrayList;
import java.util.List;

/**
 * 所有的命令在这里定义
 */
public enum CommandEnum {

    ls("com.cheng.zenofdesignpatterns.perfectworld.command_chain.command.LSCommand"),
    df("com.cheng.zenofdesignpatterns.perfectworld.command_chain.command.DFCommand");

    private String value = "";

    // 定义构造函数，目的是Data(value)类型的相匹配
    private CommandEnum(String value) {
        this.value = value;
    }

    public String getValue() {
        return this.value;
    }

    // 返回所有的enum对象
    public static List<String> getNames() {
        CommandEnum[] commandEnum = CommandEnum.values();
        List<String> names = new ArrayList<String>();
        for (CommandEnum c : commandEnum) {
            names.add(c.name());
        }
        return names;
    }

}