interpreterstructural.cs

来自「使用C#程序将23个常用设计模式进行列表显示」· CS 代码 · 共 65 行

using System;
using System.Windows.Forms;
using System.Collections;

namespace DesignPattern.InterpreterStructural
{
    class InterpreterStructural : AbstractPattern
    {
        public static void Run(TextBox tbInfo)
        {
            s_tbInfo = tbInfo;
            s_tbInfo.Text = "";

            Context context = new Context(); 
            
            // Usually a tree 
            ArrayList list = new ArrayList(); 
            
            // Populate 'abstract syntax tree' 
            list.Add(new TerminalExpression()); 
            list.Add(new NonterminalExpression()); 
            list.Add(new TerminalExpression()); 
            list.Add(new TerminalExpression());
            
            // Interpret 
            foreach (AbstractExpression exp in list) 
            {
                exp.Interpret(context); 
            }

            // Wait for user 
            //Console.Read();
        }
    }

    // "Context" 
    class Context 
    {
    }
    
    // "AbstractExpression" 
    abstract class AbstractExpression 
    {
        public abstract void Interpret(Context context);
    }
    
    // "TerminalExpression" 
    class TerminalExpression : AbstractExpression 
    {
        public override void Interpret(Context context) 
        {
            DesignPattern.FormMain.OutputInfo("Called Terminal.Interpret()"); 
        }
    }
    
    // "NonterminalExpression" 
    class NonterminalExpression : AbstractExpression 
    {
        public override void Interpret(Context context)
        {
            DesignPattern.FormMain.OutputInfo("Called Nonterminal.Interpret()"); 
        }
    }
}