commcontext.java

OO 图书馆系统

  import java.net.*;
  import org.apache.axis.message.SOAPEnvelope;
  import org.w3c.dom.*;

 // interface of Strategy
  interface IStrategy
  {
    public void execute();
  }

  // Implements the strategy interface
  class ConcreteStrategySOAP implements IStrategy
  {
  	 
    private SOAPEnvelope requestenv;
  	private Document doc;
    private URL url;
    private int no;
    private int no_display;
    
    //constructor 
    public ConcreteStrategySOAP(URL url,SOAPEnvelope env,int no,int no_display){
  	
  	  this.url=url;
  	  this.requestenv=env;
  	  this.no=no;
  	  this.no_display=no_display;
  	  
  	
  	
    }
  	
    public void execute()
    {
       CommSoapRequestProxy csrp = new CommSoapRequestProxy(url,requestenv);
       this.doc = csrp.setComm();
       
       //using flickr.photos.search method
       if(no==1){
       	ParsingServiceFacade x= new ParsingServiceFacade(doc);
       	x.parsingNodePS(no_display);
       }
       //using flickr.tags.getrelated method
       if(no==2){
       	ParsingServiceFacade x= new ParsingServiceFacade(doc);
       	x.parsingNodeTR(no_display);
       }
    }
  }

  class ConcreteStrategyREST implements IStrategy
  {
   
  	private Document doc;
    private URL url;
    private int no;
  	private int no_display;
    
    //constructor 
    public ConcreteStrategyREST(URL url,int no,int no_display){
  	
  	this.url=url;
  	this.no=no;
  	this.no_display=no_display;
  	 	
    }
    
    public void execute()
    {
    	
    	CommRestRequestProxy crrp = new CommRestRequestProxy(url);
       this.doc = crrp.setComm();
       
       if(no==1){
       	ParsingServiceFacade x= new ParsingServiceFacade(doc);
       	x.parsingNodePS(no_display);
       }
       if(no==2){
       	ParsingServiceFacade x= new ParsingServiceFacade(doc);
       	x.parsingNodeTR(no_display);
       }
      
    }
  }


  class CommContext
  {
    private IStrategy strategy;
  

    // Constructor
    public CommContext(IStrategy strategy)
    {
      this.strategy = strategy;
    }

    public void execute()
    {
      strategy.execute();
      
    }
  }