parsingfacade.java

OO 图书馆系统

  
import java.net.URL;
import java.util.ArrayList;
import org.w3c.dom.*;

  //Facade to provide general parsing services for flickr.photos.search and flickr.tags.getrelated
  class ParsingFacade
  {
    Init subone;
    ParsingNodePS subtwo;
    ParsingNodeTR subthree;

    public ParsingFacade(Document doc,String photo)
    {
      subone= new Init(doc,photo);
     
      subtwo = new ParsingNodePS();
      subthree = new ParsingNodeTR();
      
    }
  

    public void parsingPS(int no_display)
    {
    	
      Element eboy=subone.getElement();
      ArrayList photos=subone.iniArray();
      subtwo.displayNode(eboy,photos,no_display);
      // Only display the first no_display photos returned
	  // Photos are returned ordered by upload date and time
	  // Is consistent with visiting flickr.com through a browser and 
	  // searching the tag and disly restult according to "most recent" order
	  // Throw exception when there is less than no_display photos returned

        System.out.println("Photos:");
        for (int i =0; i < no_display; i ++){
        
        subone.photosPS.get(i).printPhotoInfo();
        }
    	
     
    }
    
    
    public void parsingTR(int no_display)
    {
        
      Element eboy=subone.getElement();
      ArrayList photos=subone.iniArray();
      subthree.displayNode(eboy,photos,no_display);
       // Only display the first no_display photos returned
	    // Photos are returned ordered by upload date and time
	    // Is consistent with visiting flickr.com through a browser and 
	    // searching the tag and disly restult according to "most recent" order
	    // Throw exception when there is less than no_display photos returned

        System.out.println("Tags:");
        for (int i =0; i < no_display; i ++)
        subone.photosTR.get(i).printPhotoInfo();
    }

   
  }
  
  
  //subsystem class initialize parsing
  //this class is used for initialization before parsing
  class Init{
  	
  	private Document doc;
  	private String photo;
  	public ArrayList <PhotoPS> photosPS=new ArrayList<PhotoPS>();
  	public ArrayList <PhotoTR> photosTR=new ArrayList<PhotoTR>();
  	
  	//constructor
  	public Init(Document doc,String photo){
  	  this.doc=doc;
  	  this.photo=photo;
  	  
  	}
  	
  	public Element getElement(){
  		
  		Element eboy=doc.getDocumentElement();
  		
  		return eboy;
      
  	}
  	
  	public ArrayList iniArray(){
  		
  		if(photo=="PhotoPS"){
  		
  		
  		return this.photosPS;
  		}
  		else{
  			
  		return	this.photosTR;
  			
  		}
  		
  	}
  	
  	
  	
  	
  	
  	
  }
  
   //subsystem class  ParsingNodePS
  //this class is used for parsing Nodes when using flickr.photos.search
  class ParsingNodePS{
   	
  	//constructor
  	public ParsingNodePS(){
  	  
  	}
  	
  
  	
  	public void displayNode(Node node, ArrayList photos,int no_display){
  		
  	  if(node.getNodeName().equals("photo")){

      // extract certain attributes ("owner", "id" and "title") from the returned xml message
	  // check flickr.photos.search's sample response format

      NamedNodeMap nd = node.getAttributes();
	  photos.add(new PhotoPS(nd.getNamedItem("id").getNodeValue(),
								 nd.getNamedItem("owner").getNodeValue(),
								  nd.getNamedItem("secret").getNodeValue(),
								  nd.getNamedItem("server").getNodeValue(),
								  nd.getNamedItem("farm").getNodeValue(),
								  nd.getNamedItem("title").getNodeValue(),
								  nd.getNamedItem("ispublic").getNodeValue(),
								  nd.getNamedItem("isfriend").getNodeValue(),
								  nd.getNamedItem("isfamily").getNodeValue()));
        }
  
      NodeList children=node.getChildNodes();
        if (children != null) { 
            for (int i=0; i<children.getLength(); i++) {   
                displayNode(children.item(i),photos,no_display);
            }
        }
        
       
       
  	}
  	
  	
  	
  	
  }
     //subsystem class  ParsingNodeTR
  //this class is used for parsing Nodes when using flickr.tags.related
  class ParsingNodeTR{
  	
   	
  	//constructor
  	public ParsingNodeTR(){
  	
  	  
  	}
  	
  
  	
  	public void displayNode(Node node, ArrayList photos,int no_display){
  		
  	  if(node.getNodeName().equals("tag")){

    
	 	photos.add(new PhotoTR(node.getTextContent()));
        }
  
      NodeList children=node.getChildNodes();
        if (children != null) { 
            for (int i=0; i<children.getLength(); i++) {   
                displayNode(children.item(i),photos,no_display);
            }
        }
        
       
  	}
  	
  	
  	
  	
  }
  
  //class PhotoPS
  //this class is used to create photo object when using flickr.photos.search method
  class PhotoPS{
	String owner;	
	String id;
	String title;
	String secret;
	String server;
	String ispublic;
	String isfriend;
	String isfamily;
	String farm;

	public PhotoPS(String id, String owner, String secret,String server,String farm,String title,String ispublic,String isfriend,String isfamily){
		this.owner = owner;
		this.id = id;
		this.title = title;
		this.secret = secret;
		this.server = server;
		this.ispublic = ispublic;
		this.isfriend = isfriend;
		this.isfamily = isfamily;
		this.farm=farm;
		
	}

	public void printPhotoInfo(){
		System.out.println(" Id: " + id + " Owner: " + owner + " Secret: " + secret + " Server: " + server + " Farm: " + farm + " Title: " + title + " Ispublic: " + ispublic + " Isfriend: " + isfriend + " Isfamily: " + isfamily);
	}
  }
  
  //class PhotoSR
  //this class is used to create photo object when using flickr.tags.getrelated method
  class PhotoTR{
	String nodev;	
	public PhotoTR(String nodev){
		this.nodev =nodev;
	
		
	}

	public void printPhotoInfo(){
		System.out.println(" TagValue: " + nodev );
	}
  }