library.java

struts框架的jsf组件的核心实用例子集合

package com.corejsf;

import java.util.*;
import javax.faces.model.SelectItem;
import javax.faces.event.ValueChangeEvent;

public class Library {
   private Map bookMap = new HashMap();
   private Book initialBook = null;
   private List bookItems = null;
   private String book = null;
   private String selectedBook = null;

   public Library() {
      Book peterpan = new Book();
      Book aliceInWonderland = new Book();

      initialBook = peterpan;

      aliceInWonderland.setDirectory("books/aliceInWonderland");
      aliceInWonderland.setTitleKey("aliceInWonderland");
      aliceInWonderland.setImage("books/aliceInWonderland/cheshire.jpg");
      aliceInWonderland.setNumChapters(12);

      peterpan.setDirectory("books/peterpan");
      peterpan.setTitleKey("peterpan");
      peterpan.setImage("books/peterpan/peterpan.jpg");
      peterpan.setNumChapters(15);

      bookMap.put("aliceInWonderland", aliceInWonderland);
      bookMap.put("peterpan", peterpan);
   }
   public void setBook(String book) { this.book = book; }
   public String getBook() { return book; }

   public Map getBooks() {
      return bookMap;
   }
   public void bookSelected(ValueChangeEvent e) {
      selectedBook = (String) e.getNewValue();
   }
   public Book getSelectedBook() {
      return selectedBook != null ? (Book) bookMap.get(selectedBook) :
                                            initialBook;
   }
   public List getBookItems() {
      if(bookItems == null) {
          bookItems = new LinkedList();
          Iterator it = bookMap.values().iterator();
          while(it.hasNext()) {
             Book book = (Book)it.next();
             bookItems.add(new SelectItem(book.getTitleKey(),
                                          getBookTitle(book.getTitleKey())));
          }
      }
      return bookItems;
   }
   private String getBookTitle(String key) {
      return com.corejsf.util.Messages.
                       getString("com.corejsf.messages", key, null);
   }
}