booksearcher.java

JAX-RPC 构建 RPC 服务和客户机,使用 Java API 构建基于 RPC 的 Web 服务

import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class BookSearcher {

  private Map books;

  public BookSearcher() {
    books = new HashMap();

    // for example purposes
    addBooks();
  }

  public void setBooks(Map books) {  
    this.books = books;
  }

  public void addBook(String title, List keywords) {
    books.put(title, keywords);
  }

  public void addKeyword(String title, String keyword) {
    List keywords = (List)books.get(title);
    if (keywords != null) {
      keywords.add(keyword);
      // No need to manually "re-put" the list
    } else {
      keywords = new LinkedList();
      keywords.add(keyword);
      books.put(title, keywords);
    }
  }

  public List getKeywords(String title) {
    return (List)books.get(title);
  }

  public List search(String keyword) {
    List results = new LinkedList();

    for (Iterator i = books.keySet().iterator(); i.hasNext(); ) {
      String title = (String)i.next();
      List keywords = (List)books.get(title);
      if (keywords.contains(keyword)) {
        results.add(title);
      }
    }

    return results;
  }

  private void addBooks() {
    List keywords = new LinkedList();
    keywords.add("presentation"); keywords.add("Keynote");
    keywords.add("PowerPoint"); keywords.add("design");
    addBook("Presentation Zen", keywords);

    List keywords2 = new LinkedList();
    keywords2.add("presentation"); keywords2.add("user interface design");
    keywords2.add("pictures"); keywords2.add("visuals");
    addBook("The Back of the Napkin", keywords2);

    List keywords3 = new LinkedList();
    keywords3.add("marketing"); keywords3.add("business");
    keywords3.add("commercials"); keywords3.add("consumers");
    addBook("Purple Cow", keywords3);

    List keywords4 = new LinkedList();
    keywords4.add("marketing"); keywords4.add("business");
    keywords4.add("notecards"); keywords4.add("design");
    keywords4.add("visuals"); keywords4.add("pictures");
    keywords4.add("humor");
    addBook("Indexed", keywords4);

    List keywords5 = new LinkedList();
    keywords5.add("marketing"); keywords5.add("business");
    keywords5.add("design"); keywords5.add("emotion");
    keywords5.add("functionality"); keywords5.add("consumers");
    addBook("Emotional Design", keywords5);
    keywords.clear();
  }
}