jahiacategories.java

java 写的一个新闻发布系统

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//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
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//                 . . . i n   j a h i a   w e   t r u s t . . .
//


package org.jahia.data.categories;

import java.util.*;                     // Hashtable

/***
    * Title :       JahiaCategories
    * desc : This class returns the categories proposed to the user when
    *               he creates an undefined field.
    *               In the (near) future, this class should be able to add
    *               (and remove ?) dynamically categories : that's why
    *               categories are not static.
    *               Another possibility would be that the categories are
    *               returned by a market place server via a SOAP call, but
    *               this should be done only after appropriate research
    *               (for example : what happens in a closed Intranet ?, etc.)
    * Copyright :   Copyright Jahia (c) 2001
    * Company :     Jahia Ltd
    * @author       Eric Vassalli
    * @version      1.0
    */


public class JahiaCategories {

    private static  JahiaCategories     theObject;

    /**
     * @associates CategoryBean 
     */
    private         Vector              theCategories;

    /***
        *  constructor is protected, because class is a singleton
        *
        */
    protected JahiaCategories() {
        createInitialCategories();
    } // end constructor


    /***
        * returns a unique instance of the class
        * @return       unique instance of the class
        *
        */
    public static synchronized JahiaCategories getInstance()
    {
        if (theObject == null) {
            theObject = new JahiaCategories();
        }
        return theObject;
    } // end getInstance


    /***
        * creates the initial categories
        * TODO : the categories must be read from a text file !
        *
        */
    private void createInitialCategories()
    {
        theCategories = new Vector();
        CategoryBean aCat;
        // Basics
        aCat = new CategoryBean( 1, "Basics",
            "Texts, Files, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Web
        aCat = new CategoryBean( 2, "Web",
            "Menus, Counters, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Collaborative
        aCat = new CategoryBean( 3, "Collaborative",
            "Forums, Chats, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Personal
        aCat = new CategoryBean( 4, "Basics",
            "Address Books, Calendars, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Business/Finance
        aCat = new CategoryBean( 5, "Business/Finance",
            "Enterprise tools, Stock Watchers, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Home/Education
        aCat = new CategoryBean( 6, "Home/Education",
            "All-purposes Lists, Virtual Classrooms, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Content sources
        aCat = new CategoryBean( 7, "Content Sources",
            "Weather Forecasts, Stock market, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // E-Services
        aCat = new CategoryBean( 8, "E-Services",
            "Shared Calendars, Order Systems, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Fun Stuff
        aCat = new CategoryBean( 9, "Fun Stuff",
            "Games, Multimedia, ..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
        // Other
        aCat = new CategoryBean( 10, "Other",
            "..." );
        if (aCat != null) {
            theCategories.add( aCat );
        }
    } // end createInitialCategories


    /***
        * returns the categories
        * @return       a Vector containing all Jahia Categories
        *
        */
    public Vector getList()
    {
        if (theCategories != null) {
            return (Vector) theCategories.clone();
        } else {
            return new Vector();
        }
    } // end getList


} // end JahiaCategories