jahiahomepagelink.java

java 写的一个新闻发布系统

//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//                 . . . i n   j a h i a   w e   t r u s t . . .
//
//
// NK - 17 Dec. 2001 :
//

package org.jahia.services.homepages;


import java.util.Hashtable;
import java.util.Enumeration;

import org.jahia.exceptions.JahiaException;
import org.jahia.utils.JahiaConsole;


/**
 * A JahiaHomepageLink holds information used to define homepage of type Link.
 * Home page definition of this type holds a page id that refers to the page that
 * should be used as Home page.
 *
 * @author Khue ng
 * @see HomepageTypes.HOMEPAGE_LINK
 * @version 1.0
 */
public final class JahiaHomepageLink extends JahiaHomepage
{
	private static String CLASS_NAME = JahiaHomepageLink.class.getName();
	
	private static final String PAGEID = "pageid";

	private JahiaHomepagesPersistance hpp;


	/**
	 * Constructor, subclass must have exact constructor signature.
	 *
	 * @param Integer id, the unique identifier
	 * @param String name, the name
	 * @param String descr, the descr
	 * @param Integer type, the type
	 * @param String sitekey, the site key
	 * @param Hashtable props, the properties
	 * @param Integer aclID, the acl
	 */
	JahiaHomepageLink(	Integer id,
						String name,
						String descr,
						Integer type,
						String siteKey,
						Hashtable props,
						Integer aclID ){
	
		super(id,name,descr,type,siteKey,props,aclID);	
	}

    
    //-------------------------------------------------------------------------
    /**
     * Return the internal page id that refers to a Jahia Page.
     *
     * @return int the internal page id or -1 if not defined.
     */
    public int getPageID(){
    	Integer pageID = (Integer)props.get(PAGEID);
    	if ( pageID == null ){
    		return -1;
    	}
    	return pageID.intValue();
	}
	
    //-------------------------------------------------------------------------
    /**
     * Set the page ID
     *
     * @param int the id
     */
    public void setPageID(int id){
		props.put(PAGEID,new Integer(id));
    }

    //--------------------------------------------------------------------------
    /**
     * Save its state.
     *
     */
    void save()
    throws JahiaException {
    	
    	hpp.getInstance().save(this);
    	saveProperties();
    }

    //--------------------------------------------------------------------------
    /**
     * Delete.
     *
     */
    void delete()
    throws JahiaException {

    	hpp.getInstance().delete(getID());
    	deleteProperties();
    }	

    //-------------------------------------------------------------------------
    /**
     * Load extra properties from storage
     *
     */
    void loadProperties() throws JahiaException{
		
		if ( props == null )
			props = new Hashtable();
		
		String value = null;

		value = hpp.getInstance().getProperty(this,PAGEID);
		if ( value != null ){
			try {
				props.put(PAGEID,new Integer(value));
			} catch ( Throwable t ){
				t.printStackTrace();
			}	
		}
	}
	
    //-------------------------------------------------------------------------
    /**
     * Save extra properties in storage
     *
     */
    void saveProperties() throws JahiaException{
		
		deleteProperties();	
		
		String value = null;
		
		value = Integer.toString(getPageID());
		if ( value != null )
			hpp.getInstance().addProperty(this,PAGEID,value);

    }

    //-------------------------------------------------------------------------
    /**
     * Delete extra properties in storage
     *
     */
    void deleteProperties() throws JahiaException{
		
		hpp.getInstance().deleteProperties(this);	
    }


    //--------------------------------------------------------------------------
    /**
     * Return a string representation of the home page and it's internal state.
     *
     * @return A string representation of this home page.
     */
    public String toString (){
    	
    	StringBuffer buff= new StringBuffer("String rep. of a ");
    	buff.append(CLASS_NAME);
    	buff.append(" bean		:\n");
    	buff.append("		 id	:");
    	buff.append(getID());
    	// TODO . complete
    	return buff.toString();
    	
    }

    //--------------------------------------------------------------------------
    /**
     * Return a clone.
     *
     * @return Object the clone.
     */
    public Object clone (){
    	
    	Hashtable hash = null;
    	if ( getProperties() != null ){
    		hash = new Hashtable();
    		if ( props.get(PAGEID) != null )
    			hash.put(PAGEID,new Integer(getPageID()));
    	}
    	
    	JahiaHomepageLink clone = 
    			new JahiaHomepageLink(	new Integer(getID()),	
    									getName(),
    									getDescr(),
    									new Integer(getType()),
    									getSiteKey(),
    									hash,
    									new Integer(getAclID()) );
 		return clone;   									
    }


}