portletbeanset.java

java 写的一个新闻发布系统

package org.jahia.layout;

/**
 * Title:        Simple container for portlet beans
 * Description:
 * Copyright:    Copyright (c) 2002
 * Company:      Jahia Ltd
 * @author Serge Huber
 * @version 1.0
 */

import java.util.Vector;
import java.util.Enumeration;

import org.jahia.exceptions.JahiaException;

public class PortletBeanSet extends Vector {

    public PortletBeanSet() {
    }

    /**
     * Retrieves a portlet in the set by using it's identifier
     * @param portletID identifier of the portlet to retrieve
     * @returns a PortletBean object corresponding to the given identifier
     * @throws JahiaException if the object is not found in the portlet set.
     */
    public PortletBean findPortlet(int portletID)
    throws JahiaException {
        Enumeration portletList = this.elements();
        while (portletList.hasMoreElements()) {
            PortletBean curPortlet = (PortletBean) portletList.nextElement();
            if (curPortlet.getPortletID() == portletID) {
                return curPortlet;
            }
        }
        throw new JahiaException("PortletBeanSet.findPortlet",
                                 "Portlet not found",
                                 JahiaException.ERROR,
                                 JahiaException.DATA_ERROR);
    }

    /**
     * This function doesn't do much in this set object, but we have it here
     * to make the understanding of the PortletGrid and PortletSpanningGrid
     * implementations clearer. Also this provides just a little help in the
     * type checking, since we should only add PortletBean objects to this set
     * and nothing else.
     * @param portlet the portlet to be added to the set
     * @returns true (as per the general contract of Collection.add).
     */
    public boolean add(PortletBean portlet) {
        return super.add(portlet);
    }

}