rss.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package biz.tbuy.bbs.bean;

import biz.tbuy.bbs.ZoneFactory;
import biz.tbuy.bbs.ZoneModel;
import java.util.List;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.UIOutput;
import javax.faces.component.UIParameter;
import javax.faces.component.UIPanel;
import javax.faces.component.html.HtmlPanelGrid;
import javax.faces.component.html.HtmlOutputLink;
import javax.faces.component.html.HtmlOutputText;
/**
 *
 * @author Administrator
 */

public class RSS extends BaseBean{
    /** RSS param名称标识 */
    public final static String RSS = "rss";
    /** 用于标识订阅所有专区,如果rss=all表示订阅所有文章 */
    public final static String ALL = "all";
    /** 所要获取的数量 */
    public final static int TOTAL = 30;
    /** 对文章主体内容的截取长度(字符数) */
    public final static int CONTENT_LENGTH = 300;
    
    private UIPanel _uiPanel;
    
    /** Creates a new instance of RSS */
    public RSS() {}
    
    public void setUiPanel(UIPanel uiPanel) {
        _uiPanel = uiPanel;
    }
    
    public UIPanel getUiPanel() {
        _uiPanel = (HtmlPanelGrid)
                getApplication().createComponent(HtmlPanelGrid.COMPONENT_TYPE);
        List<UIComponent> comList = _uiPanel.getChildren();
        comList.add(createLink("讨阅所有专区", ALL));
        List<ZoneModel> zones = ZoneFactory.getZones();
        if (zones != null && !zones.isEmpty()) {
            for (ZoneModel zone : zones) {
                comList.add(createLink(zone.getName(), String.valueOf(zone.getNum())));
            }
        }
        return _uiPanel;
    }
    
    private UIOutput createLink(String outputDes, String rssValue) {
        Application app = getApplication();
        HtmlOutputLink link = (HtmlOutputLink) 
                app.createComponent(HtmlOutputLink.COMPONENT_TYPE);
        HtmlOutputText out = (HtmlOutputText) 
                app.createComponent(HtmlOutputText.COMPONENT_TYPE);
        UIParameter param = (UIParameter) 
                app.createComponent(UIParameter.COMPONENT_TYPE);
        //MethodExpression me = app.getExpressionFactory()// el,表达表，返回类型，参数
        //        .createMethodExpression(getELContext(), "#{bbs_rss.rss}", null, new Class<?>[0]);
        //link.setActionExpression(me);
        link.setValue(getComApplication().getHttpContextPath() + "/bbs/rss.faces");
        out.setValue("[rss] " + outputDes);
        param.setName(RSS);
        param.setValue(rssValue);
        link.getChildren().add(out);
        link.getChildren().add(param);
        return link;
    }
}