reply.java

tapestry4.0应用,特别适用于初学者

package com.cucu.tapestry.page;

import com.cucu.tapestry.component.MyBasePage;
import com.cucu.tapestry.core.MyEngine;
import com.cucu.tapestry.core.MyVisit;
import com.cucu.tapestry.entity.Guestbook;
import com.cucu.tapestry.service.GuestbookService;
import org.apache.tapestry.IExternalPage;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.RedirectException;
import org.apache.tapestry.event.PageBeginRenderListener;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.valid.ValidationDelegate;

import javax.servlet.http.HttpServletRequest;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * 留言回复
 *
 * @author 绝情酷哥
 * @version 1.0
 */
public abstract class Reply
        extends MyBasePage
        implements PageBeginRenderListener, IExternalPage {


    public abstract HttpServletRequest getServletRequest();

    public abstract MyVisit getMyVisit();

    public abstract void setErrorMessage(String msg);

    public abstract String getTitle();

    public abstract void setTitle(String title);

    public abstract String getContent();

    public abstract void setContent(String content);

    public abstract GuestbookService getGuestbookService();

    public abstract Integer getParentId();

    public abstract void setParentId(Integer parentId);

    private Guestbook guestbook;


    /**
     * @return 返回下载文件列表
     */
    public List getDownloadFiles() {
        List list = null;
        String files = this.guestbook.getAttachUrl();
        if (files == null || files.trim().equals("")) {
            return null;
        }
        String file[] = files.split("@");
        if (file != null && file.length > 0) {
            list = new ArrayList();
            for (int i = 1; i < file.length; i++) {
                list.add(file[i]);
            }
        }
        return list;
    }

    /**
     * 响应删除贴子事件
     *
     * @param cycle
     */
    public void doDelete(IRequestCycle cycle) {
        Object[] parameters = cycle.getListenerParameters();
        Integer id = (Integer) parameters[0];
        String username = (String) parameters[1];
        MyVisit visit = this.getMyVisit();
        if (!username.equalsIgnoreCase(visit.getUsername())) {
            this.setErrorMessage("您不是本贴创建者，您不能删除此贴！");
            return;
        }

        this.getGuestbookService().doDeleteTopic(id);
        this.getPageUtil().setTotalCount((getGuestbookService().getReplyCount(this.getParentId())));

        throw new RedirectException(((MyEngine) this.getEngine()).getPageLinkUrl("Reply"));
    }

    /**
     * 回复列表
     *
     * @return 回复列表
     */
    public List getReplyList() {
        if (this.getPageUtil().getTotalCount() <= 0) {
            this.getPageUtil().setTotalCount(
                    (getGuestbookService().getReplyCount(this.getParentId())));
        }

        int pos = (this.getPageUtil().getCurrentPageNum() - 1) * this.getPageUtil().getPerPageNum();
        int size = this.getPageUtil().getPerPageNum();
        return this.getGuestbookService().getReplyList(this.getParentId(), pos, size);
    }

    /**
     * @return 根据ID返回单个留言
     */
    public Guestbook getGuestbook() {
        //System.out.println("getGuestbook");
        return this.guestbook;
    }

    /* （非 Javadoc）
      * @see org.apache.tapestry.event.PageRenderListener#pageBeginRender(org.apache.tapestry.event.PageEvent)
      */
    public void pageBeginRender(PageEvent event) {
        this.guestbook = this.getGuestbookService().getGuestbook(this.getParentId());
    }

    public void pageEndRender(PageEvent event) {
    }

    /**
     * 新增留言事件
     *
     * @param cycle
     */
    public String doNewReply(IRequestCycle cycle) {
        ValidationDelegate delegate = (ValidationDelegate) this.getBeans().getBean("delegate");
        if (delegate.getHasErrors()) {
            return this.getPageName();
        }

        String ip = this.getServletRequest().getRemoteAddr();
        MyVisit visit = this.getMyVisit();
        String username = visit.getUsername();
        String title = this.getTitle();
        String content = this.getContent();
        Guestbook gb = new Guestbook();
        gb.setUserName(username);
        gb.setIp(ip);
        gb.setContent(content);
        gb.setIsClose(new Integer(0));
        gb.setParentId(this.getParentId());
        gb.setIsTop(new Integer(0));
        gb.setBookDate(new Timestamp(new Date().getTime()));
        gb.setCreateTime(gb.getBookDate());
        gb.setTitle(title);

        this.getGuestbookService().doUpdateTopic(gb);

        this.setTitle(null);
        this.setContent(null);

        this.getPageUtil().setTotalCount((getGuestbookService().getReplyCount(this.getParentId())));

        throw new RedirectException(((MyEngine) this.getEngine()).getPageLinkUrl(this.getPageName()));


    }

    /**
     * （非 Javadoc）
     *
     * @see org.apache.tapestry.IExternalPage#activateExternalPage(Object[], org.apache.tapestry.IRequestCycle)
     */
    public void activateExternalPage(
            Object[] parameters,
            IRequestCycle cycle) {


    }

    /**
     * 完成(关闭)留言事件
     *
     * @param cycle
     */
    public void doClose(IRequestCycle cycle) {

        Object[] parameters = cycle.getListenerParameters();
        Integer bookId = (Integer) parameters[0];
        Guestbook gb = this.getGuestbookService().getGuestbook(bookId);
        gb.setIsClose(new Integer(1));
        this.getGuestbookService().doUpdateTopic(gb);
    }

    /**
     * 页面转至BookEdit
     *
     * @param cycle
     */
    public String gotoEdit(IRequestCycle cycle) {
        BookEdit edit = (BookEdit) cycle.getPage("BookEdit");
        Object[] obj = cycle.getListenerParameters();
        edit.setBookId((Integer) obj[0]);
        return "BookEdit";
    }
}