traditionpagination.java

羽量级数据持久层开发框架

package org.speedframework.tag;

//~--- non-JDK imports --------------------------------------------------------

import org.speedframework.entity.Pagination;

//~--- JDK imports ------------------------------------------------------------

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;

/**
 *  类描述信息，描述类的主要职责和用处。
 *
 *
 * @version    $LastChangedRevision: 1945 $, 2007.09.29 at 02:14:14 CST
 * @author     <a href="mailto:[e-mail]">piginzoo </a>
 */
public class TraditionPagination extends AbsSpeedStyle implements IPaginationTag
 {

    /**
     *
     */
    private static final long serialVersionUID = 7628624849965836710L;

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @return
     *
     * @throws JspException
     */
    public int doStartTag() throws JspException {
        JspWriter out = pageContext.getOut();

        try {
            if (this.getName() == null) {
                this.setName("pagination");
            }

            if (this.getParameter() == null) {
                this.setParameter("page");
            }

            if (this.getPath() == null) {
                throw new NullPointerException("path is null");
            }

            this.setPagination((Pagination) pageContext.getRequest().getAttribute(this.getName()));

            if (this.getPagination() == null) {
                throw new NullPointerException(this.getName() + "is null in request");
            }

            // this.setFirstTitle("[????]");
            // this.setPreviousTitle("[???]");
            // this.setNextTitle("[????]");
            // this.setLastTitle("[?????]");
            // this.setTotalTitle("[????]");
            if (this.getPagination().isHasPreviousPage()) {
                out.println(super.isHasPrevious());
            } else {
                out.println(super.notHasPrevious());
            }

            if (this.getPagination().isHasNextPage()) {
                out.println(super.isHasNext());
            } else {
                out.println(super.notHasNext());
            }

            out.println(super.showTotal());
            out.println(super.showPage());
        } catch (IOException e) {
            throw new JspException(e);
        }

        return SKIP_BODY;
    }

    /**
     * 方法描述信息，
     * 描述方法是做什么的，
     * 如何调用，最好给出调用代码示例。
     *
     * @return
     *
     * @throws JspException
     */
    public int doEndTag() throws JspException {
        return EVAL_PAGE;
    }
}