foreachjobtag.java~

21天精通Java,这是一本英文书

package web;

import java.rmi.*;
import javax.ejb.*;
import javax.naming.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import agency.*;

public class ForEachJobTag extends BodyTagSupport {
	private Advertise customer;
	AdvertiseJobHome advertiseJobHome;
	private String[] jobs;
	private int nextJob;

	public Advertise getCustomer() {
		return customer;
	}

	public void setCustomer(Advertise customer) {
		this.customer = customer;
	}

	public int doStartTag() throws JspException {
		try {
		   InitialContext ic = new InitialContext();
		   advertiseJobHome = (AdvertiseJobHome)ic.lookup("java:comp/env/ejb/AdvertiseJob");
		   jobs = customer.getJobs();
		   int nextJob = 0;
		   return getNextJob();
		}
		catch (Exception ex) {
			throw new JspTagException("ForEachJobTag: "+ex);
		}
	 }

	public int doAfterBody() throws JspException {
		try {
			JspWriter out = getPreviousOut();
			out.print(bodyContent.getString());
			bodyContent.clearBody();
			return getNextJob();
		}
		catch (Exception ex) {
			throw new JspTagException("ForEachJobTag: "+ex);
		}
	}

	private int getNextJob() throws RemoteException, CreateException
	{
	   if (nextJob >= jobs.length)
		   return SKIP_BODY;
	   AdvertiseJob advertiseJob = advertiseJobHome.create(jobs[nextJob++],customer.getLogin());
	   pageContext.setAttribute("job", advertiseJob, PageContext.REQUEST_SCOPE);
	   return EVAL_BODY_AGAIN;
	}
}