/**
 * A tag handler for a custom tag.
 * This tag handler can generate content from a bean with the type
 * 	cs4208.beans.TestBean
 * The tag handle expects that a bean of this type is available on
 * the request scope. However, the key with which the bean is stored
 * on the request scope is not hard-coded.
 * In the JSP that uses this custom tag, the key for the bean should
 * be set on this tag handler.
 * Do note that this tag handler is in a package. The tag handler you
 * define should also be in a package.
 * Of course, to get this to work, place the compiled class file for this
 * Java file in classes/cs4208/tags
 *
 * @author Nauman Chaudhry
 */


package cs4208.tags;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
import cs4208.beans.TestBean;

public class TestBeanTag extends SimpleTagSupport {
	public void doTag(){
	   try{
		PageContext pContext = (PageContext) getJspContext();
		TestBean tBean = (TestBean) pContext.getRequest().getAttribute(m_beanName);
		JspWriter out = pContext.getOut();
		if(tBean != null)
		   out.println(tBean.getTestContent());
		else
	         out.println("Bean " + m_beanName + " is null in TestBeanTag?");
	   }catch(IOException ioe) {
		   try{
			PageContext pContext = (PageContext) getJspContext();
		      pContext.getOut().println("Error with the bean");
               } catch(Exception e){}
         }
      }

	// Bean name. The JSP page is expected to set this.
	public void setBeanName(String beanName)
	{
		m_beanName = beanName;
	}
	private String m_beanName;
}