package com.acme.tag;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import javax.naming.*;



/**
 * A Tag for reading environment entries
 * @author Magnus Rydin
 */

public class GetEnvEntryTag extends TagSupport
{

  private String name;
  private String type;

  public GetEnvEntryTag()
  {
    super();
  }

  /**
   * Method used by the JSP container to set the parameter Name.
   */

  public void setName(String name)
  {
    this.name=name;
  }

  /**
   * Method used by the JSP container to set the parameter Type.
   */
  public void setType(String type)
  {
    this.type=type;
  }

  /**
   * Method Called at end of Tag
   * @return either EVAL_PAGE or SKIP_PAGE
   */

  public int doEndTag() throws javax.servlet.jsp.JspTagException
  {
    try{
      InitialContext context=new InitialContext();
      //get the env-entry
      Object obj=(Object)context.lookup("java:comp/env/"+name);
      //add the env-entry to the page scope
      pageContext.setAttribute(name,obj,PageContext.PAGE_SCOPE);
    }catch(javax.naming.NamingException ne){
      throw new JspTagException(ne.getMessage());
    }
    return EVAL_PAGE;
  }
}