ScreenTag.java

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package template;
import javax.servlet.jsp.tagext.SimpleTagSupport;
import javax.servlet.jsp.PageContext;
import java.util.*;

public class ScreenTag extends SimpleTagSupport {
   private String screenId;
   private ArrayList parameters = null;

   public ArrayList getParameters() {
   		return parameters;
   }
   public void setScreenId(String screenId) {
      this.screenId = screenId;
   }

   public ScreenTag() {
      super();
   }
   public void doTag() {
    parameters = new ArrayList();
    HashMap screens = (HashMap)((DefinitionTag)getParent()).getScreens();
    if (screens != null) {
      try {	
        if (!screens.containsKey(screenId))
          screens.put(screenId, parameters);
        getJspBody().invoke(null);
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    }
    else
    	Debug.println("ScreenTag: Unable to get screens object.");
  }
}