public JspContextWrapper(JspContext jspContext,
    ArrayList nestedVars,
    ArrayList atBeginVars,
    ArrayList atEndVars,
    Map aliases) 
{
		this.invokingJspCtxt = (PageContext) jspContext;
		this.nestedVars = nestedVars;
		this.atBeginVars = atBeginVars;
		this.atEndVars = atEndVars;
		this.pageAttributes = new HashMap< String, Object >(16);
		this.aliases = aliases;
		if (nestedVars != null) {
			this.originalNestedVars = new HashMap< String, Object >(nestedVars.size());
		}
		syncBeginTagFile();
}

 public Object findAttribute(String name) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		Object o = pageAttributes.get(name);
		if (o == null) {
			o = invokingJspCtxt.getAttribute(name, REQUEST_SCOPE);
			if (o == null) {
				if (getSession() != null) {
					o = invokingJspCtxt.getAttribute(name, SESSION_SCOPE);
				}
				if (o == null) {
					o = invokingJspCtxt.getAttribute(name, APPLICATION_SCOPE);
				}
			}
		}
		return o;
}

 public  void forward(String relativeUrlPath) throws IOException, ServletException 
{
		invokingJspCtxt.forward(relativeUrlPath);
}

 public Object getAttribute(String name) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		return pageAttributes.get(name);
}

 public Object getAttribute(String name,
    int scope) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		if (scope == PAGE_SCOPE) {
			return pageAttributes.get(name);
		}
		return invokingJspCtxt.getAttribute(name, scope);
}

 public Enumeration getAttributeNamesInScope(int scope) 
{
		if (scope == PAGE_SCOPE) {
			return new Enumerator(pageAttributes.keySet().iterator());
		}
		return invokingJspCtxt.getAttributeNamesInScope(scope);
}

 public int getAttributesScope(String name) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		if (pageAttributes.get(name) != null) {
			return PAGE_SCOPE;
		} else {
			return invokingJspCtxt.getAttributesScope(name);
		}
}

 public ELContext getELContext() 
{
        // instead decorate!!!
        return this.invokingJspCtxt.getELContext();
        /*
		if (this.elContext != null) {
			JspFactory jspFact = JspFactory.getDefaultFactory();
			ServletContext servletContext = this.getServletContext();
			JspApplicationContextImpl jspCtx = (JspApplicationContextImpl) jspFact
					.getJspApplicationContext(servletContext);
			this.elContext = jspCtx.createELContext(this);
		}
		return this.elContext;
        */
}

 public Exception getException() 
{
		return invokingJspCtxt.getException();
}

 public ExpressionEvaluator getExpressionEvaluator() 
{
		return invokingJspCtxt.getExpressionEvaluator();
}

 public JspWriter getOut() 
{
		return invokingJspCtxt.getOut();
}

 public Object getPage() 
{
		return invokingJspCtxt.getPage();
}

 public ServletRequest getRequest() 
{
		return invokingJspCtxt.getRequest();
}

 public ServletResponse getResponse() 
{
		return invokingJspCtxt.getResponse();
}

 public ServletConfig getServletConfig() 
{
		return invokingJspCtxt.getServletConfig();
}

 public ServletContext getServletContext() 
{
		return invokingJspCtxt.getServletContext();
}

 public HttpSession getSession() 
{
		return invokingJspCtxt.getSession();
}

 public VariableResolver getVariableResolver() 
{
		return this;
}

 public  void handlePageException(Exception ex) throws IOException, ServletException 
{
		// Should never be called since handleException() called with a
		// Throwable in the generated servlet.
		handlePageException((Throwable) ex);
}

 public  void handlePageException(Throwable t) throws IOException, ServletException 
{
		invokingJspCtxt.handlePageException(t);
}

 public  void include(String relativeUrlPath) throws IOException, ServletException 
{
		invokingJspCtxt.include(relativeUrlPath);
}

 public  void include(String relativeUrlPath,
    boolean flush) throws IOException, ServletException 
{
		include(relativeUrlPath, false); // XXX
}

 public  void initialize(Servlet servlet,
    ServletRequest request,
    ServletResponse response,
    String errorPageURL,
    boolean needsSession,
    int bufferSize,
    boolean autoFlush) throws IllegalArgumentException, IOException, IllegalStateException 
{

}

 public JspWriter popBody() 
{
		return invokingJspCtxt.popBody();
}

 public BodyContent pushBody() 
{
		return invokingJspCtxt.pushBody();
}

 public JspWriter pushBody(Writer writer) 
{
		return invokingJspCtxt.pushBody(writer);
}

 public  void release() 
{
		invokingJspCtxt.release();
}

 public  void removeAttribute(String name) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		pageAttributes.remove(name);
		invokingJspCtxt.removeAttribute(name, REQUEST_SCOPE);
		if (getSession() != null) {
			invokingJspCtxt.removeAttribute(name, SESSION_SCOPE);
		}
		invokingJspCtxt.removeAttribute(name, APPLICATION_SCOPE);
}

 public  void removeAttribute(String name,
    int scope) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		if (scope == PAGE_SCOPE) {
			pageAttributes.remove(name);
		} else {
			invokingJspCtxt.removeAttribute(name, scope);
		}
}

 public Object resolveVariable(String pName) throws ELException 
{
		ELContext ctx = this.getELContext();
		return ctx.getELResolver().getValue(ctx, null, pName);
}

VariableResolver interface

 public  void setAttribute(String name,
    Object value) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		if (value != null) {
			pageAttributes.put(name, value);
		} else {
			removeAttribute(name, PAGE_SCOPE);
		}
}

 public  void setAttribute(String name,
    Object value,
    int scope) 
{
		if (name == null) {
			throw new NullPointerException(Localizer
					.getMessage("jsp.error.attribute.null_name"));
		}
		if (scope == PAGE_SCOPE) {
			if (value != null) {
				pageAttributes.put(name, value);
			} else {
				removeAttribute(name, PAGE_SCOPE);
			}
		} else {
			invokingJspCtxt.setAttribute(name, value, scope);
		}
}

 public  void syncBeforeInvoke() 
{
		copyTagToPageScope(VariableInfo.NESTED);
		copyTagToPageScope(VariableInfo.AT_BEGIN);
}

Synchronize variables before fragment invokation

 public  void syncBeginTagFile() 
{
		saveNestedVariables();
}

Synchronize variables at begin of tag file

 public  void syncEndTagFile() 
{
		copyTagToPageScope(VariableInfo.AT_BEGIN);
		copyTagToPageScope(VariableInfo.AT_END);
		restoreNestedVariables();
}

Synchronize variables at end of tag file