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The JSP tags for encapsulating ZK XUL components

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/* PageRequestContext.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Fri Aug 31 15:35:29     2007, Created by tomyeh
}}IS_NOTE

Copyright (C) 2007 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
	This program is distributed under GPL Version 2.0 in the hope that
	it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.jsp.zul.impl;

import java.io.Writer;
import java.io.IOException;

import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.el.ELException;

import org.zkoss.web.servlet.xel.RequestContext;
import org.zkoss.xel.VariableResolver;
import org.zkoss.xel.XelException;

/**
 * A request context that is based on the page context
 * (import javax.servlet.jsp.PageContext).
 *
 * @author tomyeh
 * @since 3.0.0
 */
public class PageRequestContext implements RequestContext {
	private final PageContext _pgctx;

	public PageRequestContext(PageContext pgctx) {
		if (pgctx == null)
			throw new IllegalArgumentException();
		_pgctx = pgctx;
	}

	public Writer getOut() throws IOException {
		return _pgctx.getOut();
	}
	public ServletRequest getRequest() {
		return _pgctx.getRequest();
	}
	public ServletResponse getResponse() {
		return _pgctx.getResponse();
	}
	public ServletContext getServletContext() {
		return _pgctx.getServletContext();
	}
	public VariableResolver getVariableResolver() {
		return new VariableResolver(){
			javax.servlet.jsp.el.VariableResolver vr = _pgctx.getVariableResolver();
			public Object resolveVariable(String arg0) throws XelException {
				try {
					return vr.resolveVariable(arg0);
				} catch (ELException e) {
					throw new XelException(e);
				}
			}
		};//end of class...
	}
}//end of class...