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JavaEE 1.6 API for Resin Java Application Server
/*
* Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package javax.servlet.jsp.el;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.el.PropertyNotWritableException;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspContext;
import javax.servlet.jsp.PageContext;
import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Variable resolution for JSP variables
*/
public class ImplicitObjectELResolver extends ELResolver {
private static final HashMap _propMap
= new HashMap();
private static final ArrayList _featureDescriptors
= new ArrayList();
@Override
public Class getCommonPropertyType(ELContext context,
Object base)
{
if (base == null)
return String.class;
else
return null;
}
@Override
public Iterator
getFeatureDescriptors(ELContext context, Object base)
{
if (base != null)
return null;
return _featureDescriptors.iterator();
}
@Override
public Class getType(ELContext context,
Object base,
Object property)
{
if (base != null)
return null;
Prop prop = _propMap.get(property);
if (prop == null)
return null;
context.setPropertyResolved(true);
return null;
}
@Override
public Object getValue(ELContext context,
Object base,
Object property)
{
if (base != null)
return null;
Prop prop = _propMap.get(property);
if (prop == null)
return null;
context.setPropertyResolved(true);
PageContext jspContext = (PageContext) context.getContext(JspContext.class);
switch (prop) {
case PAGE_CONTEXT:
return jspContext;
case PAGE_SCOPE:
{
HashMap map = new HashMap();
Enumeration e = jspContext.getAttributeNamesInScope(PageContext.PAGE_SCOPE);
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, jspContext.getAttribute(name));
}
return map;
}
case REQUEST_SCOPE:
{
HashMap map = new HashMap();
ServletRequest request = jspContext.getRequest();
Enumeration e = request.getAttributeNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, request.getAttribute(name));
}
return map;
}
case SESSION_SCOPE:
{
HashMap map = new HashMap();
HttpSession session = jspContext.getSession();
if (session == null)
return null;
Enumeration e = session.getAttributeNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, session.getAttribute(name));
}
return map;
}
case APPLICATION_SCOPE:
{
HashMap map = new HashMap();
ServletContext app = jspContext.getServletContext();
Enumeration e = app.getAttributeNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, app.getAttribute(name));
}
return map;
}
case PARAM:
{
HashMap map = new HashMap();
ServletRequest request = jspContext.getRequest();
Enumeration e = request.getParameterNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, request.getParameter(name));
}
return map;
}
case PARAM_VALUES:
{
HashMap map = new HashMap();
ServletRequest request = jspContext.getRequest();
Enumeration e = request.getParameterNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, request.getParameterValues(name));
}
return map;
}
case HEADER:
{
HashMap map = new HashMap();
HttpServletRequest request = (HttpServletRequest) jspContext.getRequest();
Enumeration e = request.getHeaderNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, request.getHeader(name));
}
return map;
}
case HEADER_VALUES:
{
HashMap map = new HashMap();
HttpServletRequest request = (HttpServletRequest) jspContext.getRequest();
Enumeration e = request.getHeaderNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, request.getHeaders(name));
}
return map;
}
case COOKIE:
{
HashMap map = new HashMap();
HttpServletRequest request
= (HttpServletRequest) jspContext.getRequest();
Cookie []cookies = request.getCookies();
if (cookies == null)
return map;
for (int i = cookies.length - 1; i >= 0; i--) {
map.put(cookies[i].getName(), cookies[i].getValue());
}
return map;
}
case INIT_PARAM:
{
HashMap map = new HashMap();
ServletContext app = jspContext.getServletContext();
Enumeration e = app.getInitParameterNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
map.put(name, app.getInitParameter(name));
}
return map;
}
}
return null;
}
@Override
public boolean isReadOnly(ELContext context,
Object base,
Object property)
{
if (base != null)
return true;
Prop prop = _propMap.get(property);
if (prop == null)
return true;
context.setPropertyResolved(true);
return true;
}
@Override
public void setValue(ELContext context,
Object base,
Object property,
Object value)
{
if (base != null)
return;
Prop prop = _propMap.get(property);
if (prop == null)
return;
context.setPropertyResolved(true);
throw new PropertyNotWritableException(String.valueOf(value));
}
private enum Prop {
PAGE_CONTEXT,
PAGE_SCOPE,
REQUEST_SCOPE,
SESSION_SCOPE,
APPLICATION_SCOPE,
PARAM,
PARAM_VALUES,
HEADER,
HEADER_VALUES,
COOKIE,
INIT_PARAM
};
static {
_propMap.put("pageContext", Prop.PAGE_CONTEXT);
_propMap.put("pageScope", Prop.PAGE_SCOPE);
_propMap.put("requestScope", Prop.REQUEST_SCOPE);
_propMap.put("sessionScope", Prop.SESSION_SCOPE);
_propMap.put("applicationScope", Prop.APPLICATION_SCOPE);
_propMap.put("param", Prop.PARAM);
_propMap.put("paramValues", Prop.PARAM_VALUES);
_propMap.put("header", Prop.HEADER);
_propMap.put("headerValues", Prop.HEADER_VALUES);
_propMap.put("cookie", Prop.COOKIE);
_propMap.put("initParam", Prop.INIT_PARAM);
for (Object key : _propMap.keySet()) {
String name = String.valueOf(key);
FeatureDescriptor desc = new FeatureDescriptor();
desc.setName(name);
desc.setDisplayName(name);
desc.setShortDescription("");
desc.setExpert(false);
desc.setHidden(false);
desc.setPreferred(true);
desc.setValue(ELResolver.TYPE, Map.class);
desc.setValue(ELResolver.RESOLVABLE_AT_DESIGN_TIME, Boolean.TRUE);
_featureDescriptors.add(desc);
}
}
}
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