/*
* Copyright (c) 1998-2011 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.servlet.jsp.JspContext;
import javax.servlet.jsp.PageContext;
import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
/**
* Variable resolution for JSP variables
*/
public class ScopedAttributeELResolver extends ELResolver {
@Override
public Class<String> getCommonPropertyType(ELContext context,
Object base)
{
if (base == null)
return String.class;
else
return null;
}
@Override
public Iterator<FeatureDescriptor>
getFeatureDescriptors(ELContext context, Object base)
{
if (base != null)
return null;
PageContext pageContext
= (PageContext) context.getContext(JspContext.class);
context.setPropertyResolved(true);
ArrayList<FeatureDescriptor> keys = new ArrayList<FeatureDescriptor>();
Enumeration e = pageContext.getAttributeNamesInScope(PageContext.PAGE_SCOPE);
while (e.hasMoreElements()) {
Object key = e.nextElement();
String name = (String) key;
FeatureDescriptor desc = new FeatureDescriptor();
desc.setName(name);
desc.setDisplayName(name);
desc.setShortDescription("");
desc.setExpert(false);
desc.setHidden(false);
desc.setPreferred(true);
if (key == null)
desc.setValue(ELResolver.TYPE, null);
else
desc.setValue(ELResolver.TYPE, key.getClass());
desc.setValue(ELResolver.RESOLVABLE_AT_DESIGN_TIME, Boolean.TRUE);
keys.add(desc);
}
return keys.iterator();
}
@Override
public Class<Object> getType(ELContext context,
Object base,
Object property)
{
if (base != null)
return null;
context.setPropertyResolved(true);
return Object.class;
}
@Override
public Object getValue(ELContext context,
Object base,
Object property)
{
if (base != null)
return null;
context.setPropertyResolved(true);
PageContext pageContext
= (PageContext) context.getContext(JspContext.class);
return pageContext.getAttribute(String.valueOf(property));
}
@Override
public boolean isReadOnly(ELContext context,
Object base,
Object property)
{
if (base != null)
return true;
context.setPropertyResolved(true);
return false;
}
@Override
public void setValue(ELContext context,
Object base,
Object property,
Object value)
{
if (base != null)
return;
context.setPropertyResolved(true);
context.setPropertyResolved(true);
PageContext pageContext
= (PageContext) context.getContext(JspContext.class);
pageContext.setAttribute(String.valueOf(property), value);
}
}