/*
* 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 com.caucho.jsf.el;
import com.caucho.el.AbstractVariableResolver;
import com.caucho.jsf.application.*;
import com.caucho.jsf.cfg.*;
import com.caucho.jsp.el.*;
import com.caucho.config.el.*;
import javax.el.*;
import javax.faces.component.*;
import javax.faces.context.*;
import java.beans.FeatureDescriptor;
import java.util.*;
/**
* Variable resolution for JSF variables
*/
public class FacesJspELResolver extends ELResolver {
private static final ArrayList<FeatureDescriptor> _implicitFeatureDescriptors
= new ArrayList<FeatureDescriptor>();
private static HashMap<String,Type> _typeMap
= new HashMap<String,Type>();
private ApplicationImpl _app;
private ELResolver _managedBeanResolver;
private ELResolver _cdiResolver;
private ELResolver _resourceBundleResolver;
public FacesJspELResolver(ApplicationImpl app)
{
_app = app;
FacesContextELResolver facesResolver
= (FacesContextELResolver) _app.getELResolver();
_managedBeanResolver = facesResolver.getManagedBeanResolver();
_cdiResolver = new CandiElResolver();
_resourceBundleResolver = facesResolver.getResourceBundleResolver();
}
@Override
public Class<?> getCommonPropertyType(ELContext env,
Object base)
{
return null;
}
private static Class common(Class a, Class b)
{
if (a == null)
return b;
else if (b == null)
return a;
else if (a.isAssignableFrom(b))
return a;
else if (b.isAssignableFrom(a))
return b;
else // XXX:
return Object.class;
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext env,
Object base)
{
ArrayList<FeatureDescriptor> descriptors
= new ArrayList<FeatureDescriptor>();
descriptors.addAll(_implicitFeatureDescriptors);
addDescriptors(descriptors,
_managedBeanResolver.getFeatureDescriptors(env, base));
addDescriptors(descriptors,
_cdiResolver.getFeatureDescriptors(env, base));
addDescriptors(descriptors,
_resourceBundleResolver.getFeatureDescriptors(env, base));
return descriptors.iterator();
}
private void addDescriptors(ArrayList<FeatureDescriptor> descriptors,
Iterator<FeatureDescriptor> iter)
{
if (iter == null)
return;
while (iter.hasNext()) {
FeatureDescriptor desc = iter.next();
descriptors.add(desc);
}
}
@Override
public Class getType(ELContext env, Object base, Object property)
{
if (base == null && property instanceof String) {
Type type = _typeMap.get((String) property);
if (type != null) {
env.setPropertyResolved(true);
return null;
}
}
return null;
}
@Override
public Object getValue(ELContext env, Object base, Object property)
{
env.setPropertyResolved(false);
if (base == null && property instanceof String) {
Type type = _typeMap.get((String) property);
if (type != null) {
env.setPropertyResolved(true);
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null) {
switch (type) {
case FACES_CONTEXT:
return facesContext;
case VIEW:
return facesContext.getViewRoot();
}
}
}
Object value = _cdiResolver.getValue(env, base, property);
if (env.isPropertyResolved())
return value;
value = _managedBeanResolver.getValue(env, base, property);
if (env.isPropertyResolved())
return value;
value = _resourceBundleResolver.getValue(env, base, property);
if (env.isPropertyResolved())
return value;
}
return null;
}
@Override
public boolean isReadOnly(ELContext env, Object base, Object property)
{
env.setPropertyResolved(false);
if (base == null && property instanceof String) {
Type type = _typeMap.get((String) property);
if (type != null) {
env.setPropertyResolved(true);
return true;
}
}
return false;
}
@Override
public void setValue(ELContext env,
Object base,
Object property,
Object value)
{
if (base == null && property instanceof String) {
String key = (String) property;
Type type = _typeMap.get(key);
if (type != null) {
throw new PropertyNotWritableException(key);
}
}
}
enum Type {
FACES_CONTEXT,
VIEW
};
private static void addDescriptor(String name, Class type)
{
FeatureDescriptor desc = new FeatureDescriptor();
desc.setName(name);
desc.setDisplayName(name);
desc.setExpert(false);
desc.setHidden(false);
desc.setPreferred(true);
desc.setValue(ELResolver.RESOLVABLE_AT_DESIGN_TIME, Boolean.TRUE);
desc.setValue(ELResolver.TYPE, type);
_implicitFeatureDescriptors.add(desc);
}
static {
_typeMap.put("facesContext", Type.FACES_CONTEXT);
_typeMap.put("view", Type.VIEW);
addDescriptor("facesContext", FacesContext.class);
addDescriptor("view", UIViewRoot.class);
}
}