/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.myfaces.test.el;
import java.util.Iterator;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.PropertyNotFoundException;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.el.VariableResolver;
/**
* <p><code>ELResolver</code> implementation that wraps the legacy (JSF 1.1)
* <code>VariableResolver</code> chain. See the JSF 1.2 Specification, section
* 5.6.1.5, for requirements implemented by this class.</p>
*
* @since 1.0.0
*/
public class FacesVariableResolverChainWrapper extends AbstractELResolver
{
/**
* <p>Return the most general type this resolver accepts for the
* <code>property</code> argument.</p>
*/
public Class getCommonPropertyType(ELContext context, Object base)
{
if (base != null)
{
return null;
}
else
{
return String.class;
}
}
/**
* <p>Return an <code>Iterator</code> over the attributes that this
* resolver knows how to deal with.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
*/
public Iterator getFeatureDescriptors(ELContext context, Object base)
{
return null;
}
/**
* <p>Return the Java type of the specified property.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public Class getType(ELContext context, Object base, Object property)
{
if ((base == null) && (property == null))
{
throw new PropertyNotFoundException("No property specified");
}
return null;
}
/**
* <p>Evaluate with the legacy variable resolver chain and return
* the value.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public Object getValue(ELContext context, Object base, Object property)
{
if (base != null)
{
return null;
}
if (property == null)
{
throw new PropertyNotFoundException("No property specified");
}
FacesContext fcontext = (FacesContext) context
.getContext(FacesContext.class);
ExternalContext econtext = fcontext.getExternalContext();
String name = property.toString();
ELContext elContext = fcontext.getELContext();
VariableResolver vr = fcontext.getApplication().getVariableResolver();
try
{
Object value = vr.resolveVariable(fcontext, name);
if (value != null)
{
context.setPropertyResolved(true);
}
return value;
}
catch (Exception e)
{
context.setPropertyResolved(false);
throw new ELException(e);
}
}
/**
* <p>Return <code>true</code> if the specified property is read only.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
*/
public boolean isReadOnly(ELContext context, Object base, Object property)
{
if ((base == null) && (property == null))
{
throw new PropertyNotFoundException("No property specified");
}
return false;
}
/**
* <p>Set the value of a scoped object for the specified name.</p>
*
* @param context <code>ELContext</code> for evaluating this value
* @param base Base object against which this evaluation occurs
* (must be null because we are evaluating a top level variable)
* @param property Property name to be accessed
* @param value New value to be set
*/
public void setValue(ELContext context, Object base, Object property,
Object value)
{
if ((base == null) && (property == null))
{
throw new PropertyNotFoundException("No property specified");
}
}
}