2009/05/20 - Apache Shale has been retired.

 /*

  * 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.shale.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 1.0.4

  */

 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();

         context.setPropertyResolved(true);

         ELContext elContext = fcontext.getELContext();

         VariableResolver vr = fcontext.getApplication().getVariableResolver();

         try {

             return vr.resolveVariable(fcontext, name);

         } 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");

         }

     }

 }