/* | |
* 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 1.0.4 | |
*/ | |
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(); | |
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"); | |
} | |
} | |
} |