org.apache.shale.test.el.FacesVariableResolverChainWrapper Maven / Gradle / Ivy
/*
* 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;
/**
* ELResolver implementation that wraps the legacy (JSF 1.1)
* VariableResolver chain. See the JSF 1.2 Specification, section
* 5.6.1.5, for requirements implemented by this class.
*
* @since 1.0.4
*/
public class FacesVariableResolverChainWrapper extends AbstractELResolver {
/**
* Return the most general type this resolver accepts for the
* property argument.
*/
public Class getCommonPropertyType(ELContext context, Object base) {
if (base != null) {
return null;
} else {
return String.class;
}
}
/**
* Return an Iterator over the attributes that this
* resolver knows how to deal with.
*
* @param context ELContext for evaluating this value
* @param base Base object against which this evaluation occurs
*/
public Iterator getFeatureDescriptors(ELContext context, Object base) {
return null;
}
/**
* Return the Java type of the specified property.
*
* @param context ELContext 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;
}
/**
* Evaluate with the legacy variable resolver chain and return
* the value.
*
* @param context ELContext 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);
}
}
/**
* Return true if the specified property is read only.
*
* @param context ELContext 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;
}
/**
* Set the value of a scoped object for the specified name.
*
* @param context ELContext 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");
}
}
}