/*
* Copyright 2002-2007 the original author or authors.
*
* Licensed 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.springframework.web.jsf;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.VariableResolver;
/**
* This is a subclass of the JSF 1.1 {@link DelegatingVariableResolver},
* letting Spring bean definitions override other attributes of the same name.
*
* <p>The main purpose of this class is to provide behavior that is analogous
* to the JSF 1.2 {@link org.springframework.web.jsf.el.SpringBeanFacesELResolver}.
*
* @author Juergen Hoeller
* @since 2.5
* @see WebApplicationContextVariableResolver
* @see FacesContextUtils#getRequiredWebApplicationContext
*/
public class SpringBeanVariableResolver extends DelegatingVariableResolver {
public SpringBeanVariableResolver(VariableResolver originalVariableResolver) {
super(originalVariableResolver);
}
public Object resolveVariable(FacesContext facesContext, String name) throws EvaluationException {
Object bean = resolveSpringBean(facesContext, name);
if (bean != null) {
return bean;
}
Object value = resolveOriginal(facesContext, name);
if (value != null) {
return value;
}
return null;
}
}