/*
* Copyright 2002-2008 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.el;
import javax.el.ELContext;
import javax.faces.context.FacesContext;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.access.el.SpringBeanELResolver;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.jsf.FacesContextUtils;
/**
* JSF 1.2 <code>ELResolver</code> that delegates to the Spring root
* <code>WebApplicationContext</code>, resolving name references to
* Spring-defined beans.
*
* <p>Configure this resolver in your <code>faces-config.xml</code> file as follows:
*
* <pre>
* <application>
* ...
* <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
* </application></pre>
*
* All your JSF expressions can then implicitly refer to the names of
* Spring-managed service layer beans, for example in property values of
* JSF-managed beans:
*
* <pre>
* <managed-bean>
* <managed-bean-name>myJsfManagedBean</managed-bean-name>
* <managed-bean-class>example.MyJsfManagedBean</managed-bean-class>
* <managed-bean-scope>session</managed-bean-scope>
* <managed-property>
* <property-name>mySpringManagedBusinessObject</property-name>
* <value>#{mySpringManagedBusinessObject}</value>
* </managed-property>
* </managed-bean></pre>
*
* with "mySpringManagedBusinessObject" defined as Spring bean in
* applicationContext.xml:
*
* <pre>
* <bean id="mySpringManagedBusinessObject" class="example.MySpringManagedBusinessObject">
* ...
* </bean></pre>
*
* @author Juergen Hoeller
* @since 2.5
* @see WebApplicationContextFacesELResolver
* @see org.springframework.web.jsf.FacesContextUtils#getRequiredWebApplicationContext
*/
public class SpringBeanFacesELResolver extends SpringBeanELResolver {
/**
* This implementation delegates to {@link #getWebApplicationContext}.
* Can be overridden to provide an arbitrary BeanFactory reference to resolve
* against; usually, this will be a full Spring ApplicationContext.
* @param elContext the current JSF ELContext
* @return the Spring BeanFactory (never <code>null</code>)
*/
@Override
protected BeanFactory getBeanFactory(ELContext elContext) {
return getWebApplicationContext(elContext);
}
/**
* Retrieve the web application context to delegate bean name resolution to.
* <p>The default implementation delegates to FacesContextUtils.
* @param elContext the current JSF ELContext
* @return the Spring web application context (never <code>null</code>)
* @see org.springframework.web.jsf.FacesContextUtils#getRequiredWebApplicationContext
*/
protected WebApplicationContext getWebApplicationContext(ELContext elContext) {
FacesContext facesContext = FacesContext.getCurrentInstance();
return FacesContextUtils.getRequiredWebApplicationContext(facesContext);
}
}
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