com.sun.faces.el.ManagedBeanELResolver Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces Show documentation
Show all versions of jakarta.faces Show documentation
EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.el;
import com.sun.faces.application.ApplicationAssociate;
import com.sun.faces.mgbean.BeanBuilder;
import com.sun.faces.mgbean.BeanManager;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.Util;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import javax.el.PropertyNotFoundException;
import javax.faces.context.FacesContext;
import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.faces.context.ExternalContext;
public class ManagedBeanELResolver extends ELResolver {
public ManagedBeanELResolver() {
}
@Override
public Object getValue(ELContext context, Object base, Object property)
throws ELException {
if (base != null) {
return null;
}
if (property == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "property");
throw new PropertyNotFoundException(message);
}
return resolveBean(context, property, true);
}
@Override
public Class getType(ELContext context, Object base, Object property)
throws ELException {
if (base == null && property == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "property");
throw new PropertyNotFoundException(message);
}
return null;
}
@Override
public void setValue(ELContext context,
Object base,
Object property,
Object val)
throws ELException {
if (base == null && property == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "base and property");
throw new PropertyNotFoundException(message);
}
if (base == null) {
// create the bean if it doesn't exist. We won't mark the property
// as resolved in this case, since the spec requires us to actually
// wait to set the value until the ScopeAttributeELResolved so that
// implicit scopes with higher priority than this one have a crack
// at resolving the bean first
resolveBean(context, property, false);
}
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property)
throws ELException {
if (base != null) {
return false;
}
if (property == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "property");
throw new PropertyNotFoundException(message);
}
return false;
}
@Override
public Iterator getFeatureDescriptors(ELContext context, Object base) {
if (base != null) {
return null;
}
FacesContext facesContext =
(FacesContext) context.getContext(FacesContext.class);
BeanManager beanManager = getBeanManager();
if (beanManager == null || beanManager.getRegisteredBeans().isEmpty()) {
List l = Collections.emptyList();
return l.iterator();
}
Map beans = beanManager.getRegisteredBeans();
List list =
new ArrayList<>(beans.size());
// iterate over the list of managed beans
for (Map.Entry bean : beans.entrySet()) {
String beanName = bean.getKey();
BeanBuilder builder = bean.getValue();
String loc = Util.getLocaleFromContextOrSystem(facesContext).toString();
Map descriptions = builder.getDescriptions();
String description = null;
if (descriptions != null) {
description = descriptions.get(loc);
if (description == null) {
description = descriptions.get("DEFAULT");
}
}
list.add(Util.getFeatureDescriptor(beanName,
beanName,
(description == null) ? "" : description,
false,
false,
true,
builder.getBeanClass(),
Boolean.TRUE));
}
return list.iterator();
}
@Override
public Class getCommonPropertyType(ELContext context, Object base) {
if (base != null) {
return null;
}
return Object.class;
}
// --------------------------------------------------------- Private Methods
private static BeanManager getBeanManager() {
ApplicationAssociate associate = ApplicationAssociate.getCurrentInstance();
return ((associate != null) ? associate.getBeanManager() : null);
}
private Object resolveBean(ELContext context, Object property, boolean markAsResolvedIfCreated) {
Object result = null;
BeanManager manager = getBeanManager();
if (manager != null) {
String beanName = property.toString();
BeanBuilder builder = manager.getBuilder(beanName);
if (builder != null) {
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
// JAVASERVERFACES-2989: Make sure to check request, session, and application.
ExternalContext extContext = facesContext.getExternalContext();
if (extContext.getRequestMap().containsKey(beanName)) {
return null;
} else if (null != extContext.getSession(false) &&
extContext.getSessionMap().containsKey(beanName)) {
return null;
} else if (extContext.getApplicationMap().containsKey(beanName)) {
return null;
}
result = manager.getBeanFromScope(beanName, builder, facesContext);
if (result == null) {
result = manager.create(beanName, builder, facesContext);
}
context.setPropertyResolved(markAsResolvedIfCreated && (result != null));
}
}
return result;
}
}