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DefaultELResolverBuilder.java
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DefaultELResolverBuilder.java
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/*
* 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.el;
import org.apache.myfaces.el.resolver.FlashELResolver;
import java.util.ArrayList;
import java.util.List;
import jakarta.el.ArrayELResolver;
import jakarta.el.BeanELResolver;
import jakarta.el.CompositeELResolver;
import jakarta.el.ELResolver;
import jakarta.el.ListELResolver;
import jakarta.el.MapELResolver;
import jakarta.el.ResourceBundleELResolver;
import jakarta.el.StaticFieldELResolver;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.faces.component.UIInput;
import jakarta.faces.context.FacesContext;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.myfaces.cdi.util.CDIUtils;
import org.apache.myfaces.config.RuntimeConfig;
import org.apache.myfaces.config.webparameters.MyfacesConfig;
import org.apache.myfaces.el.resolver.CompositeComponentELResolver;
import org.apache.myfaces.el.resolver.ImportConstantsELResolver;
import org.apache.myfaces.el.resolver.ImportHandlerResolver;
import org.apache.myfaces.el.resolver.ResourceBundleResolver;
import org.apache.myfaces.el.resolver.ResourceResolver;
import org.apache.myfaces.el.resolver.ScopedAttributeResolver;
import org.apache.myfaces.el.resolver.implicitobject.ImplicitObjectResolver;
import org.apache.myfaces.core.api.shared.lang.PropertyDescriptorUtils;
import org.apache.myfaces.el.resolver.EmptyStringToNullELResolver;
import org.apache.myfaces.el.resolver.LambdaBeanELResolver;
/**
* Create the el resolver for faces. see 1.2 spec section 5.6.2
*
* @author Mathias Broekelmann (latest modification by $Author$)
* @version $Revision$ $Date$
*/
public class DefaultELResolverBuilder extends ELResolverBuilder
{
private static final Logger LOG = Logger.getLogger(DefaultELResolverBuilder.class.getName());
public static final List<String> CDI_EL_RESOLVERS = Arrays.asList(
"org.apache.webbeans.el22.WebBeansELResolver",
"org.apache.webbeans.el.WebBeansELResolver",
"org.jboss.weld.module.web.el.WeldELResolver",
"org.jboss.weld.environment.servlet.jsf.WeldApplication$LazyBeanManagerIntegrationELResolver");
public DefaultELResolverBuilder(RuntimeConfig runtimeConfig, MyfacesConfig myfacesConfig)
{
super(runtimeConfig, myfacesConfig);
}
@Override
public void build(FacesContext facesContext, CompositeELResolver compositeElResolver)
{
MyfacesConfig config = MyfacesConfig.getCurrentInstance(FacesContext.getCurrentInstance());
// add the ELResolvers to a List first to be able to sort them
List<ELResolver> list = new ArrayList<>();
boolean replaceImplicitObjectResolverWithCDIResolver =
isReplaceImplicitObjectResolverWithCDIResolver(facesContext);
if (replaceImplicitObjectResolverWithCDIResolver)
{
list.add(ImplicitObjectResolver.makeResolverForCDI());
list.add(getCDIELResolver());
}
else
{
list.add(ImplicitObjectResolver.makeResolver());
}
list.add(new CompositeComponentELResolver(config));
// the spec forces us to add BeanManager#getELResolver manually
// but both CDI impls also add this ELResolver... remove it here
// see https://github.com/jakartaee/faces/issues/1798
if (replaceImplicitObjectResolverWithCDIResolver)
{
List<ELResolver> temp = new ArrayList<>();
addFromRuntimeConfig(temp);
temp.removeIf(resolver -> CDI_EL_RESOLVERS.contains(resolver.getClass().getName()));
list.addAll(temp);
}
else
{
addFromRuntimeConfig(list);
}
if ("true".equalsIgnoreCase(
facesContext.getExternalContext().getInitParameter(UIInput.EMPTY_STRING_AS_NULL_PARAM_NAME)))
{
list.add(new EmptyStringToNullELResolver());
}
//Flash object is instanceof Map, so it is necessary to resolve
//before MapELResolver. Better to put this one before
list.add(new FlashELResolver());
list.add(new ResourceResolver());
list.add(new ResourceBundleELResolver());
list.add(new ResourceBundleResolver());
list.add(new ImportConstantsELResolver());
try
{
ELResolver streamElResolver = (ELResolver) runtimeConfig.getExpressionFactory().getStreamELResolver();
if (streamElResolver != null)
{
list.add(streamElResolver);
}
}
catch (Throwable ex)
{
LOG.log(Level.WARNING, "Could not add ExpressionFactory#getStreamELResolver!", ex);
}
try
{
list.add(new StaticFieldELResolver());
}
catch (Throwable ex)
{
LOG.log(Level.WARNING, "Could not add StaticFieldELResolver!", ex);
}
list.add(new MapELResolver());
list.add(new ListELResolver());
list.add(new ArrayELResolver());
if (PropertyDescriptorUtils.isUseLambdaMetafactory(facesContext.getExternalContext()))
{
list.add(new LambdaBeanELResolver());
}
else
{
list.add(new BeanELResolver());
}
// give the user a chance to sort the resolvers
sortELResolvers(list);
list = wrapELResolvers(list);
// give the user a chance to filter the resolvers
Iterable<ELResolver> filteredELResolvers = filterELResolvers(list);
// add the resolvers from the list to the CompositeELResolver
for (ELResolver resolver : filteredELResolvers)
{
compositeElResolver.add(resolver);
}
// Only add this resolver if the user wants to use the EL ImportHandler
if (config.isSupportEL3ImportHandler())
{
compositeElResolver.add(new ImportHandlerResolver());
}
// the ScopedAttributeResolver has to be the last one in every
// case, because it always sets propertyResolved to true (per the spec)
compositeElResolver.add(new ScopedAttributeResolver());
}
protected ELResolver getCDIELResolver()
{
BeanManager beanManager = CDIUtils.getBeanManager(FacesContext.getCurrentInstance());
return beanManager.getELResolver();
}
}