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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 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 javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.PropertyResolver;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import java.util.List;
public class PropertyResolverChainWrapper extends ELResolver {
@SuppressWarnings("deprecation")
private PropertyResolver legacyPR = null;
@SuppressWarnings("deprecation")
public PropertyResolverChainWrapper(PropertyResolver propertyResolver) {
this.legacyPR = propertyResolver;
}
@Override
@SuppressWarnings("deprecation")
public Object getValue(ELContext context, Object base, Object property)
throws ELException {
if (base == null || property == null) {
return null;
}
Object result;
context.setPropertyResolved(true);
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
ELContext jsfEL = facesContext.getELContext();
jsfEL.setPropertyResolved(true);
if (base instanceof List || base.getClass().isArray()) {
Object indexObj = facesContext.getApplication().getExpressionFactory().
coerceToType(property, Integer.class);
int index = ((Integer)indexObj).intValue();
try {
result = legacyPR.getValue(base, index);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
} else {
try {
result = legacyPR.getValue(base, property);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
}
context.setPropertyResolved(jsfEL.isPropertyResolved());
return result;
}
@Override
@SuppressWarnings("deprecation")
public Class getType(ELContext context, Object base, Object property)
throws ELException {
if (base == null || property == null) {
return null;
}
Class result;
context.setPropertyResolved(true);
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
ELContext jsfEL = facesContext.getELContext();
jsfEL.setPropertyResolved(true);
if (base instanceof List || base.getClass().isArray()) {
Object indexObj = facesContext.getApplication().getExpressionFactory().
coerceToType(property, Integer.class);
int index = ((Integer)indexObj).intValue();
try {
result = legacyPR.getType(base, index);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
} else {
try {
result = legacyPR.getType(base, property);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
}
context.setPropertyResolved(jsfEL.isPropertyResolved());
return result;
}
@Override
@SuppressWarnings("deprecation")
public void setValue(ELContext context, Object base, Object property,
Object val) throws ELException {
if (base == null || property == null) {
return;
}
context.setPropertyResolved(true);
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
ELContext jsfEL = facesContext.getELContext();
jsfEL.setPropertyResolved(true);
if (base instanceof List || base.getClass().isArray()) {
Object indexObj = facesContext.getApplication().getExpressionFactory().
coerceToType(property, Integer.class);
int index = ((Integer)indexObj).intValue();
try {
legacyPR.setValue(base, index, val);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
} else {
try {
legacyPR.setValue(base, property, val);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
}
context.setPropertyResolved(jsfEL.isPropertyResolved());
}
@Override
@SuppressWarnings("deprecation")
public boolean isReadOnly(ELContext context, Object base, Object property)
throws ELException {
if (base == null || property == null) {
return false;
}
boolean result;
context.setPropertyResolved(true);
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
ELContext jsfEL = facesContext.getELContext();
jsfEL.setPropertyResolved(true);
if (base instanceof List || base.getClass().isArray()) {
Object indexObj = facesContext.getApplication().getExpressionFactory().
coerceToType(property, Integer.class);
int index = ((Integer)indexObj).intValue();
try {
result = legacyPR.isReadOnly(base, index);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
} else {
try {
result = legacyPR.isReadOnly(base, property);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
}
}
context.setPropertyResolved(jsfEL.isPropertyResolved());
return result;
}
@Override
public Iterator getFeatureDescriptors(ELContext context,
Object base) {
return null;
}
@Override
public Class getCommonPropertyType(ELContext context, Object base) {
if ( base == null ) {
return Object.class;
}
return null;
}
}