/*
* 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.convert;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import javax.el.ExpressionFactory;
import javax.el.PropertyNotFoundException;
import javax.el.PropertyNotWritableException;
import javax.faces.FactoryFinder;
import javax.faces.application.ApplicationFactory;
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;
import org.apache.myfaces.el.DefaultPropertyResolver;
/**
* Wrapper that converts a VariableResolver into an ELResolver. See JSF 1.2 spec section 5.6.1.6
*
* @author Stan Silvert (latest modification by $Author: lu4242 $)
* @author Mathias Broekelmann
* @version $Revision: 1215316 $ $Date: 2011-12-16 23:07:07 +0100 (Fri, 16 Dec 2011) $
*/
@SuppressWarnings("deprecation")
public final class PropertyResolverToELResolver extends ELResolver
{
private PropertyResolver propertyResolver;
private ExpressionFactory expressionFactory;
private boolean isDefaultLegacyPropertyResolver;
/**
* Creates a new instance of PropertyResolverToELResolver
*/
public PropertyResolverToELResolver(final PropertyResolver propertyResolver)
{
this.propertyResolver = propertyResolver;
this.isDefaultLegacyPropertyResolver = (propertyResolver instanceof DefaultPropertyResolver);
}
@Override
public void setValue(final ELContext context, final Object base, final Object property, final Object value)
throws NullPointerException, PropertyNotFoundException, PropertyNotWritableException, ELException
{
if (isDefaultLegacyPropertyResolver)
{
return;
}
if (base == null || property == null)
{
return;
}
try
{
context.setPropertyResolved(true);
if (needsCoersion(base))
{
propertyResolver.setValue(base, coerceToInt(property), value);
}
else
{
propertyResolver.setValue(base, property, value);
}
// see: https://issues.apache.org/jira/browse/MYFACES-1670
context.setPropertyResolved(
FacesContext.getCurrentInstance().getELContext().isPropertyResolved());
}
catch (javax.faces.el.PropertyNotFoundException e)
{
context.setPropertyResolved(false);
throw new PropertyNotFoundException(e.getMessage(), e);
}
catch (EvaluationException e)
{
context.setPropertyResolved(false);
throw new ELException(e.getMessage(), e);
}
catch (RuntimeException e)
{
context.setPropertyResolved(false);
throw e;
}
}
@Override
public boolean isReadOnly(final ELContext context, final Object base, final Object property)
throws NullPointerException, PropertyNotFoundException, ELException
{
if (isDefaultLegacyPropertyResolver)
{
return false;
}
if (base == null || property == null)
{
return true;
}
try
{
boolean result;
context.setPropertyResolved(true);
if (needsCoersion(base))
{
result = propertyResolver.isReadOnly(base, coerceToInt(property));
}
else
{
result = propertyResolver.isReadOnly(base, property);
}
// see: https://issues.apache.org/jira/browse/MYFACES-1670
context.setPropertyResolved(
FacesContext.getCurrentInstance().getELContext().isPropertyResolved());
return result;
}
catch (javax.faces.el.PropertyNotFoundException e)
{
context.setPropertyResolved(false);
throw new PropertyNotFoundException(e.getMessage(), e);
}
catch (EvaluationException e)
{
context.setPropertyResolved(false);
throw new ELException(e.getMessage(), e);
}
catch (RuntimeException e)
{
context.setPropertyResolved(false);
throw e;
}
}
@Override
public Object getValue(final ELContext context, final Object base, final Object property)
throws NullPointerException, PropertyNotFoundException, ELException
{
if (isDefaultLegacyPropertyResolver)
{
return null;
}
if (base == null || property == null)
{
return null;
}
try
{
context.setPropertyResolved(true);
Object value;
if (needsCoersion(base))
{
value = propertyResolver.getValue(base, coerceToInt(property));
}
else
{
value = propertyResolver.getValue(base, property);
}
// see: https://issues.apache.org/jira/browse/MYFACES-1670
context.setPropertyResolved(
FacesContext.getCurrentInstance().getELContext().isPropertyResolved());
return value;
}
catch (javax.faces.el.PropertyNotFoundException e)
{
context.setPropertyResolved(false);
throw new PropertyNotFoundException(e.getMessage(), e);
}
catch (EvaluationException e)
{
context.setPropertyResolved(false);
throw new ELException(e.getMessage(), e);
}
catch (RuntimeException e)
{
context.setPropertyResolved(false);
throw e;
}
}
@Override
public Class<?> getType(final ELContext context, final Object base, final Object property)
throws NullPointerException, PropertyNotFoundException, ELException
{
if (isDefaultLegacyPropertyResolver)
{
return null;
}
if (base == null || property == null)
{
return null;
}
try
{
context.setPropertyResolved(true);
Class<?> value;
if (needsCoersion(base))
{
value = propertyResolver.getType(base, coerceToInt(property));
}
else
{
value = propertyResolver.getType(base, property);
}
// see: https://issues.apache.org/jira/browse/MYFACES-1670
context.setPropertyResolved(
FacesContext.getCurrentInstance().getELContext().isPropertyResolved());
return value;
}
catch (javax.faces.el.PropertyNotFoundException e)
{
context.setPropertyResolved(false);
throw new PropertyNotFoundException(e.getMessage(), e);
}
catch (EvaluationException e)
{
context.setPropertyResolved(false);
throw new ELException(e.getMessage(), e);
}
catch (RuntimeException e)
{
context.setPropertyResolved(false);
throw e;
}
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base)
{
return null;
}
@Override
public Class<?> getCommonPropertyType(ELContext context, Object base)
{
if (isDefaultLegacyPropertyResolver)
{
return null;
}
if (base == null)
{
return null;
}
return Object.class;
}
private static boolean needsCoersion(Object base)
{
return (base instanceof List) || base.getClass().isArray();
}
protected ExpressionFactory getExpressionFactory()
{
if (expressionFactory == null)
{
ApplicationFactory appFactory = (ApplicationFactory) FactoryFinder
.getFactory(FactoryFinder.APPLICATION_FACTORY);
expressionFactory = appFactory.getApplication().getExpressionFactory();
}
return expressionFactory;
}
public void setExpressionFactory(ExpressionFactory expressionFactory)
{
this.expressionFactory = expressionFactory;
}
private int coerceToInt(Object property)
{
return (Integer) getExpressionFactory().coerceToType(property, Integer.class);
}
public PropertyResolver getPropertyResolver()
{
return propertyResolver;
}
}