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/*
* Copyright 2004-2008 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.faces.expression;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.faces.el.EvaluationException;
import javax.faces.el.PropertyNotFoundException;
import javax.faces.el.PropertyResolver;
/**
* A JSF 1.1 {@link PropertyResolver} that delegates to a wrapped Unified EL resolver chain for property resolution.
*
* @author Jeremy Grelle
*/
public abstract class ELDelegatingPropertyResolver extends PropertyResolver {
private PropertyResolver nextResolver;
private ELResolver delegate;
public ELDelegatingPropertyResolver(PropertyResolver nextResolver, ELResolver delegate) {
this.nextResolver = nextResolver;
this.delegate = delegate;
}
public Class getType(Object base, int index) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
Class type = elContext.getELResolver().getType(elContext, base, new Integer(index));
if (elContext.isPropertyResolved()) {
return type;
} else {
return nextResolver.getType(base, index);
}
}
public Class getType(Object base, Object property) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
Class type = elContext.getELResolver().getType(elContext, base, property);
if (elContext.isPropertyResolved()) {
return type;
} else {
return nextResolver.getType(base, property);
}
}
public Object getValue(Object base, int index) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
Object value = elContext.getELResolver().getValue(elContext, base, new Integer(index));
if (elContext.isPropertyResolved()) {
return value;
} else {
return nextResolver.getValue(base, index);
}
}
public Object getValue(Object base, Object property) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
Object value = elContext.getELResolver().getValue(elContext, base, property);
if (elContext.isPropertyResolved()) {
return value;
} else {
return nextResolver.getValue(base, property);
}
}
public boolean isReadOnly(Object base, int index) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
boolean readOnly = elContext.getELResolver().isReadOnly(elContext, base, new Integer(index));
if (elContext.isPropertyResolved()) {
return readOnly;
} else {
return nextResolver.isReadOnly(base, index);
}
}
public boolean isReadOnly(Object base, Object property) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
boolean readOnly = elContext.getELResolver().isReadOnly(elContext, base, property);
if (elContext.isPropertyResolved()) {
return readOnly;
} else {
return nextResolver.isReadOnly(base, property);
}
}
public void setValue(Object base, int index, Object value) throws EvaluationException, PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
elContext.getELResolver().setValue(elContext, base, new Integer(index), value);
if (!elContext.isPropertyResolved()) {
nextResolver.setValue(base, index, value);
}
}
public void setValue(Object base, Object property, Object value) throws EvaluationException,
PropertyNotFoundException {
ELContext elContext = new SimpleELContext(delegate);
elContext.getELResolver().setValue(elContext, base, property, value);
if (!elContext.isPropertyResolved()) {
nextResolver.setValue(base, property, value);
}
}
}
