org.springframework.faces.expression.ELDelegatingVariableResolver Maven / Gradle / Ivy
/*
* 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.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.VariableResolver;
/**
* A JSF 1.1 {@link VariableResolver} that delegates to a wrapped Unified EL resolver chain for variable resolution.
*
* @author Jeremy Grelle
*/
public abstract class ELDelegatingVariableResolver extends VariableResolver {
private VariableResolver nextResolver;
private ELResolver delegate;
public ELDelegatingVariableResolver(VariableResolver nextResolver, ELResolver delegate) {
this.nextResolver = nextResolver;
this.delegate = delegate;
}
public Object resolveVariable(FacesContext facesContext, String name) throws EvaluationException {
ELContext elContext = new SimpleELContext(delegate);
Object result = elContext.getELResolver().getValue(elContext, null, name);
if (elContext.isPropertyResolved()) {
return result;
} else {
return nextResolver.resolveVariable(facesContext, name);
}
}
}