com.sun.faces.el.VariableResolverImpl Maven / Gradle / Ivy
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package com.sun.faces.el;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.VariableResolver;
import javax.el.ELException;
import com.sun.faces.util.MessageUtils;
/**
*
* Concrete implementation of VariableResolver.
*
*/
@SuppressWarnings("deprecation")
public class VariableResolverImpl extends VariableResolver {
private VariableResolver delegate;
// ------------------------------------------- Methods from VariableResolver
// Specified by javax.faces.el.VariableResolver.resolveVariable()
public Object resolveVariable(FacesContext context, String name)
throws EvaluationException {
if (context == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "context");
throw new NullPointerException(message);
}
if (name == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "name");
throw new NullPointerException(message);
}
Object result;
if (delegate != null) {
result = delegate.resolveVariable(context, name);
} else {
try {
result = context.getApplication().getELResolver().getValue(context.getELContext(), null, name);
} catch (ELException elex) {
throw new EvaluationException(elex);
}
}
return result;
}
// ---------------------------------------------------------- Public Methods
public void setDelegate(VariableResolver delegate) {
this.delegate = delegate;
}
public VariableResolver getDelegate() {
return this.delegate;
}
}