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package com.sun.faces.el;

import com.sun.faces.util.RequestStateManager;

import java.beans.FeatureDescriptor;
import java.util.Iterator;

import javax.el.ELResolver;
import javax.el.ELContext;
import javax.el.CompositeELResolver;
import javax.el.ELException;

import javax.faces.context.FacesContext;

/**
 * Maintains an ordered composite list of child ELResolver for JSF.
 *
 */
public abstract class FacesCompositeELResolver extends CompositeELResolver
{
  /**
   * JSP indicates this CompositeELResolver instance is the
   * JSP chain, specified in section 5.6.1 of the spec.
   *
   * Faces indicates this CompositeELResolver instance is the
   * JSF chain, specified in section 5.6.2 of the spec.
   */

  public enum ELResolverChainType {
      JSP,
      Faces
  }

  public abstract ELResolverChainType getChainType();

  public abstract void addRootELResolver(ELResolver elResolver);

  public abstract void addPropertyELResolver(ELResolver elResolver);
}