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 FacesCompositeELResolver(FacesCompositeELResolver.ELResolverChainType chainType) 
{
        this.chainType = chainType;
}

Guarantee that this instance knows of what chain it is a member.

Parameters:

chainType - the ELResolverChainType

 public  void add(ELResolver elResolver) 
{
                                                                             
        super.add(elResolver);
}

 public Class getCommonPropertyType(ELContext context,
    Object base) 
{
        return null;
}

 public Iterator getFeatureDescriptors(ELContext context,
    Object base) 
{
        setChainType();
        Iterator< FeatureDescriptor > result = super.getFeatureDescriptors(context, base);
        clearChainType();
        return result;
}

 public Class getType(ELContext context,
    Object base,
    Object property) throws ELException 
{
        context.setPropertyResolved(false);
        if (FacesContext.getCurrentInstance() == null) {
            return null;
        }
        setChainType();
        Class< ? > result = super.getType(context, base, property);
        clearChainType();
        return result;
}

 public Object getValue(ELContext context,
    Object base,
    Object property) throws ELException 
{
        
        context.setPropertyResolved(false);
        if (FacesContext.getCurrentInstance() == null) {
            return null;
        }                    
        setChainType();
        Object result = super.getValue(context, base, property);
        clearChainType();
        return result;
}

 public boolean isReadOnly(ELContext context,
    Object base,
    Object property) throws ELException 
{
        context.setPropertyResolved(false);
        if (FacesContext.getCurrentInstance() == null) {
            return false;
        }
        setChainType();
        boolean result = super.isReadOnly(context, base, property);
        clearChainType();
        return result;
}

 public  void setValue(ELContext context,
    Object base,
    Object property,
    Object val) throws ELException 
{
        context.setPropertyResolved(false);
        if (FacesContext.getCurrentInstance() == null) {
            return;
        }
        setChainType();
        super.setValue(context, base, property, val);
        clearChainType();
}