Extend UIComponent#getFacet for using enums

[tandraschko]

In case when a component lib like PF would like to use Facets in similar way like PropertyKeys:

    public enum PropertyKeys {
        @Property(description = "Name of the field associated to bean 'var'", type = String.class)
        field,
        footerText,
        @Property(description = "Shortcut for header facet", type = String.class)
        headerText,
        style,
        styleClass,
        converter
    }

    public enum FacetKeys {
        @Facet(description = "")
        header,
        @Facet(description = "")
        footer
    }

and

UIComponent header = column.getFacet(ColumnBase.FacetKeys.header);

we can simply add the following method to UIComponent/Base:

    public abstract UIComponent getFacet(Enum<?> facet);

    @Override
    public UIComponent getFacet(Enum<?> facet) {
            return getFacet(facet.name());
    }

[BalusC]

Interesting idea.

What do we do with UIComponent getFacet(String name)? Deprecate it?

And how about Map<String, UIComponent> getFacets()? Should there be an equivalent returning EnumMap?

[tandraschko]

For now i would just keep the string method.

The Map getFacets method would be a good addition, i just didnt need it yet.