How can I join XmlAdapter to my @XmlRootElement

I have some XML

<?xml version="1.0" encoding="UTF-8"?>
<CAT>
<CATALOG>
<CD>
<title>affffff</title>
<year>1475</year>
</CD>
<CD>
<title>affffff</title>
<year>1475</year>
</CD>
</CATALOG>
</CAT>

For parsing with XmlAdapter i use next mapping

@XmlRootElement (name = "CAT")
@XmlAccessorType(XmlAccessType.FIELD)
public class Catalog {

    @XmlElement (name = "CATALOG")
    @XmlJavaTypeAdapter(MapAdapter.class)
    private Map<String, Item> properties;

but if I will exclude next XML tag (example below, same example but without tag "CAT")

  <CATALOG>
    <CD>
    <title>affffff</title>
    <year>1475</year>
    </CD>
    <CD>
    <title>affffff</title>
    <year>1475</year>
    </CD>
    </CATALOG>

I can not modify my mapping and put XmlAdapter on @XmlRootElement (name = "CATALOG") What I try bellow: (it is not working, XmlAdapter not matching...)

@XmlRootElement (name = "CATALOG")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlJavaTypeAdapter(MapAdapter.class)
public class Catalog {

    @XmlElement (name = "CD")
    private Map<String, Item> properties;

Question

How can I avoid this problem and connect my custom XmlAdapter to root XML tag ?