using HashMap in XSD

Question

Our applications uses java classes generated from XML Schema Definition (XSD). I need to use HashMap for storing key, value pairs.

The Result class should be something like this from xsd

public class Employee{
    private String name;
    private Map<String, Object> dataMap;
}

Tried schemagen, jaxbcontext etc, but still unable to do it successfully . Tried below in XSD but getting "List" in the generated java class (instead of map). Using JDK 1.8

<xs:complexType name="employee">
    <xs:sequence>
      <xs:element name="dataMap">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="entry" minOccurs="0" maxOccurs="unbounded">
              <xs:complexType>
                <xs:sequence>
                  <xs:element name="key" minOccurs="0" type="xs:string"/>
                  <xs:element name="value" minOccurs="0" type="xs:anyType"/>
                </xs:sequence>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="value" type="xs:string" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

Appreciate any help/suggestions