Jaxb ignore namespace

I use Jaxb2 and Spring. I am trying to unmarshal some XML that are sent by 2 of my customers.

Up to now, I only had to handle one customer which sent some xml like this :

<foo xmlns="com.acme">
  <bar>[...]</bar>
<foo>

that is bound to a POJO like this :

@XmlType(name = "", propOrder = {"bar"})
@XmlRootElement(name = "Foo")
public class Foo {

  @XmlElement(name = "Bar")
  private String bar;

  [...]
}

I discovered that the previous developer hardcoded the namespace in the unmarshaller in order to make it work.

Now, the second customer sends the same XML but changes the namespace!

<foo xmlns="com.xyz">
  <bar>[...]</bar>
<foo>

Obviously, the unmarshaller fails to unmarshall because it expects some {com.acme}foo instead of {com.xyz}foo. Unforunately, asking the customer to change the XML is not an option.

What I tried :

1) In application-context.xml, I searched for a configuration which would allow me to ignore the namespace but could not find one :

<bean id="marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
  <property name="packagesToScan">
    <list>
      <value>com.mycompany.mypkg</value>
    </list>
  </property>
  <property name="marshallerProperties">
    <map>
      <entry key="???"><value type="java.lang.Boolean">false</value></entry>
    </map>
  </property>
</bean>

it seems that the only available options are the ones listed in the Jaxb2Marshaller's Javadoc :

/**
 * Set the JAXB {@code Marshaller} properties. These properties will be set on the
 * underlying JAXB {@code Marshaller}, and allow for features such as indentation.
 * @param properties the properties
 * @see javax.xml.bind.Marshaller#setProperty(String, Object)
 * @see javax.xml.bind.Marshaller#JAXB_ENCODING
 * @see javax.xml.bind.Marshaller#JAXB_FORMATTED_OUTPUT
 * @see javax.xml.bind.Marshaller#JAXB_NO_NAMESPACE_SCHEMA_LOCATION
 * @see javax.xml.bind.Marshaller#JAXB_SCHEMA_LOCATION
 */
public void setMarshallerProperties(Map<String, ?> properties) {
    this.marshallerProperties = properties;
}

2) I also tried to configure the unmarshaller in the code :

try {
  jc = JAXBContext.newInstance("com.mycompany.mypkg");

  Unmarshaller u = jc.createUnmarshaller();
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
  dbf.setNamespaceAware(false);//Tried this option.

  DocumentBuilder db = dbf.newDocumentBuilder();
  Document doc = db.parse(xmlFile.toFile());
  u.unmarshal(new DOMSource(doc));
  return (CompositionPlaylist)u.unmarshal(new StreamSource(xmlFile.toFile()));
} catch (ParserConfigurationException | SAXException | IOException | JAXBException e) {
  LOGGER.error("Erreur Unmarshalling CPL");
}

It also did not work. Any idea?