InjectionUtils failes to convert path-value to class annotated with XmlJavaTypeAdapter

package no.nrk.panorama.serum;

import static org.fest.assertions.Assertions.assertThat;

import java.lang.annotation.Annotation;

import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

import org.apache.cxf.jaxrs.model.ParameterType;
import org.apache.cxf.jaxrs.utils.InjectionUtils;
import org.apache.cxf.message.MessageImpl;
import org.junit.Test;

public class CXFInjectionUtilsJUnitTest {

	public static class Adapter extends XmlAdapter<String, Id> {

		@Override
		public String marshal(final Id id) throws Exception {
			return id.getId();
		}

		@Override
		public Id unmarshal(final String idStr) throws Exception {
			Id id = new DelegatingId();
			id.setId(idStr);
			return id;
		}
	}

	@XmlJavaTypeAdapter(Adapter.class)
	public interface Id {
		public String getId();

		public void setId(String id);
	}

	public static class DelegatingId implements Id {

		private String id;

		public String getId() {
			return this.id;
		}

		public void setId(String id) {
			this.id = id;
		}

	}

	@Test
	public void handleParameter_givenValidInput_shouldReturnIdWithCorrectValue() throws Exception {
		// Arrange
		String value = "1.1";

		// Act
		Object id = InjectionUtils.handleParameter(value, true, Id.class, new Annotation[] {}, ParameterType.PATH,
		      new MessageImpl());

		// Assert
		assertThat(id).isInstanceOf(Id.class);
		assertThat(((Id)id).getId()).isEqualTo(value);
	}

}