expose PojoRepository.getId

(cherry picked from commit ca96e23)

Author: sammefford

src/main/java/com/marklogic/client/impl/PojoRepositoryImpl.java

@@ -500,7 +500,7 @@ private void findId() {
     }
 
     @SuppressWarnings("unchecked")
-    private ID getId(T entity) {
+    public ID getId(T entity) {
         findId();
         if ( idMethod != null ) {
             try {

src/main/java/com/marklogic/client/pojo/PojoRepository.java

@@ -82,6 +82,11 @@
  * precision, use Strings to persist those numbers.
  */
 public interface PojoRepository<T, ID extends Serializable> {
+    /** Get the value of the id field (the field marked with the {@literal @}Id 
+     * annotation).
+     */
+    public ID getId(T entity);
+
     /** Write this instance to the database.  Uses the field marked with {@literal @}Id 
      * annotation to generate a unique uri for the document.  Adds a collection with the 
      * fully qualified class name.  Uses a particular configuration of 

src/test/java/com/marklogic/client/test/PojoFacadeTest.java

@@ -638,6 +638,7 @@ private void validateCity(City city) {
         assertNotNull("City should never be null", city);
         assertNotNull("GeoNamId should never be null", city.getGeoNameId());
         if ( "Chittagong".equals(city.getName()) ) {
+            assertEquals("Chittagong should have id 1205733", 1205733, cities.getId(city).intValue());
             BulkReadWriteTest.validateChittagong(city);
         }
     }