extractPropertId

WorkPlan

		private Serializable extractProperId(Work<T> work) {
			T entity = work.getEntity();
			// 1) entity is null for purge operation, which requires to trust the work id
			// 2) types mapped as provided id require to use the work id
			// 3) when Hibernate identifier rollback is used && this identifier is our same id source, we need to get the value from work id
			if ( entity == null
					|| documentBuilder.requiresProvidedId()
					|| ( work.isIdentifierWasRolledBack() && documentBuilder.isIdMatchingJpaId() ) ) {
				return work.getId();
			}
			else {
//				return documentBuilder.getId( entity );
				Serializable id = documentBuilder.getId( entity );
				if ( id != null ) {
					return id;
				}
				else {
					return work.getId();
				}
			}
		}