java - EclipseLink JPA Object is not a known entity type -

i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type.

here keypointimpl code:

@entity @table(name="keypoints") public class keypointimpl implements keypoint {     @id     @generatedvalue(strategy = generationtype.identity)     private int id;     @enumerated(enumtype.string)     private detectortype keypointtype;     private float x;     private float y;     private float size;     private float angle;     private float response;     private int octave;     private int classid;     ... } 

here keypointlistimpl code:

@entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist {     @id     @generatedvalue(strategy = generationtype.identity)     private int id;     @onetoone(cascade={cascadetype.all}, targetentity=keypointimpl.class)     private list<keypoint> keypoints;     ... } 

here mains content:

    keypoint kp1 = new keypointimpl(detectortype.fast, 5, 5, 10, 90, 2, 3, 0);     keypoint kp2 = new keypointimpl(detectortype.fast, 6, 6, 3, 45, 1, 2, 1);      em.persist(kp1);     em.persist(kp2);      list<keypoint> keypoints = new arraylist<keypoint>();     keypoints.add(kp1);     keypoints.add(kp2);      keypointlist keypointlist = new keypointlistimpl();     keypointlist.setkeypointlist(keypoints);      em.persist(keypointlist); 

the tables constructed fine. keypointslists(id, keypoints_id) , keypoints(..., ...) table.

can point me error please?! :-)

as requested persistence.xml well

<?xml version="1.0" encoding="utf-8" ?> <persistence xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"     xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"     version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">      <persistence-unit name="audimodelrecognition" transaction-type="resource_local">          <class>amr.model.keypointimpl</class>         <class>amr.model.keypointlistimpl</class>          <properties>             <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.driver" />             <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/amr" />             <property name="javax.persistence.jdbc.user" value="arm" />             <property name="javax.persistence.jdbc.password" value="..." />               <!-- eclipselink should create database schema automatically -->             <property name="eclipselink.ddl-generation" value="create-tables" />             <property name="eclipselink.ddl-generation.output-mode" value="database" />         </properties>      </persistence-unit> </persistence> 

than i'll write comment answer: @onetoone on list looks wrong. use @onetomany.