[ http://issues.apache.org/jira/browse/OPENJPA-69?page=comments#action_12445222 ] Marc Prud'hommeaux commented on OPENJPA-69: -------------------------------------------
Can you post the exception message and complete stack trace? > Null reference from one Entity to other causes fault with OpenJPA 0.9.0 and > Apache Derby 10.1 when byte[] used as identity > -------------------------------------------------------------------------------------------------------------------------- > > Key: OPENJPA-69 > URL: http://issues.apache.org/jira/browse/OPENJPA-69 > Project: OpenJPA > Issue Type: Bug > Components: jpa > Environment: Windows XP, Java SE 1.5 (Sun JRE 1.5_06) > Reporter: Rusanov Dmitry > Attachments: sample.zip > > > Suppose we have following stuff: > Foo.java: > ------------ > package entity; > import javax.persistence.Column; > import javax.persistence.Entity; > import javax.persistence.Id; > import javax.persistence.IdClass; > import javax.persistence.ManyToOne; > import javax.persistence.Table; > @Entity > @Table(name="FOO") > @IdClass(BinaryId.class) > public class Foo > { > @Id > @Column(name="ID", length=16, nullable=false) > private byte[] id; > @ManyToOne > private Bar bar; > public void setId(byte[] id) > { > this.id = id; > } > public byte[] getId() > { > return id; > } > > public void setBar(Bar bar) > { > this.bar = bar; > } > public Bar getBar() > { > return bar; > } > } > Bar.java > ----------- > package entity; > import javax.persistence.Column; > import javax.persistence.Entity; > import javax.persistence.Id; > import javax.persistence.IdClass; > import javax.persistence.Table; > @Entity > @Table(name="FOO") > @IdClass(BinaryId.class) > public class Bar > { > @Id > @Column(name="ID", length=16, nullable=false) > private byte[] id; > @Column(length=32) > private String name; > public void setId(byte[] id) > { > this.id = id; > } > public byte[] getId() > { > return id; > } > > public void setName(String name) > { > this.name = name; > } > public String getName() > { > return name; > } > } > BinaryId.java (Identity class for byte[] identity): > -------------------------------------------- > package entity; > public class BinaryId > { > private byte[] id; > > public boolean equals(Object other) > { > if (other == this) > return true; > if (!(other instanceof BinaryId)) > return false; > BinaryId bi = (BinaryId)other; > if (id == bi.id) > return true; > if (id == null) > return false; > if (id.length != bi.id.length) > return false; > for (int i = 0; i < id.length; i++) > { > if (id[i] != bi.id[i]) > return false; > } > return true; > } > > public int hashCode() > { > if (id == null) > return 0; > int hash = 0; > for (int i = 0; i < id.length; i++) > hash += id[i]; > return hash; > } > } > persistence.xml > ---------------------- > <persistence xmlns="http://java.sun.com/xml/ns/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_1_0.xsd"; > version="1.0"> > <persistence-unit name="openjpa"> > > <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider> > <class>entity.Foo</class> > <class>entity.Bar</class> > <properties> > <property name="openjpa.ConnectionURL" > value="jdbc:derby:c:/derbydb/ojpa-bug"/> > <property name="openjpa.ConnectionDriverName" > value="org.apache.derby.jdbc.EmbeddedDriver"/> > <property name="openjpa.Log" value="DefaultLevel=WARN, > Tool=INFO"/> > </properties> > </persistence-unit> > </persistence> > create.sql > ------------- > CREATE TABLE APP.foo ( > id CHAR(16) FOR BIT DATA NOT NULL, > bar_id CHAR(16) FOR BIT DATA, > PRIMARY KEY(id) ); > CREATE TABLE APP.bar ( > id CHAR(16) FOR BIT DATA NOT NULL, > name VARCHAR(32), > PRIMARY KEY(id) ); > > With all this stuff following portion of code causes exception: > EntityManagerFactory emf = > Persistence.createEntityManagerFactory("openjpa"); > EntityManager entityManager = emf.createEntityManager(); > Foo foo = new Foo(); > byte[] id = new byte[16]; > for (int i = 0; i < 16; i++) > id[i] = (byte)(i + 16); > foo.setId(id); > > EntityTransaction txn = entityManager.getTransaction(); > try > { > txn.begin(); > entityManager.persist(foo); > txn.commit(); > } > catch (Exception e) > { > e.printStackTrace(); > } > If run the same code with MS SQL Server 2000 in place of Derby everything is > working. Seems to me this problem is caused by typed nature of NULL in Apache > Derby. If so the same problem should be with IBM DB2. > I couldn't attach full packaged sample (don't know how). But I can send it if > needed. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
