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https://issues.apache.org/jira/browse/OPENJPA-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Patrick Linskey updated OPENJPA-69:
-----------------------------------
Fix Version/s: (was: 1.1.0)
1.2.0
> 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: https://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
> Fix For: 1.2.0
>
> 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.
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