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Persist error @ManyToMany how to define correct entities relationships

too). @Entity public class Product implements Serializable { @Id @GeneratedValue ... = new ArrayList(); } @Entity public class Category implements Serializable { @Id ... .Serializable; import java.util.ArrayList; import java.util.List; import javax.persistence.CascadeType
3

javax.persistence.InheritanceType

javax.persistence Enum InheritanceType java.lang.Object java.lang.Enum<javax.persistence.InheritanceType> javax.persistence.InheritanceType Implemented Interfaces: Serializable, Comparable<InheritanceType> Defines inheritance strategy options. Since: JPA 1.0 InheritanceType JOINED
3

javax.persistence.PessimisticLockScope

javax.persistence Enum PessimisticLockScope java.lang.Object java.lang.Enum<javax.persistence.PessimisticLockScope> javax.persistence.PessimisticLockScope Implemented Interfaces: Serializable, Comparable<PessimisticLockScope> Defines the values of the javax.persistence.lock.scope
3

javax.persistence.CacheStoreMode

javax.persistence Enum CacheStoreMode java.lang.Object java.lang.Enum<javax.persistence.CacheStoreMode> javax.persistence.CacheStoreMode Implemented Interfaces: Serializable, Comparable<CacheStoreMode> Used as the value of the javax.persistence.cache.storeMode property to specify
0

javax.jdo.spi.PersistenceCapable

without notifying the StateManager. Since: JDO 1.0 byte SERIALIZABLE If jdoFieldFlags for a field includes SERIALIZABLE, then the field is not declared as TRANSIENT. If jdoFieldFlags for a field includes SERIALIZABLE, then the field is not declared as TRANSIENT. Since: JDO 1.0 void jdoCopyFields(Object
0

javax.jdo.listener.InstanceLifecycleEvent

javax.jdo.listener Class InstanceLifecycleEvent java.lang.Object java.util.EventObject javax.jdo.listener.InstanceLifecycleEvent Implemented Interfaces: Serializable This is the event ... Serializable interface from EventObject, it is not intended to be Serializable. Appropriate serialization
0

setTransactionIsolationLevel(level)

-uncommitted read-committed repeatable-read snapshot serializable Parameters: level ... _UNCOMMITTED Constants.TX_READ_COMMITTED Constants.TX_REPEATABLE_READ Constants.TX_SNAPSHOT Constants.TX_SERIALIZABLE
0

javax.jdo.spi.StateManager

( PersistenceCapable pc) Guarantee that the serializable transactional and persistent fields are loaded into the instance. Guarantee that the serializable transactional and persistent fields are loaded into
0

javax.jdo.Transaction

to high are: read-uncommitted read-committed repeatable-read snapshot serializable Parameters: level ... .TX_SERIALIZABLE void setNontransactionalRead(boolean nontransactionalRead) If true, allow persistent
0

setIsolationLevel(level)

are: read-uncommitted read-committed repeatable-read snapshot serializable Parameters: level ... _UNCOMMITTED Constants.TX_READ_COMMITTED Constants.TX_REPEATABLE_READ Constants.TX_SNAPSHOT Constants.TX_SERIALIZABLE

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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