Fast Object Database for Java - with JPA/JDO support

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3

Freeze during save

.TVS.cascade(TVS.java:157) at com.objectdb.o.OBM.aO(OBM.java:283) at com.objectdb ... with cascading a persist operation. But more information is needed in order to find out the cause. Currently there is no similar open issue. During cascading objects are tracked and every object is handled
3

Persist error @ManyToMany how to define correct entities relationships

private long id; @ManyToMany(cascade=CascadeType.PERSIST) private List categories ... private long id; @ManyToMany(cascade=CascadeType.PERSIST) private List ... //@GeneratedValue private long id; @ManyToMany(cascade=CascadeType.PERSIST
3

persisting object with long[][] arrays of array

= FetchType.EAGER, cascade = CascadeType.ALL) public long[] time;     @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL) private long[][] a1;     @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL) private long[][] a2;     @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType
3

OneToOne.orphanRemoval

Annotation Element javax.persistence.OneToOne boolean orphanRemoval (Optional) Whether to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities. Default value: false Since: JPA 2.0
3

CascadeType.REMOVE

Enum Constant javax.persistence.CascadeType REMOVE Cascade remove operation Since: JPA 1.0
3

CascadeType.REFRESH

Enum Constant javax.persistence.CascadeType REFRESH Cascade refresh operation Since: JPA 1.0
3

javax.jdo.annotations.ForeignKeyAction

. Since: JDO 2.1 ForeignKeyAction CASCADE Since: JDO 2.1 ForeignKeyAction DEFAULT Since: JDO 2.1
3

CascadeType.PERSIST

Enum Constant javax.persistence.CascadeType PERSIST Cascade persist operation Since: JPA 1.0
3

CascadeType.MERGE

Enum Constant javax.persistence.CascadeType MERGE Cascade merge operation Since: JPA 1.0
3

CascadeType.DETACH

Enum Constant javax.persistence.CascadeType DETACH Cascade detach operation Since: JPA 2.0

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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