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3

Paths and Types in JPQL and Criteria API

Type Expressions The TYPE operator (which is new in JPA 2) returns the type of a specified argument
3

Updating JPA Entity Objects

); em.getTransaction().begin(); employee.projects[0] = new Project(); // not detected
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Server User List

for read. modify - permission to modify the content of a database. create - permission to create new
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JPA Exceptions

) . For example, if a transaction fails because of an attempt to store a new entity object with a primary
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JPA Primary Key

64 bit number (long) that is set automatically by ObjectDB for every new entity object
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javax.persistence.EntityExistsException

See Also: javax.persistence.EntityManager.persist(Object) EntityExistsException() Constructs a new EntityExistsException exception with null as its detail message. Constructs a new EntityExistsException ... a new EntityExistsException exception with the specified detail message. Constructs a new
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javax.persistence.RollbackException

See Also: javax.persistence.EntityTransaction.commit() RollbackException() Constructs a new RollbackException exception with null as its detail message. Constructs a new RollbackException exception with null as its detail message. Since: JPA 1.0 RollbackException(String message) Constructs a new
0

JPA Web App Tutorial - IntelliJ Project

the Configurations dialog box. Run the project in IntelliJ IDEA: Select the new run configuration at the toolbar
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Java EE 6 JPA Tutorial - IntelliJ Project

the Configurations dialog box. Run the project in IntelliJ IDEA: Select the new run configuration
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javax.jdo.JDOUnsupportedOptionException

the JDO implementation. Since: JDO 1.0 JDOUnsupportedOptionException() Constructs a new JDOUnsupportedOptionException without a detail message. Constructs a new JDOUnsupportedOptionException without a detail message. Since: JDO 1.0 JDOUnsupportedOptionException(String msg) Constructs a new

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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