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7

JPA Named Queries

" that retrieves all the Country objects in the database: @NamedQuery(name="Country.findAll", query
7

javax.persistence.Query

to retrieve. The position of the first result the query object was set to retrieve. Returns 0 ... object was set to retrieve. The maximum number of results the query object was set to retrieve. Returns ... startPosition) Set the position of the first result to retrieve. Set the position of the first result
5

java.lang.Exception

is saved for later retrieval by the getMessage() method. Since: Java JDK1.0 Exception(Throwable cause ... .PrivilegedActionException). Parameters: cause - the cause (which is saved for later retrieval by the getCause ... detail message. Parameters: message - the detail message (which is saved for later retrieval by
5

java.lang.Throwable

: message - the detail message. The detail message is saved for later retrieval by the getMessage ... - the cause (which is saved for later retrieval by the getCause() method). (A null value is permitted ... : message - the detail message (which is saved for later retrieval by the getMessage() method). cause
1

Step 3: Add a Context Listener Class

starts (contextInitialized). Retrieves the EntityManagerFactory from the application scope attribute
0

javax.jdo.spi.PersistenceCapable.ObjectIdFieldManager

one field into the field manager. This field was retrieved from the field of the ObjectId. Parameters ... . Store one field into the field manager. This field was retrieved from the field of the ObjectId ... the field manager. Store one field into the field manager. This field was retrieved from the field
0

javax.jdo.spi.PersistenceCapable.ObjectIdFieldConsumer

. This field was retrieved from the field of the ObjectId. Parameters: fieldNumber - the field number ... manager. This field was retrieved from the field of the ObjectId. Parameters: fieldNumber - the field ... the field manager. This field was retrieved from the field of the ObjectId. Parameters: fieldNumber
0

retrieveAll(useFetchPlan, pcs)

) Retrieve field values of instances from the store. This tells the PersistenceManager that the application intends to use the instances, and their field values should be retrieved. The fields in the current fetch group must be retrieved, and the implementation might retrieve more fields than the current
0

retrieveAll(pcs, useFetchPlan)

Method javax.jdo.PersistenceManager void retrieveAll( Object[] pcs, boolean useFetchPlan ) Retrieve ... intends to use the instances, and their field values should be retrieved. The fields in the current fetch group must be retrieved, and the implementation might retrieve more fields than the current
0

retrieveAll(pcs, useFetchPlan)

) Retrieve field values of instances from the store. This tells the PersistenceManager that the application intends to use the instances, and their field values should be retrieved. The fields in the current fetch group must be retrieved, and the implementation might retrieve more fields than the current

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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