javax.jdo.datastore.Sequence - JDO interface
javax.jdo.datastore
Interface Sequence
Implementations of this interface can be used to obtain sequences. The behavior with regard to the transaction and rollover behavior are defined in the metadata.
- Since:
- JDO 2.0
void allocate(int additional)
Provides a hint to the implementation that the application will need
additional sequence value objects in short order. There is no externally visible behavior of this method. It is used to potentially improve the efficiency of the algorithm of obtaining additional sequence value objects. - Parameters:
-
additional- the number of additional values to allocate
- Since:
- JDO 2.0
Object current()
Returns the current sequence value object if it is available. It is intended to return a sequence value object previously used. If the current sequence value is not available, throw JDODataStoreException.
- Returns:
- the current value
- Since:
- JDO 2.0
long currentValue()
Returns the current sequence value as a long. If the current sequence value is not available or is not numeric, throw JDODataStoreException.
- Returns:
- the current value
- Since:
- JDO 2.0
String getName()
Returns the fully qualified name of the
Sequence. - Returns:
- the name of the sequence
- Since:
- JDO 2.0
Object next()
Returns the next sequence value as an Object. If the next sequence value is not available, throw JDODataStoreException.
- Returns:
- the next value
- Since:
- JDO 2.0
long nextValue()
Returns the next sequence value as a long. If the next sequence value is not available or is not numeric, throw JDODataStoreException.
- Returns:
- the next value
- Since:
- JDO 2.0
