org.apache.openjpa.kernel
Interface Seq

All Superinterfaces:

Closeable

All Known Subinterfaces:

JDBCSeq

All Known Implementing Classes:

AbstractJDBCSeq, ClassTableJDBCSeq, DelegatingSeq, NativeJDBCSeq, TableJDBCSeq, TimeSeededSeq, UUIDHexSeq, UUIDStringSeq, ValueTableJDBCSeq

public interface Seq
extends Closeable

Internal OpenJPA sequence interface.

Author:

Abe White

Field Summary

static int	TYPE_CONTIGUOUS
static int	TYPE_DEFAULT
static int	TYPE_NONTRANSACTIONAL
static int	TYPE_TRANSACTIONAL

Method Summary

void	allocate(int additional, StoreContext ctx, ClassMetaData cls) Allocate additional values efficiently.
void	close() Free resources used by this sequence.
Object	current(StoreContext ctx, ClassMetaData cls) Return the current value of the sequence, or null if not available.
Object	next(StoreContext ctx, ClassMetaData cls) Return the next value in the sequence.
void	setType(int type) Set the type of sequence.

Field Detail

TYPE_DEFAULT

static final int TYPE_DEFAULT

See Also:

Constant Field Values

TYPE_NONTRANSACTIONAL

static final int TYPE_NONTRANSACTIONAL

See Also:

Constant Field Values

TYPE_TRANSACTIONAL

static final int TYPE_TRANSACTIONAL

See Also:

Constant Field Values

TYPE_CONTIGUOUS

static final int TYPE_CONTIGUOUS

See Also:

Constant Field Values

Method Detail

setType

void setType(int type)

Set the type of sequence.

next

Object next(StoreContext ctx,
            ClassMetaData cls)

Return the next value in the sequence.

Parameters:

ctx - the current context

cls - if this is a datastore identity sequence, the persistent class the identity value is for; else null

current

Object current(StoreContext ctx,
               ClassMetaData cls)

Return the current value of the sequence, or null if not available.

Parameters:

ctx - the current context

cls - if this is a datastore identity sequence, the persistent class the identity value is for; else null

allocate

void allocate(int additional,
              StoreContext ctx,
              ClassMetaData cls)

Allocate additional values efficiently.

Parameters:

ctx - the current context

cls - if this is a datastore identity sequence, the persistent class the identity value is for; else null

close

void close()

Free resources used by this sequence.

Specified by:

close in interface Closeable