net.obsearch.storage.bdb
Class AbstractBDBOBStoreJe.CursorIterator<T>

java.lang.Object
  net.obsearch.storage.bdb.AbstractBDBOBStoreJe.CursorIterator<T>

Type Parameters:

O - The type of tuple that will be returned by the iterator.

All Implemented Interfaces:

Iterator<T>, CloseIterator<T>

Direct Known Subclasses:

AbstractBDBOBStoreJe.ByteArrayIterator

Enclosing class:

AbstractBDBOBStoreJe<T extends Tuple>

protected abstract class AbstractBDBOBStoreJe.CursorIterator<T>
extends Object
implements CloseIterator<T>

Base class used to iterate over cursors.

Field Summary

protected com.sleepycat.je.Cursor	cursor
protected com.sleepycat.je.DatabaseEntry	dataEntry
protected com.sleepycat.je.DatabaseEntry	keyEntry
protected com.sleepycat.je.DatabaseEntry	prevDataEntry Previous data entry
protected com.sleepycat.je.DatabaseEntry	prevKeyEntry Previous key entry
protected com.sleepycat.je.OperationStatus	retVal

Constructor Summary

protected	AbstractBDBOBStoreJe.CursorIterator() Creates a cursor iterator in full mode.
	AbstractBDBOBStoreJe.CursorIterator(byte[] min, byte[] max)
protected	AbstractBDBOBStoreJe.CursorIterator(byte[] min, byte[] max, boolean full, boolean backwards, boolean dups)

Method Summary

void	closeCursor()
protected T	createT(byte[] key, byte[] value)
protected abstract T	createTuple(byte[] key, byte[] value) Creates a tuple from the given key and value.
boolean	hasNext()
T	next()
void	remove()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cursor

protected com.sleepycat.je.Cursor cursor

keyEntry

protected com.sleepycat.je.DatabaseEntry keyEntry

dataEntry

protected com.sleepycat.je.DatabaseEntry dataEntry

prevKeyEntry

protected com.sleepycat.je.DatabaseEntry prevKeyEntry

Previous key entry

prevDataEntry

protected com.sleepycat.je.DatabaseEntry prevDataEntry

Previous data entry

retVal

protected com.sleepycat.je.OperationStatus retVal

Constructor Detail

AbstractBDBOBStoreJe.CursorIterator

protected AbstractBDBOBStoreJe.CursorIterator()
                                       throws OBStorageException

Creates a cursor iterator in full mode.

Throws:

OBStorageException

AbstractBDBOBStoreJe.CursorIterator

public AbstractBDBOBStoreJe.CursorIterator(byte[] min,
                                           byte[] max)
                                    throws OBStorageException

Throws:

OBStorageException

AbstractBDBOBStoreJe.CursorIterator

protected AbstractBDBOBStoreJe.CursorIterator(byte[] min,
                                              byte[] max,
                                              boolean full,
                                              boolean backwards,
                                              boolean dups)
                                       throws OBStorageException

Throws:

OBStorageException

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

createT

protected T createT(byte[] key,
                    byte[] value)

createTuple

protected abstract T createTuple(byte[] key,
                                 byte[] value)

Creates a tuple from the given key and value.

Parameters:

key - raw key.

value - raw value.

Returns:

A new tuple of type T created from the raw data key and value.

next

public T next()

Specified by:

next in interface Iterator<T>

closeCursor

public void closeCursor()
                 throws OBException

Specified by:

closeCursor in interface CloseIterator<T>

Throws:

OBException

remove

public void remove()

Specified by:

remove in interface Iterator<T>