net.obsearch.storage.tc
Class AbstractTCOBStorage.CursorIterator<T>

java.lang.Object
  net.obsearch.storage.tc.AbstractTCOBStorage.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:

AbstractTCOBStorage.ByteArrayIterator, AbstractTCOBStorage.ByteArrayKeyIterator

Enclosing class:

AbstractTCOBStorage<T extends Tuple>

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

Base class used to iterate over cursors. Only supports full search

Field Summary

protected byte[]	lastReturnedKey
protected byte[]	nextKey
protected byte[]	nextValue

Constructor Summary

protected

AbstractTCOBStorage.CursorIterator()

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()
protected void	loadNext() Loads data from keyEntry and dataEntry and puts it into next.
T	next()
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

nextKey

protected byte[] nextKey

nextValue

protected byte[] nextValue

lastReturnedKey

protected byte[] lastReturnedKey

Constructor Detail

AbstractTCOBStorage.CursorIterator

protected AbstractTCOBStorage.CursorIterator()
                                      throws OBStorageException

Throws:

OBStorageException

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<T>

loadNext

protected void loadNext()
                 throws NoSuchElementException

Loads data from keyEntry and dataEntry and puts it into next. If we go beyond max, we set next to null so that everybody will work properly.

Throws:

NoSuchElementException

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>