com.bigdata.btree

Class AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor<E>

java.lang.Object

com.bigdata.btree.AbstractBTreeTupleCursor<BTree,Leaf,E>

com.bigdata.btree.AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor<E>

Type Parameters:

E -

All Implemented Interfaces:

ITupleCursor<E>, ITupleCursor2<E>, ITupleIterator<E>, Iterator<ITuple<E>>

Direct Known Subclasses:

AbstractBTreeTupleCursor.MutableBTreeTupleCursor

Enclosing class:

AbstractBTreeTupleCursor<I extends AbstractBTree,L extends Leaf,E>

public static class AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor<E>
extends AbstractBTreeTupleCursor<BTree,Leaf,E>

An ITuple that directly supports forward and reverse cursor operations on a local BTree.

Version:

$Id$

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.btree.AbstractBTreeTupleCursor

AbstractBTreeTupleCursor.MutableBTreeTupleCursor<E>, AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor<E>

Field Summary

Fields inherited from class com.bigdata.btree.AbstractBTreeTupleCursor

btree, currentPosition, DEBUG, fromKey, INFO, log, toKey, tuple, visitDeleted

Constructor Summary

Constructors

Constructor and Description
AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor(BTree btree, Tuple<E> tuple, byte[] fromKey, byte[] toKey)

Method Summary

Methods

Modifier and Type	Method and Description
protected com.bigdata.btree.AbstractBTreeTupleCursor.ReadOnlyCursorPosition<E>	newPosition(ILeafCursor<Leaf> leafCursor, int index, byte[] key) Return a new ICursorPosition from the leafCursor, tuple index, and key
protected com.bigdata.btree.AbstractBTreeTupleCursor.ReadOnlyCursorPosition<E>	newTemporaryPosition(com.bigdata.btree.AbstractBTreeTupleCursor.ICursorPosition<Leaf,E> p) Return a clone of the given ICursorPosition designed for use by AbstractBTreeTupleCursor.hasNext() and AbstractBTreeTupleCursor.hasPrior() (temporary test without side-effects).

Methods inherited from class com.bigdata.btree.AbstractBTreeTupleCursor

assertCursorPositionDefined, currentKey, first, firstPosition, getExclusiveUpperBound, getFromKey, getInclusiveLowerBound, getIndex, getToKey, hasNext, hasPrior, isCursorPositionDefined, isDeletedTupleVisitor, last, lastPosition, newPosition, next, nextTuple, prior, priorTuple, rangeCheck, remove, seek, seek, toString, tuple

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor

public AbstractBTreeTupleCursor.ReadOnlyBTreeTupleCursor(BTree btree,
                                                 Tuple<E> tuple,
                                                 byte[] fromKey,
                                                 byte[] toKey)

Method Detail

newPosition

protected com.bigdata.btree.AbstractBTreeTupleCursor.ReadOnlyCursorPosition<E> newPosition(ILeafCursor<Leaf> leafCursor,
                                                                               int index,
                                                                               byte[] key)

Description copied from class: AbstractBTreeTupleCursor

Return a new ICursorPosition from the leafCursor, tuple index, and key

Specified by:

newPosition in class AbstractBTreeTupleCursor<BTree,Leaf,E>

Parameters:

leafCursor - The ILeafCursor (already positioned on the desired leaf).

index - The index of the tuple corresponding to the key within the current leaf of the leafCursor -or- a negative integer representing the insertion point for the key if the key is spanned by that leaf but there is no tuple for that key in the leaf.

key - The key.

Returns:

The new ICursorPosition.

newTemporaryPosition

protected com.bigdata.btree.AbstractBTreeTupleCursor.ReadOnlyCursorPosition<E> newTemporaryPosition(com.bigdata.btree.AbstractBTreeTupleCursor.ICursorPosition<Leaf,E> p)

Description copied from class: AbstractBTreeTupleCursor

Return a clone of the given ICursorPosition designed for use by AbstractBTreeTupleCursor.hasNext() and AbstractBTreeTupleCursor.hasPrior() (temporary test without side-effects).

Specified by:

newTemporaryPosition in class AbstractBTreeTupleCursor<BTree,Leaf,E>

Parameters:

p - The cursor position.

Returns:

A clone of that cursor position.