de.caluga.morphium.query

Interface MorphiumIterator<T>

All Superinterfaces:

Iterable<T>, Iterator<T>

All Known Implementing Classes:

MorphiumIteratorImpl

public interface MorphiumIterator<T>
extends Iterable<T>, Iterator<T>

User: Stephan Bösebeck Date: 23.11.12 Time: 11:35

iterator, makes paging through huge collections a lot easier. Default Window (~page) size is 10.

This iterator only reads as many objects from mongo as specified in window-size. It can be used like a normal java iterator: for (Object o:query.asIterable()) { //do something here };

Method Summary

Methods

Modifier and Type	Method and Description
void	ahead(int jump) move the cursor position ahead
void	back(int jump) get back some positions
long	getCount() how many elements are to be processed.
List<T>	getCurrentBuffer() get the current buffer.
int	getCurrentBufferSize() retruns the number of elements now in buffer.
int	getCursor() returns current cursor position
Query<T>	getQuery()
int	getWindowSize()
void	setQuery(Query<T> q)
void	setWindowSize(int sz)

Methods inherited from interface java.lang.Iterable

iterator

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Method Detail

setWindowSize

void setWindowSize(int sz)

getWindowSize

int getWindowSize()

setQuery

void setQuery(Query<T> q)

getQuery

Query<T> getQuery()

getCurrentBufferSize

int getCurrentBufferSize()

retruns the number of elements now in buffer. Max windowsize

Returns:

getCurrentBuffer

List<T> getCurrentBuffer()

get the current buffer. Maximum length is specified windowsize

Returns:

getCount

long getCount()

how many elements are to be processed. Attention: this count is not updated. It shows how many elements are there at the beginning of the interation!

Returns:

getCursor

int getCursor()

returns current cursor position

Returns:

ahead

void ahead(int jump)

move the cursor position ahead

Parameters:

jump -

back

void back(int jump)

get back some positions

Parameters:

jump -