me.prettyprint.cassandra.service
Class ColumnSliceIterator<K,N,V>

java.lang.Object
  me.prettyprint.cassandra.service.ColumnSliceIterator<K,N,V>

All Implemented Interfaces:

Iterator<HColumn<N,V>>

public class ColumnSliceIterator<K,N,V>
extends Object
implements Iterator<HColumn<N,V>>

Iterates over the column slice, refreshing until all qualifing columns are retrieved. If column deletion can occur synchronously with calls to hasNext(), the column name object type must override Object.equals().

Author:

thrykol

Nested Class Summary

static interface

ColumnSliceIterator.ColumnSliceFinish<N> When iterating over a ColumnSlice, it may be desirable to move the finish point for each query.

Constructor Summary

ColumnSliceIterator(SliceQuery<K,N,V> query, N start, ColumnSliceIterator.ColumnSliceFinish<N> finish, boolean reversed)
Constructor

ColumnSliceIterator(SliceQuery<K,N,V> query, N start, ColumnSliceIterator.ColumnSliceFinish<N> finish, boolean reversed, int count)
Constructor

ColumnSliceIterator(SliceQuery<K,N,V> query, N start, N finish, boolean reversed)
Constructor

ColumnSliceIterator(SliceQuery<K,N,V> query, N start, N finish, boolean reversed, int count)
Constructor

Method Summary

boolean	hasNext()
HColumn<N,V>	next()
void	remove()
ColumnSliceIterator	setFilter(SliceFilter<HColumn<N,V>> filter) Set a filter to determine which columns will be returned.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnSliceIterator

public ColumnSliceIterator(SliceQuery<K,N,V> query,
                           N start,
                           N finish,
                           boolean reversed)

Constructor

Parameters:

query - Base SliceQuery to execute

start - Starting point of the range

finish - Finish point of the range.

reversed - Whether or not the columns should be reversed

ColumnSliceIterator

public ColumnSliceIterator(SliceQuery<K,N,V> query,
                           N start,
                           N finish,
                           boolean reversed,
                           int count)

Constructor

Parameters:

query - Base SliceQuery to execute

start - Starting point of the range

finish - Finish point of the range.

reversed - Whether or not the columns should be reversed

count - the amount of columns to retrieve per batch

ColumnSliceIterator

public ColumnSliceIterator(SliceQuery<K,N,V> query,
                           N start,
                           ColumnSliceIterator.ColumnSliceFinish<N> finish,
                           boolean reversed)

Constructor

Parameters:

query - Base SliceQuery to execute

start - Starting point of the range

finish - Finish point of the range. Allows for a dynamically determined point

reversed - Whether or not the columns should be reversed

ColumnSliceIterator

public ColumnSliceIterator(SliceQuery<K,N,V> query,
                           N start,
                           ColumnSliceIterator.ColumnSliceFinish<N> finish,
                           boolean reversed,
                           int count)

Constructor

Parameters:

query - Base SliceQuery to execute

start - Starting point of the range

finish - Finish point of the range. Allows for a dynamically determined point

reversed - Whether or not the columns should be reversed

count - the amount of columns to retrieve per batch

Method Detail

setFilter

public ColumnSliceIterator setFilter(SliceFilter<HColumn<N,V>> filter)

Set a filter to determine which columns will be returned.

Parameters:

filter - Filter to determine which columns will be returned

Returns:

<this>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<HColumn<N,V>>

next

public HColumn<N,V> next()

Specified by:

next in interface Iterator<HColumn<N,V>>

remove

public void remove()

Specified by:

remove in interface Iterator<HColumn<N,V>>