Package org.apache.sysds.runtime.frame.data.iterators

Interface IteratorFactory

public interface IteratorFactory

Factory pattern for construction of rowIterators of the FrameBlock.

Method Summary

Static Methods

Modifier and Type	Method	Description
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb)	Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, int colID)	Get a row iterator over the frame where all selected fields are encoded as objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, int[] cols)	Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, int rl, int ru)	Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, int rl, int ru, int colID)	Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, int rl, int ru, int[] cols)	Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.
static RowIterator<Object>	getObjectRowIterator(FrameBlock fb, Types.ValueType[] schema)	Get a row iterator over the frame where all fields are encoded as boxed objects according to the value types of the provided target schema.
static RowIterator<String>	getStringRowIterator(FrameBlock fb)	Get a row iterator over the frame where all fields are encoded as strings independent of their value types.
static RowIterator<String>	getStringRowIterator(FrameBlock fb, int colID)	Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
static RowIterator<String>	getStringRowIterator(FrameBlock fb, int[] cols)	Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
static RowIterator<String>	getStringRowIterator(FrameBlock fb, int rl, int ru)	Get a row iterator over the frame where all fields are encoded as strings independent of their value types.
static RowIterator<String>	getStringRowIterator(FrameBlock fb, int rl, int ru, int colID)	Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.
static RowIterator<String>	getStringRowIterator(FrameBlock fb, int rl, int ru, int[] cols)	Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.

Method Detail

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb)

Get a row iterator over the frame where all fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

Returns:

string array iterator

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb,
                                                int[] cols)

Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

cols - column selection, 1-based

Returns:

string array iterator

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb,
                                                int colID)

Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

colID - column selection, 1-based

Returns:

string array iterator

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru)

Get a row iterator over the frame where all fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

Returns:

string array iterator

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru,
                                                int[] cols)

Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

cols - column selection, 1-based

Returns:

string array iterator

getStringRowIterator

static RowIterator<String> getStringRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru,
                                                int colID)

Get a row iterator over the frame where all selected fields are encoded as strings independent of their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

colID - columnID, 1-based

Returns:

string array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb)

Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.

Parameters:

fb - The frame to iterate through

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                Types.ValueType[] schema)

Get a row iterator over the frame where all fields are encoded as boxed objects according to the value types of the provided target schema.

Parameters:

fb - The frame to iterate through

schema - target schema of objects

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                int[] cols)

Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.

Parameters:

fb - The frame to iterate through

cols - column selection, 1-based

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                int colID)

Get a row iterator over the frame where all selected fields are encoded as objects according to their value types.

Parameters:

fb - The frame to iterate through

colID - column selection, 1-based

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru)

Get a row iterator over the frame where all fields are encoded as boxed objects according to their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru,
                                                int[] cols)

Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

cols - column selection, 1-based

Returns:

object array iterator

getObjectRowIterator

static RowIterator<Object> getObjectRowIterator(FrameBlock fb,
                                                int rl,
                                                int ru,
                                                int colID)

Get a row iterator over the frame where all selected fields are encoded as boxed objects according to their value types.

Parameters:

fb - The frame to iterate through

rl - lower row index

ru - upper row index

colID - column selection, 1-based

Returns:

object array iterator