Package org.apache.sysds.runtime.io

Class ListWriter

java.lang.Object

org.apache.sysds.runtime.io.ListWriter

public class ListWriter
extends Object

Constructor Summary

Constructors

Constructor	Description
ListWriter()

Method Summary

Modifier and Type	Method	Description
static void	writeListToHDFS(ListObject lo, String fname, String fmtStr, FileFormatProperties props)	Writes a list object and all contained objects to a folder with related meta data.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListWriter

public ListWriter()

Method Detail

writeListToHDFS

public static void writeListToHDFS(ListObject lo,
                                   String fname,
                                   String fmtStr,
                                   FileFormatProperties props)
                            throws DMLRuntimeException

Writes a list object and all contained objects to a folder with related meta data. The individual objects (including nested lists) are written with existing matrix/frame writers and meta data such that the entire list and separate objects can be read back. By using the existing writers, all formats are naturally supported and we can ensure consistency of the on-disk representation.

Parameters:

lo - list object

fname - directory name

fmtStr - format string

props - file format properties

Throws:

DMLRuntimeException - if write fails