Package org.apache.sysds.runtime.io

Class ListReader

java.lang.Object

org.apache.sysds.runtime.io.ListReader

public class ListReader
extends Object

Constructor Summary

Constructors

Constructor	Description
ListReader()

Method Summary

Modifier and Type	Method	Description
static ListObject	readListFromHDFS(String fname, String fmtStr, FileFormatProperties props)	Reads a list object and all contained objects from a folder with related meta data.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListReader

public ListReader()

Method Detail

readListFromHDFS

public static ListObject readListFromHDFS(String fname,
                                          String fmtStr,
                                          FileFormatProperties props)
                                   throws DMLRuntimeException

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

Parameters:

fname - directory name

fmtStr - format string

props - file format properties

Returns:

list object

Throws:

DMLRuntimeException - if inconsistent meta data or read fails