Package org.apache.sysds.runtime.io

Class WriterTextCSV

java.lang.Object

org.apache.sysds.runtime.io.MatrixWriter

org.apache.sysds.runtime.io.WriterTextCSV

Direct Known Subclasses:

WriterTextCSVParallel

public class WriterTextCSV
extends MatrixWriter

Field Summary

Fields

Modifier and Type	Field	Description
static int	BLOCKSIZE_J

Constructor Summary

Constructors

Constructor	Description
WriterTextCSV(FileFormatPropertiesCSV props)

Method Summary

Modifier and Type	Method	Description
void	addHeaderToCSV(String srcFileName, String destFileName, long rlen, long clen)
void	writeEmptyMatrixToHDFS(String fname, long rlen, long clen, int blen)	Writes a minimal entry to represent an empty matrix on hdfs.
void	writeMatrixToHDFS(MatrixBlock src, String fname, long rlen, long clen, int blen, long nnz, boolean diag)

Methods inherited from class org.apache.sysds.runtime.io.MatrixWriter

createMatrixBlocksForReuse, getMatrixBlockForReuse, writeMatrixToHDFS

Methods inherited from class java.lang.Object

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

Field Detail

BLOCKSIZE_J

public static final int BLOCKSIZE_J

See Also:

Constant Field Values

Constructor Detail

WriterTextCSV

public WriterTextCSV(FileFormatPropertiesCSV props)

Method Detail

writeMatrixToHDFS

public final void writeMatrixToHDFS(MatrixBlock src,
                                    String fname,
                                    long rlen,
                                    long clen,
                                    int blen,
                                    long nnz,
                                    boolean diag)
                             throws IOException,
                                    DMLRuntimeException

Specified by:

writeMatrixToHDFS in class MatrixWriter

Throws:

IOException

DMLRuntimeException

writeEmptyMatrixToHDFS

public final void writeEmptyMatrixToHDFS(String fname,
                                         long rlen,
                                         long clen,
                                         int blen)
                                  throws IOException,
                                         DMLRuntimeException

Description copied from class: MatrixWriter

Writes a minimal entry to represent an empty matrix on hdfs.

Specified by:

writeEmptyMatrixToHDFS in class MatrixWriter

Parameters:

fname - file name

rlen - number of rows

clen - number of columns

blen - number of rows/cols in block

Throws:

IOException - if IOException occurs

DMLRuntimeException

addHeaderToCSV

public final void addHeaderToCSV(String srcFileName,
                                 String destFileName,
                                 long rlen,
                                 long clen)
                          throws IOException

Throws:

IOException