org.apache.sysds.runtime.util

Class FastBufferedDataInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.sysds.runtime.util.FastBufferedDataInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, MatrixBlockDataInput

public class FastBufferedDataInputStream
extends FilterInputStream
implements DataInput, MatrixBlockDataInput

Constructor Summary

Constructors

Constructor and Description
FastBufferedDataInputStream(InputStream in)
FastBufferedDataInputStream(InputStream in, int size)

Method Summary

Modifier and Type	Method and Description
boolean	readBoolean()
byte	readByte()
char	readChar()
double	readDouble()
long	readDoubleArray(int len, double[] varr) Reads the double array from the data input into the given dense block and returns the number of non-zeros.
float	readFloat()
void	readFully(byte[] b)
void	readFully(byte[] b, int off, int len)
int	readInt()
String	readLine()
long	readLong()
short	readShort()
long	readSparseRows(int rlen, long nnz, SparseBlock rows) Reads the sparse rows array from the data input into a sparse block and returns the number of non-zeros.
int	readUnsignedByte()
int	readUnsignedShort()
String	readUTF()
int	skipBytes(int n)

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

FastBufferedDataInputStream

public FastBufferedDataInputStream(InputStream in)

FastBufferedDataInputStream

public FastBufferedDataInputStream(InputStream in,
                                   int size)

Method Detail

readFully

public void readFully(byte[] b)
               throws IOException

Specified by:

readFully in interface DataInput

Throws:

IOException

readFully

public void readFully(byte[] b,
                      int off,
                      int len)
               throws IOException

Specified by:

readFully in interface DataInput

Throws:

IOException

skipBytes

public int skipBytes(int n)
              throws IOException

Specified by:

skipBytes in interface DataInput

Throws:

IOException

readBoolean

public boolean readBoolean()
                    throws IOException

Specified by:

readBoolean in interface DataInput

Throws:

IOException

readByte

public byte readByte()
              throws IOException

Specified by:

readByte in interface DataInput

Throws:

IOException

readUnsignedByte

public int readUnsignedByte()
                     throws IOException

Specified by:

readUnsignedByte in interface DataInput

Throws:

IOException

readShort

public short readShort()
                throws IOException

Specified by:

readShort in interface DataInput

Throws:

IOException

readUnsignedShort

public int readUnsignedShort()
                      throws IOException

Specified by:

readUnsignedShort in interface DataInput

Throws:

IOException

readChar

public char readChar()
              throws IOException

Specified by:

readChar in interface DataInput

Throws:

IOException

readInt

public int readInt()
            throws IOException

Specified by:

readInt in interface DataInput

Throws:

IOException

readLong

public long readLong()
              throws IOException

Specified by:

readLong in interface DataInput

Throws:

IOException

readFloat

public float readFloat()
                throws IOException

Specified by:

readFloat in interface DataInput

Throws:

IOException

readDouble

public double readDouble()
                  throws IOException

Specified by:

readDouble in interface DataInput

Throws:

IOException

readLine

public String readLine()
                throws IOException

Specified by:

readLine in interface DataInput

Throws:

IOException

readUTF

public String readUTF()
               throws IOException

Specified by:

readUTF in interface DataInput

Throws:

IOException

readDoubleArray

public long readDoubleArray(int len,
                            double[] varr)
                     throws IOException

Description copied from interface: MatrixBlockDataInput

Reads the double array from the data input into the given dense block and returns the number of non-zeros.

Specified by:

readDoubleArray in interface MatrixBlockDataInput

Parameters:

len - ?

varr - ?

Returns:

number of non-zeros

Throws:

IOException - if IOException occurs

readSparseRows

public long readSparseRows(int rlen,
                           long nnz,
                           SparseBlock rows)
                    throws IOException

Description copied from interface: MatrixBlockDataInput

Reads the sparse rows array from the data input into a sparse block and returns the number of non-zeros.

Specified by:

readSparseRows in interface MatrixBlockDataInput

Parameters:

rlen - number of rows

nnz - number of non-zeros

rows - sparse block

Returns:

number of non-zeros

Throws:

IOException - if IOExcepton occurs