FastBufferedDataInputStream (Apache SystemDS 3.0.0 API)
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Package 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
Description
FastBufferedDataInputStream​(InputStream in)
 
FastBufferedDataInputStream​(InputStream in,
int size)
 
Method Summary
All Methods Instance Methods Concrete Methods 
Modifier and Type
Method
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.io.InputStream
nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo
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
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