Package org.apache.pinot.segment.local.io.reader.impl

Class FixedByteSingleValueMultiColReader

java.lang.Object

org.apache.pinot.segment.local.io.reader.impl.FixedByteSingleValueMultiColReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class FixedByteSingleValueMultiColReader
extends Object
implements Closeable

Generic utility class to read data from file. The data file consists of rows and columns. The number of columns are fixed. Each column can have either single value or multiple values. There are two basic types of methods to read the data
1. <TYPE> getType(int row, int col) this is used for single value column
2. int getTYPEArray(int row, int col, TYPE[] array). The caller has to create and initialize the array. The implementation will fill up the array. The caller is responsible to ensure that the array is big enough to fit all the values. The return value tells the number of values.

Constructor Summary

Constructors

Constructor	Description
FixedByteSingleValueMultiColReader(PinotDataBuffer dataBuffer, int numRows, int[] columnSizes)

Method Summary

Modifier and Type	Method	Description
void	close()
byte[]	getBytes(int row, int col)	Generic method to read the raw bytes
char	getChar(int row, int col)
int[]	getColumnSizes()
double	getDouble(int row, int col)	Reads the double at row,col
float	getFloat(int row, int col)
int	getInt(int row, int col)
long	getLong(int row, int col)
int	getNumberOfRows()
short	getShort(int row, int col)
String	getString(int row, int col)	Returns the string value, NOTE: It expects all String values in the file to be of same length
boolean	open()
void	readDoubleValues(int[] rows, int col, int startPos, int limit, double[] values, int outStartPos)
void	readFloatValues(int[] rows, int col, int startPos, int limit, float[] values, int outStartPos)
void	readIntValues(int[] rows, int col, int startPos, int limit, int[] values, int outStartPos)
void	readLongValues(int[] rows, int col, int startPos, int limit, long[] values, int outStartPos)
void	readStringValues(int[] rows, int col, int startPos, int limit, String[] values, int outStartPos)

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedByteSingleValueMultiColReader

public FixedByteSingleValueMultiColReader(PinotDataBuffer dataBuffer,
                                          int numRows,
                                          int[] columnSizes)

Method Detail

getChar

public char getChar(int row,
                    int col)

Parameters:

row -

col -

Returns:

getShort

public short getShort(int row,
                      int col)

Parameters:

row -

col -

Returns:

getInt

public int getInt(int row,
                  int col)

Parameters:

row -

col -

Returns:

getLong

public long getLong(int row,
                    int col)

Parameters:

row -

col -

Returns:

getFloat

public float getFloat(int row,
                      int col)

Parameters:

row -

col -

Returns:

getDouble

public double getDouble(int row,
                        int col)

Reads the double at row,col

Parameters:

row -

col -

Returns:

getString

public String getString(int row,
                        int col)

Returns the string value, NOTE: It expects all String values in the file to be of same length

Parameters:

row -

col -

Returns:

getBytes

public byte[] getBytes(int row,
                       int col)

Generic method to read the raw bytes

Parameters:

row -

col -

Returns:

getNumberOfRows

public int getNumberOfRows()

getColumnSizes

public int[] getColumnSizes()

open

public boolean open()

readIntValues

public void readIntValues(int[] rows,
                          int col,
                          int startPos,
                          int limit,
                          int[] values,
                          int outStartPos)

readLongValues

public void readLongValues(int[] rows,
                           int col,
                           int startPos,
                           int limit,
                           long[] values,
                           int outStartPos)

readFloatValues

public void readFloatValues(int[] rows,
                            int col,
                            int startPos,
                            int limit,
                            float[] values,
                            int outStartPos)

readDoubleValues

public void readDoubleValues(int[] rows,
                             int col,
                             int startPos,
                             int limit,
                             double[] values,
                             int outStartPos)

readStringValues

public void readStringValues(int[] rows,
                             int col,
                             int startPos,
                             int limit,
                             String[] values,
                             int outStartPos)

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable