Class TabDataFile

java.lang.Object
  |
  +--DataSource
        |
        +--TabDataSource
              |
              +--TabDataFile

public class TabDataFile

extends TabDataSource

implements Constants

Datafile implementation

Fields inherited from interface Constants

DEBUG, T_BOOLEAN, T_CLASS, T_DOUBLE, T_INTEGER, T_SELECT, T_UNSELECT

Constructor Summary

TabDataFile()

Method Summary

void	close() closes datafile
boolean	fetchFirst() Reads first line (row) from datafile
boolean	fetchNext() Reads next line (row) from datafile.
boolean	getColAsBoolean(int ix)
int	getColAsClass(int ix)
java.lang.String	getColAsClassString(int ix)
double	getColAsDouble(int ix)
int	getColAsInt(int ix)
long	getColAsLong(int ix)
java.lang.String	getColAsString(int ix)
java.lang.String	getColumnMeasurement(int ix)
java.lang.String	getColumnName(int ix)
int	getColumnType(int ix)
java.lang.String	getFileDesc()
int	getNumberOfClasses(int ix)
int	getNumberOfCols()
int	getNumberOfRows()
java.lang.String	getValueOfClass(int ix, int n)
void	open() Opens datafile and reads header
boolean	setFilename(java.lang.String filename) Sets filename for following open() -method

Methods inherited from class java.lang.Object

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

Constructor Detail

TabDataFile

public TabDataFile()

Method Detail

setFilename

public boolean setFilename(java.lang.String filename)

Sets filename for following open() -method

Parameters:

Complete - filename of datafile

Returns:

true if filename set successfully

open

public void open()
          throws java.io.IOException

Opens datafile and reads header

close

public void close()
           throws java.io.IOException

closes datafile

getFileDesc

public java.lang.String getFileDesc()

Returns:

Description of datafile.

getNumberOfRows

public int getNumberOfRows()

Returns:

Number of rows in datafile.

getNumberOfCols

public int getNumberOfCols()

Returns:

Number of columns in datafile.

getColumnName

public java.lang.String getColumnName(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Name of attribute

getColumnType

public int getColumnType(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Type of attribute (0==integer,1==double,2==class)

fetchFirst

public boolean fetchFirst()
                   throws java.io.IOException

Reads first line (row) from datafile

fetchNext

public boolean fetchNext()
                  throws java.io.IOException

Reads next line (row) from datafile.

getColumnMeasurement

public java.lang.String getColumnMeasurement(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Unit of measurement of attribute (if available)

getNumberOfClasses

public int getNumberOfClasses(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Number of classes in classified attribute (0==not classified)

getValueOfClass

public java.lang.String getValueOfClass(int ix,
                                        int n)

Parameters:

ix - Index to attribute-table.

n - Index to to list of class-descriptions in attribute-table

Returns:

Name of class in a classified-attribute

getColAsClassString

public java.lang.String getColAsClassString(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of class-attribute as String

getColAsString

public java.lang.String getColAsString(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of attribute as in datafile without type-conversion

getColAsInt

public int getColAsInt(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of attribute as integer

getColAsBoolean

public boolean getColAsBoolean(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of attribute as integer

getColAsLong

public long getColAsLong(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of attribute as long integer

getColAsClass

public int getColAsClass(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of classified attribute as integer

getColAsDouble

public double getColAsDouble(int ix)

Parameters:

ix - Index to attribute-table

Returns:

Value of attribute as double