Package tech.tablesaw.columns.strings

Class TextColumnType

java.lang.Object

tech.tablesaw.columns.AbstractColumnType

tech.tablesaw.columns.strings.TextColumnType

All Implemented Interfaces:

ColumnType

public class TextColumnType
extends AbstractColumnType

A ColumnType for columns that holds String values.

It is optimized for situations where the values in the column rarely if ever repeat, so the dictionary encoding performed by StringColumn would be detrimental to memory usage.

See also: StringColumn

Field Summary

Fields

Modifier and Type	Field	Description
static int	BYTE_SIZE
static StringParser	DEFAULT_PARSER

Fields inherited from interface tech.tablesaw.api.ColumnType

BOOLEAN, DOUBLE, FLOAT, INSTANT, INTEGER, LOCAL_DATE, LOCAL_DATE_TIME, LOCAL_TIME, LONG, SHORT, SKIP, STRING, TEXT, values

Method Summary

Modifier and Type	Method	Description
TextColumn	create(String name)	Returns a column of this type with the given name
StringParser	customParser(ReadOptions options)	TODO: Research this method to provide a good comment
static TextColumnType	instance()
static String	missingValueIndicator()
static boolean	valueIsMissing(String string)

Methods inherited from class tech.tablesaw.columns.AbstractColumnType

byteSize, equals, getPrinterFriendlyName, hashCode, name, toString

Methods inherited from interface tech.tablesaw.api.ColumnType

compare, compare, register, valueOf, values

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

BYTE_SIZE

public static final int BYTE_SIZE

See Also:

Constant Field Values

DEFAULT_PARSER

public static final StringParser DEFAULT_PARSER

Method Detail

instance

public static TextColumnType instance()

valueIsMissing

public static boolean valueIsMissing(String string)

create

public TextColumn create(String name)

Description copied from interface: ColumnType

Returns a column of this type with the given name

customParser

public StringParser customParser(ReadOptions options)

Description copied from interface: ColumnType

TODO: Research this method to provide a good comment

missingValueIndicator

public static String missingValueIndicator()