AbstractColumn (tablesaw-core 0.34.2 API)

java.lang.Object
- tech.tablesaw.columns.AbstractColumn<T>

All Implemented Interfaces:

Iterable<T>, Comparator<T>, Column<T>

Direct Known Subclasses:

BooleanColumn, DateColumn, DateTimeColumn, InstantColumn, NumberColumn, StringColumn, TextColumn, TimeColumn
```
public abstract class AbstractColumn<T>
extends Object
implements Column<T>
```
Partial implementation of the Column interface

Field Summary

Fields
Modifier and Type Field and Description

static int DEFAULT_ARRAY_SIZE

Fields
Modifier and Type	Field and Description
`static int`	`DEFAULT_ARRAY_SIZE`

Constructor Summary

Constructors
Constructor and Description

AbstractColumn(ColumnType type, String name)

Constructors
Constructor and Description
`AbstractColumn(ColumnType type, String name)`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`StringColumn`	`asStringColumn()`
`abstract Column<T>`	`emptyCopy()` Returns a copy of the receiver with no data.
`BooleanColumn`	`mapToBooleanColumn(String name, Function<? super T,? extends Boolean> function)` Maps the function across all rows, appending the results to a new BooleanColumn.
`DateColumn`	`mapToDateColumn(String name, Function<? super T,? extends LocalDate> function)` Maps the function across all rows, appending the results to a new DateColumn.
`DateTimeColumn`	`mapToDateTimeColumn(String name, Function<? super T,? extends LocalDateTime> function)` Maps the function across all rows, appending the results to a new DateTimeColumn.
`DoubleColumn`	`mapToDoubleColumn(String name, Function<? super T,? extends Double> function)` Maps the function across all rows, appending the results to a new DoubleColumn.
`FloatColumn`	`mapToFloatColumn(String name, Function<? super T,? extends Float> function)` Maps the function across all rows, appending the results to a new FloatColumn.
`InstantColumn`	`mapToInstantColumn(String name, Function<? super T,? extends Instant> function)` Maps the function across all rows, appending the results to a new InstantColumn.
`IntColumn`	`mapToIntColumn(String name, Function<? super T,? extends Integer> function)` Maps the function across all rows, appending the results to a new IntColumn.
`LongColumn`	`mapToLongColumn(String name, Function<? super T,? extends Long> function)` Maps the function across all rows, appending the results to a new LongColumn.
`ShortColumn`	`mapToShortColumn(String name, Function<? super T,? extends Short> function)` Maps the function across all rows, appending the results to a new ShortColumn.
`StringColumn`	`mapToStringColumn(String name, Function<? super T,? extends String> function)` Maps the function across all rows, appending the results to a new StringColumn.
`TextColumn`	`mapToTextColumn(String name, Function<? super T,? extends String> function)` Maps the function across all rows, appending the results to a new TextColumn.
`TimeColumn`	`mapToTimeColumn(String name, Function<? super T,? extends LocalTime> function)` Maps the function across all rows, appending the results to a new TimeColumn.
`String`	`name()` Returns the column's name.
`Column<T>`	`setName(String name)` Sets the columns name to the given string
`String`	`toString()`
`ColumnType`	`type()` Returns this column's ColumnType

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface tech.tablesaw.columns.Column
allMatch, anyMatch, append, append, append, appendCell, appendCell, appendMissing, appendObj, asBytes, asList, asObjectArray, byteSize, clear, columnWidth, contains, copy, count, count, countMissing, countUnique, emptyCopy, filter, first, get, getString, getUnformattedString, inRange, isEmpty, isMissing, isMissing, isNotMissing, lag, last, lead, map, mapInto, max, max, min, min, noneMatch, print, reduce, reduce, removeMissing, rolling, rowComparator, sampleN, sampleX, set, set, set, set, set, setMissing, size, sortAscending, sortDescending, sorted, subset, summary, title, unique, where

Methods inherited from interface java.lang.Iterable
forEach, iterator, spliterator

Methods inherited from interface java.util.Comparator
compare, comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Field Detail
  - DEFAULT_ARRAY_SIZE
```
public static final int DEFAULT_ARRAY_SIZE
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - AbstractColumn
```
public AbstractColumn(ColumnType type,
                      String name)
```
- Method Detail
  - name
```
public String name()
```
    Description copied from interface: Column
    
    Returns the column's name.
    
    Specified by:
    
    name in interface Column<T>
    
    Returns:
    
    name as String
  - setName
```
public Column<T> setName(String name)
```
    Description copied from interface: Column
    
    Sets the columns name to the given string
    
    Specified by:
    
    setName in interface Column<T>
    
    Parameters:
    
    name - The new name MUST be unique for any table containing this column
    
    Returns:
    
    this Column to allow method chaining
  - type
```
public ColumnType type()
```
    Description copied from interface: Column
    
    Returns this column's ColumnType
    
    Specified by:
    
    type in interface Column<T>
    
    Returns:
    
    ColumnType
  - emptyCopy
```
public abstract Column<T> emptyCopy()
```
    Description copied from interface: Column
    
    Returns a copy of the receiver with no data. The column name and type are the same.
    
    Specified by:
    
    emptyCopy in interface Column<T>
    
    Returns:
    
    a empty copy of Column
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - asStringColumn
```
public StringColumn asStringColumn()
```
    Specified by:
    
    asStringColumn in interface Column<T>
  - mapToBooleanColumn
```
public BooleanColumn mapToBooleanColumn(String name,
                                        Function<? super T,? extends Boolean> function)
```
    Maps the function across all rows, appending the results to a new BooleanColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into BooleanColumn.
    
    Returns:
    
    BooleanColumn with the results appended.
  - mapToDateColumn
```
public DateColumn mapToDateColumn(String name,
                                  Function<? super T,? extends LocalDate> function)
```
    Maps the function across all rows, appending the results to a new DateColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into DateColumn.
    
    Returns:
    
    DateColumn with the results appended.
  - mapToDateTimeColumn
```
public DateTimeColumn mapToDateTimeColumn(String name,
                                          Function<? super T,? extends LocalDateTime> function)
```
    Maps the function across all rows, appending the results to a new DateTimeColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into DateTimeColumn.
    
    Returns:
    
    DateTimeColumn with the results appended.
  - mapToDoubleColumn
```
public DoubleColumn mapToDoubleColumn(String name,
                                      Function<? super T,? extends Double> function)
```
    Maps the function across all rows, appending the results to a new DoubleColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into DoubleColumn.
    
    Returns:
    
    DoubleColumn with the results appended.
  - mapToFloatColumn
```
public FloatColumn mapToFloatColumn(String name,
                                    Function<? super T,? extends Float> function)
```
    Maps the function across all rows, appending the results to a new FloatColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into FloatColumn.
    
    Returns:
    
    FloatColumn with the results appended.
  - mapToInstantColumn
```
public InstantColumn mapToInstantColumn(String name,
                                        Function<? super T,? extends Instant> function)
```
    Maps the function across all rows, appending the results to a new InstantColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into InstantColumn.
    
    Returns:
    
    InstantColumn with the results appended.
  - mapToIntColumn
```
public IntColumn mapToIntColumn(String name,
                                Function<? super T,? extends Integer> function)
```
    Maps the function across all rows, appending the results to a new IntColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into IntColumn.
    
    Returns:
    
    IntColumn with the results appended.
  - mapToLongColumn
```
public LongColumn mapToLongColumn(String name,
                                  Function<? super T,? extends Long> function)
```
    Maps the function across all rows, appending the results to a new LongColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into LongColumn.
    
    Returns:
    
    LongColumn with the results appended.
  - mapToShortColumn
```
public ShortColumn mapToShortColumn(String name,
                                    Function<? super T,? extends Short> function)
```
    Maps the function across all rows, appending the results to a new ShortColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into ShortColumn.
    
    Returns:
    
    ShortColumn with the results appended.
  - mapToStringColumn
```
public StringColumn mapToStringColumn(String name,
                                      Function<? super T,? extends String> function)
```
    Maps the function across all rows, appending the results to a new StringColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into StringColumn.
    
    Returns:
    
    StringColumn with the results appended.
  - mapToTextColumn
```
public TextColumn mapToTextColumn(String name,
                                  Function<? super T,? extends String> function)
```
    Maps the function across all rows, appending the results to a new TextColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into TextColumn.
    
    Returns:
    
    TextColumn with the results appended.
  - mapToTimeColumn
```
public TimeColumn mapToTimeColumn(String name,
                                  Function<? super T,? extends LocalTime> function)
```
    Maps the function across all rows, appending the results to a new TimeColumn. Ignores missing values.
    
    Parameters:
    
    name - of the new column.
    
    function - to map current column into TimeColumn.
    
    Returns:
    
    TimeColumn with the results appended.

Class AbstractColumn<T>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface tech.tablesaw.columns.Column

Methods inherited from interface java.lang.Iterable

Methods inherited from interface java.util.Comparator

Field Detail

DEFAULT_ARRAY_SIZE

Constructor Detail

AbstractColumn

Method Detail

name

setName

type

emptyCopy

toString

asStringColumn

mapToBooleanColumn

mapToDateColumn

mapToDateTimeColumn

mapToDoubleColumn

mapToFloatColumn

mapToInstantColumn

mapToIntColumn

mapToLongColumn

mapToShortColumn

mapToStringColumn

mapToTextColumn

mapToTimeColumn