java.lang.Object
- tech.tablesaw.columns.AbstractColumn<DateColumn,LocalDate>
- - tech.tablesaw.api.DateColumn

All Implemented Interfaces:

Iterable<LocalDate>, Comparator<LocalDate>, CategoricalColumn<LocalDate>, Column<LocalDate>, DateFillers<DateColumn>, DateFilters, DateMapFunctions, DateAndDateTimeFilterSpec<Selection>, FilterSpec<Selection>
```
public class DateColumn
extends AbstractColumn<DateColumn,LocalDate>
implements DateFilters, DateFillers<DateColumn>, DateMapFunctions, CategoricalColumn<LocalDate>
```
A column that contains int-encoded local date values

Field Summary

Fields
Modifier and Type Field Description

protected it.unimi.dsi.fastutil.ints.IntArrayList data
The data held in this column in its integer encoding form.
- Fields inherited from class tech.tablesaw.columns.AbstractColumn
  DEFAULT_ARRAY_SIZE

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`DateColumn`	`append(LocalDate value)`	Appends value to the bottom of this column and return this column
`DateColumn`	`append(Column<LocalDate> column)`	Appends all the values in the argument to the bottom of this column and return this column
`DateColumn`	`append(Column<LocalDate> column, int row)`	Appends the value at the given row in the given column to the bottom of this column and return this column
`DateColumn`	`appendCell(String string)`	Add one element to the bottom of this column and set its value to the parsed value of the given String.
`DateColumn`	`appendCell(String string, AbstractColumnParser<?> parser)`	Add one element to the bottom of this column and set its value to the parsed value of the given String, as performed by the given parser
`DateColumn`	`appendInternal(int f)`
`DateColumn`	`appendMissing()`	Appends a missing value appropriate to the column
`DateColumn`	`appendObj(Object obj)`	Appends the given value to the bottom of this column and return this column
`byte[]`	`asBytes(int rowNumber)`	Returns the contents of the cell at rowNumber as a byte[]
`double[]`	`asDoubleArray()`
`DoubleColumn`	`asDoubleColumn()`
`List<LocalDate>`	`asList()`	Returns a list of all the elements in this column
`LocalDate[]`	`asObjectArray()`	Returns an array of objects as appropriate for my type of column
`Set<LocalDate>`	`asSet()`	Returns a Set containing all the unique values in this column
`List<LocalDate>`	`bottom(int n)`	Returns the smallest ("bottom") n values in the column
`int`	`byteSize()`	Returns the width of a cell in this column, in bytes.
`void`	`clear()`	Removes all elements TODO: Make this return this column
`int`	`compare(LocalDate o1, LocalDate o2)`
`boolean`	`contains(LocalDate localDate)`	Returns `true` if the given object appears in this column, and false otherwise
`DateColumn`	`copy()`	Returns a deep copy of the receiver
`int`	`countMissing()`	Returns the count of missing values in this column
`int`	`countUnique()`	Returns the count of unique values in this column.
`static DateColumn`	`create(String name)`	Creates a new DateColumn with the given name.
`static DateColumn`	`create(String name, int initialSize)`	Creates a new DateColumn with the given name.
`static DateColumn`	`create(String name, LocalDate... data)`	Creates a new DateColumn with the given name and data
`static DateColumn`	`create(String name, Collection<LocalDate> data)`	Creates a new DateColumn with the given name and data
`static DateColumn`	`create(String name, Stream<LocalDate> stream)`	Creates a new DateColumn with the given name and data
`static DateColumn`	`createInternal(String name, int[] data)`	Creates a new DateColumn with the given name and integer-encoded data.
`DateColumn`	`emptyCopy()`	Returns a copy of the receiver with no data.
`DateColumn`	`emptyCopy(int rowSize)`	Returns an empty copy of the receiver, with its internal storage initialized to the given row size.
`boolean`	`equals(int rowNumber1, int rowNumber2)`	Returns true if the value in this column at rowNumber1 is equal to the value at rowNumber2
`DateColumn`	`fillWith(Iterable<LocalDate> iterable)`
`DateColumn`	`fillWith(Supplier<LocalDate> supplier)`
`DateColumn`	`fillWith(Iterator<LocalDate> iterator)`
`LocalDate`	`get(int index)`	Returns the value at the given zero-based index
`double`	`getDouble(int i)`
`int`	`getIntInternal(int index)`
`protected int`	`getPackedDate(int index)`
`String`	`getString(int row)`	Returns a string representation of the value at the given row.
`String`	`getUnformattedString(int row)`	Returns a String representation of the value at index r, without any formatting applied
`it.unimi.dsi.fastutil.ints.IntIterator`	`intIterator()`
`boolean`	`isEmpty()`	Returns true if the column has no data
`boolean`	`isMissing(int rowNumber)`	Returns true if the value at rowNumber is missing
`Iterator<LocalDate>`	`iterator()`	Returns an iterator over elements of type `T`.
`DateColumn`	`lag(int n)`	Returns a column of the same type and size as the receiver, containing the receivers values offset by n.
`DateColumn`	`lead(int n)`	Returns a column of the same type as the receiver, containing the receivers values offset -n For example if you lead a column containing 2, 3, 4 by 1, you get a column containing 3, 4, NA.
`LocalDate`	`max()`
`LocalDate`	`min()`
`DateColumn`	`removeMissing()`	Returns a copy of this column with the missing values removed
`it.unimi.dsi.fastutil.ints.IntComparator`	`rowComparator()`	Returns an IntComparator for sorting my rows
`DateColumn`	`set(int index, int value)`
`DateColumn`	`set(int index, LocalDate value)`	Sets the value at index row to the given value and return this column
`DateColumn`	`set(int row, Column<LocalDate> column, int sourceRow)`	Sets the value at row to the value at sourceRow in the given column and return this column
`DateColumn`	`set(Selection rowSelection, LocalDate newValue)`	Conditionally update this column, replacing current values with newValue for all rows where the current value matches the selection criteria
`DateColumn`	`setMissing(int i)`	Sets the value at index i to the missing-value indicator for this column type, and return this column
`void`	`setPrintFormatter(DateTimeFormatter dateTimeFormatter)`	Creates and sets a printFormatter based-on the given DateTimeFormatter.
`void`	`setPrintFormatter(DateTimeFormatter dateTimeFormatter, String missingValueString)`	Creates and sets a printFormatter based-on the given DateTimeFormatter.
`void`	`setPrintFormatter(DateColumnFormatter dateColumnFormatter)`	Sets the print formatter to the argument
`int`	`size()`	Returns the number of elements in this column, including missing values
`void`	`sortAscending()`	Sorts my values in ascending order
`void`	`sortDescending()`	Sorts my values in descending order
`DateColumn`	`subset(int[] rows)`	Return a column of the same type containing just those elements whose indexes are included in the given array
`Table`	`summary()`	Returns a table of dates and the number of observations of those dates
`List<LocalDate>`	`top(int n)`	Returns the largest ("top") n values in the column
`DateColumn`	`unique()`	Returns a column of the same type containing only the unique values
`int`	`valueHash(int rowNumber)`	Returns an int suitable as a hash for the value in this column at the given index
`static boolean`	`valueIsMissing(int i)`
`DateColumn`	`where(Selection selection)`	Returns a new column containing the subset referenced by the `Selection`

Methods inherited from class tech.tablesaw.columns.AbstractColumn
asStringColumn, filter, first, indexOf, inRange, last, lastIndexOf, map, max, min, name, parser, sampleN, sampleX, set, setName, setParser, sorted, toString, type

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

Methods inherited from interface tech.tablesaw.api.CategoricalColumn
countByCategory

Methods inherited from interface tech.tablesaw.columns.Column
allMatch, anyMatch, asStringColumn, columnWidth, count, count, filter, first, indexOf, inRange, interpolate, last, lastIndexOf, map, map, mapInto, max, max, min, min, name, noneMatch, parser, print, reduce, reduce, rolling, sampleN, sampleX, set, set, set, setMissingTo, setName, setParser, sorted, title, type

Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from interface tech.tablesaw.columns.dates.DateFilters
eval, eval, eval, eval, eval, isAfter, isAfter, isAfter, isBefore, isBefore, isBefore, isBetweenExcluding, isBetweenExcluding, isBetweenIncluding, isBetweenIncluding, isEqualTo, isEqualTo, isEqualTo, isFirstDayOfMonth, isFriday, isInApril, isInAugust, isInDecember, isInFebruary, isInJanuary, isInJuly, isInJune, isInMarch, isInMay, isInNovember, isInOctober, isInQ1, isInQ2, isInQ3, isInQ4, isInSeptember, isInYear, isLastDayOfMonth, isMissing, isMonday, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotMissing, isOnOrAfter, isOnOrAfter, isOnOrBefore, isOnOrBefore, isSaturday, isSunday, isThursday, isTuesday, isWednesday

Methods inherited from interface tech.tablesaw.columns.dates.DateMapFunctions
atStartOfDay, atTime, atTime, dayOfMonth, dayOfWeek, dayOfWeekValue, dayOfYear, daysUntil, minus, minusDays, minusMonths, minusWeeks, minusYears, month, monthsUntil, monthValue, plus, plusDays, plusMonths, plusWeeks, plusYears, timeUntil, timeWindow, timeWindow, weeksUntil, year, yearDay, yearMonth, yearQuarter, yearsUntil, yearWeek

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

- Field Detail
  - data
```
protected it.unimi.dsi.fastutil.ints.IntArrayList data
```
    The data held in this column in its integer encoding form. See PackedLocalDate
- Method Detail
  - create
```
public static DateColumn create(String name)
```
    Creates a new DateColumn with the given name. The column is completely empty.
  - createInternal
```
public static DateColumn createInternal(String name,
                                        int[] data)
```
    Creates a new DateColumn with the given name and integer-encoded data. See PackedLocalDate for details of the encoding
  - create
```
public static DateColumn create(String name,
                                int initialSize)
```
    Creates a new DateColumn with the given name. The column contains initialSize missing values.
  - create
```
public static DateColumn create(String name,
                                Collection<LocalDate> data)
```
    Creates a new DateColumn with the given name and data
  - create
```
public static DateColumn create(String name,
                                LocalDate... data)
```
    Creates a new DateColumn with the given name and data
  - create
```
public static DateColumn create(String name,
                                Stream<LocalDate> stream)
```
    Creates a new DateColumn with the given name and data
  - size
```
public int size()
```
    Returns the number of elements in this column, including missing values
    
    Specified by:
    
    size in interface Column<LocalDate>
  - subset
```
public DateColumn subset(int[] rows)
```
    Return a column of the same type containing just those elements whose indexes are included in the given array
    
    Specified by:
    
    subset in interface Column<LocalDate>
    
    Overrides:
    
    subset in class AbstractColumn<DateColumn,LocalDate>
  - appendInternal
```
public DateColumn appendInternal(int f)
```
  - set
```
public DateColumn set(int index,
                      int value)
```
  - set
```
public DateColumn set(int index,
                      LocalDate value)
```
    Sets the value at index row to the given value and return this column
    
    Specified by:
    
    set in interface Column<LocalDate>
  - setPrintFormatter
```
public void setPrintFormatter(DateTimeFormatter dateTimeFormatter,
                              String missingValueString)
```
    Creates and sets a printFormatter based-on the given DateTimeFormatter. Missing values will be printed as the given missingValueString. Non missing values will be handled by the dateTimeFormatter
  - setPrintFormatter
```
public void setPrintFormatter(DateTimeFormatter dateTimeFormatter)
```
    Creates and sets a printFormatter based-on the given DateTimeFormatter. Missing values will be printed as empty strings. Non missing values will be handled by the dateTimeFormatter
  - setPrintFormatter
```
public void setPrintFormatter(@Nonnull
                              DateColumnFormatter dateColumnFormatter)
```
    Sets the print formatter to the argument
  - getString
```
public String getString(int row)
```
    Returns a string representation of the value at the given row.
    
    Specified by:
    
    getString in interface Column<LocalDate>
    
    Parameters:
    
    row - The index of the row.
    
    Returns:
    
    value as String
  - getUnformattedString
```
public String getUnformattedString(int row)
```
    Returns a String representation of the value at index r, without any formatting applied
    
    Specified by:
    
    getUnformattedString in interface Column<LocalDate>
  - emptyCopy
```
public DateColumn emptyCopy()
```
    Returns a copy of the receiver with no data. The column name and type are the same.
    
    Specified by:
    
    emptyCopy in interface Column<LocalDate>
    
    Specified by:
    
    emptyCopy in class AbstractColumn<DateColumn,LocalDate>
    
    Returns:
    
    a empty copy of Column
  - emptyCopy
```
public DateColumn emptyCopy(int rowSize)
```
    Returns an empty copy of the receiver, with its internal storage initialized to the given row size.
    
    Specified by:
    
    emptyCopy in interface Column<LocalDate>
    
    Parameters:
    
    rowSize - the initial row size
    
    Returns:
    
    a Column
  - copy
```
public DateColumn copy()
```
    Returns a deep copy of the receiver
    
    Specified by:
    
    copy in interface Column<LocalDate>
    
    Returns:
    
    a Column
  - clear
```
public void clear()
```
    Removes all elements TODO: Make this return this column
    
    Specified by:
    
    clear in interface Column<LocalDate>
  - lead
```
public DateColumn lead(int n)
```
    Returns a column of the same type as the receiver, containing the receivers values offset -n For example if you lead a column containing 2, 3, 4 by 1, you get a column containing 3, 4, NA.
    
    Specified by:
    
    lead in interface Column<LocalDate>
  - lag
```
public DateColumn lag(int n)
```
    Returns a column of the same type and size as the receiver, containing the receivers values offset by n.
    For example if you lag a column containing 2, 3, 4 by 1, you get a column containing NA, 2, 3
    
    Specified by:
    
    lag in interface Column<LocalDate>
  - sortAscending
```
public void sortAscending()
```
    Sorts my values in ascending order
    
    Specified by:
    
    sortAscending in interface Column<LocalDate>
  - sortDescending
```
public void sortDescending()
```
    Sorts my values in descending order
    
    Specified by:
    
    sortDescending in interface Column<LocalDate>
  - countUnique
```
public int countUnique()
```
    Returns the count of unique values in this column.
    
    Specified by:
    
    countUnique in interface Column<LocalDate>
    
    Returns:
    
    unique values as int
  - unique
```
public DateColumn unique()
```
    Returns a column of the same type containing only the unique values
    
    Specified by:
    
    unique in interface Column<LocalDate>
    
    Returns:
    
    a Column
  - append
```
public DateColumn append(Column<LocalDate> column)
```
    Appends all the values in the argument to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<LocalDate>
  - append
```
public DateColumn append(Column<LocalDate> column,
                         int row)
```
    Appends the value at the given row in the given column to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<LocalDate>
  - set
```
public DateColumn set(int row,
                      Column<LocalDate> column,
                      int sourceRow)
```
    Sets the value at row to the value at sourceRow in the given column and return this column
    
    Specified by:
    
    set in interface Column<LocalDate>
  - max
```
public LocalDate max()
```
    Specified by:
    
    max in interface DateMapFunctions
  - min
```
public LocalDate min()
```
    Specified by:
    
    min in interface DateMapFunctions
  - set
```
public DateColumn set(Selection rowSelection,
                      LocalDate newValue)
```
    Conditionally update this column, replacing current values with newValue for all rows where the current value matches the selection criteria
    Example: myColumn.set(myColumn.valueIsMissing(), LocalDate.now()); // no more missing values
    
    Specified by:
    
    set in interface Column<LocalDate>
    
    Overrides:
    
    set in class AbstractColumn<DateColumn,LocalDate>
  - appendMissing
```
public DateColumn appendMissing()
```
    Appends a missing value appropriate to the column
    
    Specified by:
    
    appendMissing in interface Column<LocalDate>
  - get
```
public LocalDate get(int index)
```
    Returns the value at the given zero-based index
    
    Specified by:
    
    get in interface Column<LocalDate>
    
    Specified by:
    
    get in interface DateMapFunctions
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if the column has no data
    
    Specified by:
    
    isEmpty in interface Column<LocalDate>
    
    Returns:
    
    true if empty, false if not
  - rowComparator
```
public it.unimi.dsi.fastutil.ints.IntComparator rowComparator()
```
    Returns an IntComparator for sorting my rows
    
    Specified by:
    
    rowComparator in interface Column<LocalDate>
  - append
```
public DateColumn append(LocalDate value)
```
    Appends value to the bottom of this column and return this column
    
    Specified by:
    
    append in interface Column<LocalDate>
  - appendObj
```
public DateColumn appendObj(Object obj)
```
    Appends the given value to the bottom of this column and return this column
    
    Specified by:
    
    appendObj in interface Column<LocalDate>
  - appendCell
```
public DateColumn appendCell(String string)
```
    Add one element to the bottom of this column and set its value to the parsed value of the given String. Parsing is type-specific
    
    Specified by:
    
    appendCell in interface Column<LocalDate>
  - appendCell
```
public DateColumn appendCell(String string,
                             AbstractColumnParser<?> parser)
```
    Add one element to the bottom of this column and set its value to the parsed value of the given String, as performed by the given parser
    
    Specified by:
    
    appendCell in interface Column<LocalDate>
  - getIntInternal
```
public int getIntInternal(int index)
```
    Specified by:
    
    getIntInternal in interface DateFilters
    
    Specified by:
    
    getIntInternal in interface DateMapFunctions
  - getPackedDate
```
protected int getPackedDate(int index)
```
  - summary
```
public Table summary()
```
    Returns a table of dates and the number of observations of those dates
    
    Specified by:
    
    summary in interface Column<LocalDate>
    
    Returns:
    
    the summary table
  - valueIsMissing
```
public static boolean valueIsMissing(int i)
```
  - countMissing
```
public int countMissing()
```
    Returns the count of missing values in this column
    
    Specified by:
    
    countMissing in interface Column<LocalDate>
    
    Returns:
    
    missing values as int
  - top
```
public List<LocalDate> top(int n)
```
    Returns the largest ("top") n values in the column
    
    Parameters:
    
    n - The maximum number of records to return. The actual number will be smaller if n is greater than the number of observations in the column
    
    Returns:
    
    A list, possibly empty, of the largest observations
  - bottom
```
public List<LocalDate> bottom(int n)
```
    Returns the smallest ("bottom") n values in the column
    
    Parameters:
    
    n - The maximum number of records to return. The actual number will be smaller if n is greater than the number of observations in the column
    
    Returns:
    
    A list, possibly empty, of the smallest n observations
  - intIterator
```
public it.unimi.dsi.fastutil.ints.IntIterator intIterator()
```
    Specified by:
    
    intIterator in interface DateFilters
  - removeMissing
```
public DateColumn removeMissing()
```
    Returns a copy of this column with the missing values removed
    
    Specified by:
    
    removeMissing in interface Column<LocalDate>
  - asList
```
public List<LocalDate> asList()
```
    Returns a list of all the elements in this column
    Note, if a value in the column is missing, a null is added in it's place
    
    Specified by:
    
    asList in interface Column<LocalDate>
  - where
```
public DateColumn where(Selection selection)
```
    Returns a new column containing the subset referenced by the Selection
    
    Specified by:
    
    where in interface Column<LocalDate>
    
    Specified by:
    
    where in interface DateFilters
  - asSet
```
public Set<LocalDate> asSet()
```
    Returns a Set containing all the unique values in this column
    
    Specified by:
    
    asSet in interface Column<LocalDate>
  - contains
```
public boolean contains(LocalDate localDate)
```
    Returns true if the given object appears in this column, and false otherwise
    TODO override in column subtypes for performance
    
    Specified by:
    
    contains in interface Column<LocalDate>
  - setMissing
```
public DateColumn setMissing(int i)
```
    Sets the value at index i to the missing-value indicator for this column type, and return this column
    
    Specified by:
    
    setMissing in interface Column<LocalDate>
  - asDoubleArray
```
public double[] asDoubleArray()
```
  - asDoubleColumn
```
public DoubleColumn asDoubleColumn()
```
  - isMissing
```
public boolean isMissing(int rowNumber)
```
    Returns true if the value at rowNumber is missing
    
    Specified by:
    
    isMissing in interface Column<LocalDate>
  - getDouble
```
public double getDouble(int i)
```
  - byteSize
```
public int byteSize()
```
    Returns the width of a cell in this column, in bytes.
    
    Specified by:
    
    byteSize in interface Column<LocalDate>
    
    Returns:
    
    width in bytes
  - valueHash
```
public int valueHash(int rowNumber)
```
    Returns an int suitable as a hash for the value in this column at the given index
    
    Specified by:
    
    valueHash in interface Column<LocalDate>
  - equals
```
public boolean equals(int rowNumber1,
                      int rowNumber2)
```
    Returns true if the value in this column at rowNumber1 is equal to the value at rowNumber2
    
    Specified by:
    
    equals in interface Column<LocalDate>
  - asBytes
```
public byte[] asBytes(int rowNumber)
```
    Returns the contents of the cell at rowNumber as a byte[]
    
    Specified by:
    
    asBytes in interface Column<LocalDate>
    
    Parameters:
    
    rowNumber - the number of the row as int
    
    Returns:
    
    content as byte[]
  - iterator
```
public Iterator<LocalDate> iterator()
```
    Returns an iterator over elements of type T.
    
    Specified by:
    
    iterator in interface Iterable<LocalDate>
    
    Returns:
    
    an Iterator.
  - fillWith
```
public DateColumn fillWith(Iterator<LocalDate> iterator)
```
    Specified by:
    
    fillWith in interface DateFillers<DateColumn>
  - fillWith
```
public DateColumn fillWith(Iterable<LocalDate> iterable)
```
    Specified by:
    
    fillWith in interface DateFillers<DateColumn>
  - fillWith
```
public DateColumn fillWith(Supplier<LocalDate> supplier)
```
    Specified by:
    
    fillWith in interface DateFillers<DateColumn>
  - asObjectArray
```
public LocalDate[] asObjectArray()
```
    Returns an array of objects as appropriate for my type of column
    
    Specified by:
    
    asObjectArray in interface Column<LocalDate>
  - compare
```
public int compare(LocalDate o1,
                   LocalDate o2)
```
    Specified by:
    
    compare in interface Comparator<LocalDate>

Class DateColumn

Field Summary

Fields inherited from class tech.tablesaw.columns.AbstractColumn

Method Summary

Methods inherited from class tech.tablesaw.columns.AbstractColumn

Methods inherited from class java.lang.Object

Methods inherited from interface tech.tablesaw.api.CategoricalColumn

Methods inherited from interface tech.tablesaw.columns.Column

Methods inherited from interface java.util.Comparator

Methods inherited from interface tech.tablesaw.columns.dates.DateFilters

Methods inherited from interface tech.tablesaw.columns.dates.DateMapFunctions

Methods inherited from interface java.lang.Iterable

Field Detail

data

Method Detail

create

createInternal

create

create

create

create

size

subset

appendInternal

set

set

setPrintFormatter

setPrintFormatter

setPrintFormatter

getString

getUnformattedString

emptyCopy

emptyCopy

copy

clear

lead

lag

sortAscending

sortDescending

countUnique

unique

append

append

set

max

min

set

appendMissing

get

isEmpty

rowComparator

append

appendObj

appendCell

appendCell

getIntInternal

getPackedDate

summary

valueIsMissing

countMissing

top

bottom

intIterator

removeMissing

asList

where

asSet

contains

setMissing

asDoubleArray

asDoubleColumn

isMissing

getDouble

byteSize

valueHash

equals

asBytes

iterator

fillWith

fillWith