DateColumnReference (tablesaw-core 0.22.0 API)

java.lang.Object
- tech.tablesaw.columns.ColumnReference
- - tech.tablesaw.columns.dates.DateColumnReference

```
public class DateColumnReference
extends ColumnReference
```
A reference to a column that can be used in evaluating query predicates. It is a key part of having a fluent API for querying tables.
Basically, it lets you write a query like this:
table.select(column("foo").isEqualTo("Bar"));
In that example, column() is a static method that returns a ColumnReference for a column named "foo". The method isEqualTo(), is implemented on ColumnReference in a way that it can be applied to potentially, multiple column types, although in this case, it only makes sense for CategoryColumns since the argument is a string.
When select() isExecuted, it supplies the table to the ColumnReference. The ColumnReference uses the table and columnName to get access to the right column, and then fulfils its role by ensuring that the filtering "isEqualTo("Bar") is applied to all the cells in the column.

Constructor Summary

Constructors
Constructor and Description

DateColumnReference(String column)

Constructors
Constructor and Description
`DateColumnReference(String column)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Filter`	`isAfter(DateColumn reference)`
`Filter`	`isAfter(DateColumnReference reference)`
`Filter`	`isAfter(LocalDate date)`
`Filter`	`isAfter(LocalDateTime value)`
`Filter`	`isBefore(DateColumn reference)`
`Filter`	`isBefore(DateColumnReference reference)`
`Filter`	`isBefore(LocalDate date)`
`Filter`	`isBefore(LocalDateTime value)`
`Filter`	`isBetweenExcluding(LocalDate low, LocalDate high)`
`Filter`	`isBetweenIncluding(LocalDate low, LocalDate high)`
`Filter`	`isEqualTo(DateColumn reference)`
`Filter`	`isEqualTo(DateColumnReference reference)`
`Filter`	`isEqualTo(LocalDate value)`
`IsFirstDayOfTheMonth`	`isFirstDayOfMonth()`
`IsFriday`	`isFriday()`
`IsInApril`	`isInApril()`
`Filter`	`isInAugust()`
`Filter`	`isInDecember()`
`IsInFebruary`	`isInFebruary()`
`IsInJanuary`	`isInJanuary()`
`Filter`	`isInJuly()`
`IsInJune`	`isInJune()`
`IsInMarch`	`isInMarch()`
`IsInMay`	`isInMay()`
`Filter`	`isInNovember()`
`Filter`	`isInOctober()`
`IsInQ1`	`isInQ1()`
`IsInQ2`	`isInQ2()`
`IsInQ3`	`isInQ3()`
`IsInQ4`	`isInQ4()`
`Filter`	`isInSeptember()`
`IsInYear`	`isInYear(int year)`
`IsLastDayOfTheMonth`	`isLastDayOfMonth()`
`IsMonday`	`isMonday()`
`Filter`	`isNotEqualTo(DateColumn reference)`
`Filter`	`isNotEqualTo(DateColumnReference reference)`
`Filter`	`isOnOrAfter(DateColumn reference)`
`Filter`	`isOnOrAfter(DateColumnReference reference)`
`Filter`	`isOnOrBefore(DateColumn reference)`
`Filter`	`isOnOrBefore(DateColumnReference reference)`
`IsSaturday`	`isSaturday()`
`IsSunday`	`isSunday()`
`IsThursday`	`isThursday()`
`IsTuesday`	`isTuesday()`
`IsWednesday`	`isWednesday()`

Methods inherited from class tech.tablesaw.columns.ColumnReference
getColumnName, isMissing, isNotMissing

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

Constructor Detail

DateColumnReference

public DateColumnReference(String column)

Method Detail

isEqualTo

public Filter isEqualTo(DateColumnReference reference)

isNotEqualTo

public Filter isNotEqualTo(DateColumnReference reference)

isAfter

public Filter isAfter(DateColumnReference reference)

isBefore

public Filter isBefore(DateColumnReference reference)

isOnOrBefore

public Filter isOnOrBefore(DateColumnReference reference)

isOnOrBefore

public Filter isOnOrBefore(DateColumn reference)

isEqualTo

public Filter isEqualTo(DateColumn reference)

isNotEqualTo

public Filter isNotEqualTo(DateColumn reference)

isAfter

public Filter isAfter(DateColumn reference)

isOnOrAfter

public Filter isOnOrAfter(DateColumn reference)

isOnOrAfter

public Filter isOnOrAfter(DateColumnReference reference)

isBefore

public Filter isBefore(DateColumn reference)

isBetweenIncluding

public Filter isBetweenIncluding(LocalDate low,
                                 LocalDate high)

isBetweenExcluding

public Filter isBetweenExcluding(LocalDate low,
                                 LocalDate high)

isEqualTo

public Filter isEqualTo(LocalDate value)

isBefore

public Filter isBefore(LocalDateTime value)

isAfter

public Filter isAfter(LocalDateTime value)

isBefore

public Filter isBefore(LocalDate date)

isAfter

public Filter isAfter(LocalDate date)

isSunday
```
public IsSunday isSunday()
```

isMonday
```
public IsMonday isMonday()
```

isTuesday
```
public IsTuesday isTuesday()
```

isWednesday
```
public IsWednesday isWednesday()
```

isThursday
```
public IsThursday isThursday()
```

isFriday
```
public IsFriday isFriday()
```

isSaturday
```
public IsSaturday isSaturday()
```

isInJanuary
```
public IsInJanuary isInJanuary()
```

isInFebruary
```
public IsInFebruary isInFebruary()
```

isInMarch
```
public IsInMarch isInMarch()
```

isInApril
```
public IsInApril isInApril()
```

isInMay
```
public IsInMay isInMay()
```

isInJune
```
public IsInJune isInJune()
```

isInJuly
```
public Filter isInJuly()
```

isInAugust
```
public Filter isInAugust()
```

isInSeptember
```
public Filter isInSeptember()
```

isInOctober
```
public Filter isInOctober()
```

isInNovember
```
public Filter isInNovember()
```

isInDecember
```
public Filter isInDecember()
```

isInQ1
```
public IsInQ1 isInQ1()
```

isInQ2
```
public IsInQ2 isInQ2()
```

isInQ3
```
public IsInQ3 isInQ3()
```

isInQ4
```
public IsInQ4 isInQ4()
```

isFirstDayOfMonth

public IsFirstDayOfTheMonth isFirstDayOfMonth()

isLastDayOfMonth

public IsLastDayOfTheMonth isLastDayOfMonth()

isInYear
```
public IsInYear isInYear(int year)
```

Class DateColumnReference

Constructor Summary

Method Summary

Methods inherited from class tech.tablesaw.columns.ColumnReference

Methods inherited from class java.lang.Object

Constructor Detail

DateColumnReference

Method Detail

isEqualTo

isNotEqualTo

isAfter

isBefore

isOnOrBefore

isOnOrBefore

isEqualTo

isNotEqualTo

isAfter

isOnOrAfter

isOnOrAfter

isBefore

isBetweenIncluding

isBetweenExcluding

isEqualTo

isBefore

isAfter

isBefore

isAfter

isSunday

isMonday

isTuesday

isWednesday

isThursday

isFriday

isSaturday

isInJanuary

isInFebruary

isInMarch

isInApril

isInMay

isInJune

isInJuly

isInAugust

isInSeptember

isInOctober

isInNovember

isInDecember

isInQ1

isInQ2

isInQ3

isInQ4

isFirstDayOfMonth

isLastDayOfMonth

isInYear