tech.tablesaw.columns.times

Class TimeColumnReference

java.lang.Object

tech.tablesaw.columns.ColumnReference

tech.tablesaw.columns.times.TimeColumnReference

public class TimeColumnReference
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
TimeColumnReference(String column)

Method Summary

Modifier and Type	Method and Description
IsAfter	isAfter(LocalTime value)
ColumnIsAfter	isAfter(TimeColumn value)
ColumnIsAfter	isAfter(TimeColumnReference value)
IsAfterNoon	isAfterNoon()
IsBefore	isBefore(LocalTime value)
ColumnIsBefore	isBefore(TimeColumn value)
ColumnIsBefore	isBefore(TimeColumnReference value)
IsBeforeNoon	isBeforeNoon()
EqualTo	isEqualTo(LocalTime value)
ColumnEqualTo	isEqualTo(TimeColumn value)
ColumnEqualTo	isEqualTo(TimeColumnReference value)
IsMidnight	isMidnight()
IsNoon	isNoon()
NotEqualTo	isNotEqualTo(LocalTime value)
ColumnNotEqualTo	isNotEqualTo(TimeColumn value)
ColumnNotEqualTo	isNotEqualTo(TimeColumnReference value)
IsOnOrAfter	isOnOrAfter(LocalTime value)
IsOnOrBefore	isOnOrBefore(LocalTime value)

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

TimeColumnReference

public TimeColumnReference(String column)

Method Detail

isEqualTo

public EqualTo isEqualTo(LocalTime value)

isEqualTo

public ColumnEqualTo isEqualTo(TimeColumn value)

isEqualTo

public ColumnEqualTo isEqualTo(TimeColumnReference value)

isNotEqualTo

public ColumnNotEqualTo isNotEqualTo(TimeColumn value)

isNotEqualTo

public ColumnNotEqualTo isNotEqualTo(TimeColumnReference value)

isNotEqualTo

public NotEqualTo isNotEqualTo(LocalTime value)

isBefore

public IsBefore isBefore(LocalTime value)

isBefore

public ColumnIsBefore isBefore(TimeColumn value)

isBefore

public ColumnIsBefore isBefore(TimeColumnReference value)

isAfter

public IsAfter isAfter(LocalTime value)

isAfter

public ColumnIsAfter isAfter(TimeColumn value)

isAfter

public ColumnIsAfter isAfter(TimeColumnReference value)

isOnOrAfter

public IsOnOrAfter isOnOrAfter(LocalTime value)

isOnOrBefore

public IsOnOrBefore isOnOrBefore(LocalTime value)

isMidnight

public IsMidnight isMidnight()

isNoon

public IsNoon isNoon()

isBeforeNoon

public IsBeforeNoon isBeforeNoon()

isAfterNoon

public IsAfterNoon isAfterNoon()