Package app.babylon.table.grouping

Interface GroupKey

All Superinterfaces:

Comparable<GroupKey>

All Known Implementing Classes:

GroupKey.ElementsGroupKey

public interface GroupKey
extends Comparable<GroupKey>

Represents a composite grouping key made up of one or more ordered key components.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static final class	GroupKey.ElementsGroupKey	Concrete group-key implementation backed by an object array.

Method Summary

Modifier and Type	Method	Description
default int	compareTo(GroupKey o)
Object	getComponent(int i)	Returns one key component.
default Object	getFirst()	Returns the first key component.
default Object	getLast()	Returns the last key component.
default Object	getSecond()	Returns the second key component.
static GroupKey	of(Object... elements)	Creates a group key from ordered key components.
int	size()	Returns the number of key components.

Method Details

of

static GroupKey of(Object... elements)

Creates a group key from ordered key components.

Parameters:

elements - key components

Returns:

group key

getComponent

Object getComponent(int i)

Returns one key component.

Parameters:

i - component index

Returns:

key component

size

int size()

Returns the number of key components.

Returns:

component count

getFirst

default Object getFirst()

Returns the first key component.

Returns:

first component

getSecond

default Object getSecond()

Returns the second key component.

Returns:

second component

getLast

default Object getLast()

Returns the last key component.

Returns:

last component

compareTo

default int compareTo(GroupKey o)

Specified by:

compareTo in interface Comparable<GroupKey>