uk.ac.starlink.table.join

Class RowLinkN

java.lang.Object

uk.ac.starlink.table.join.RowLink

uk.ac.starlink.table.join.RowLinkN

All Implemented Interfaces:

Comparable<RowLink>

Direct Known Subclasses:

PairsRowLink

public class RowLinkN
extends RowLink

RowLink implementation for an arbitrary number of RowRefs.

Since:

1 Sep 2021

Author:

Mark Taylor

Constructor Summary

Constructors

Modifier	Constructor and Description
	RowLinkN(Collection<RowRef> rows) Constructs a RowLinkN from a collection of rows.
protected	RowLinkN(RowRef[] rows) Constructs a RowLinkN from an array of row refs which is retained and may be modified (sorted) in place.

Method Summary

Modifier and Type	Method and Description
static RowLinkN	fromModifiableArray(RowRef[] rows) Constructs a RowLinkN from an array of row refs which is retained and may be modified (sorted) in place.
RowRef	getRef(int i) Returns the ith row ref in this ordered sequence of refs.
int	size() Returns the number of rows linked by this object.

Methods inherited from class uk.ac.starlink.table.join.RowLink

compareTo, createLink, equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

RowLinkN

public RowLinkN(Collection<RowRef> rows)

Constructs a RowLinkN from a collection of rows.

Parameters:

rows - collection of row refs, copied and not retained

RowLinkN

protected RowLinkN(RowRef[] rows)

Constructs a RowLinkN from an array of row refs which is retained and may be modified (sorted) in place. Use with care.

Parameters:

rows - array of rows which is retained and may be modified

Method Detail

size

public int size()

Description copied from class: RowLink

Returns the number of rows linked by this object.

Specified by:

size in class RowLink

Returns:

number of RowRefs

getRef

public RowRef getRef(int i)

Description copied from class: RowLink

Returns the i^th row ref in this ordered sequence of refs. The sequence must be as defined by RowRef.compareTo.

Specified by:

getRef in class RowLink

Parameters:

i - index

Returns:

RowRef at i

fromModifiableArray

public static RowLinkN fromModifiableArray(RowRef[] rows)

Constructs a RowLinkN from an array of row refs which is retained and may be modified (sorted) in place. Calling code should not make subsequent modifications to this array.

Parameters:

rows - array of rows which is retained and may be modified

Returns:

new RowLink