Package io.deephaven.engine.table.impl

Class MatchPair

java.lang.Object

io.deephaven.engine.table.impl.MatchPair

All Implemented Interfaces:

JoinAddition, JoinMatch, Pair, Serializable

public class MatchPair
extends Object
implements Pair, JoinMatch, JoinAddition, Serializable

Holds a pair of column names.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
final String	leftColumn
static final LogOutput.ObjFormatter<MatchPair[]>	MATCH_PAIR_ARRAY_FORMATTER
static final LogOutput.ObjFormatter<MatchPair>	MATCH_PAIR_FORMATTER
final String	rightColumn
static final MatchPair[]	ZERO_LENGTH_MATCH_PAIR_ARRAY

Constructor Summary

Constructors

Constructor	Description
MatchPair(String leftColumn, String rightColumn)	Inputs must be valid column names

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
ColumnName	existingColumn()	The existing column name, from the right table of a join operation.
static MatchPair[]	fromAddition(Collection<? extends JoinAddition> matches)
static MatchPair[]	fromMatches(Collection<? extends JoinMatch> matches)
static MatchPair[]	fromPairs(Collection<? extends Pair> pairs)
static String[]	getLeftColumns(MatchPair... matchPairs)
static String[]	getRightColumns(MatchPair... matchPairs)
int	hashCode()
ColumnName	input()	The input column.
ColumnName	left()	The column from the left table.
String	leftColumn()
static String	matchString(MatchPair matchPair)
static String	matchString(MatchPair[] matchPairArray)
ColumnName	newColumn()	The new column name, to be added to the new table.
static MatchPair	of(JoinAddition addition)
static MatchPair	of(JoinMatch match)
static MatchPair	of(Pair pair)
ColumnName	output()	The output column.
static Stream<ColumnName>	outputs(Collection<MatchPair> pairs)
ColumnName	right()	The column name from the right table.
String	rightColumn()
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

ZERO_LENGTH_MATCH_PAIR_ARRAY

public static final MatchPair[] ZERO_LENGTH_MATCH_PAIR_ARRAY

leftColumn

public final String leftColumn

rightColumn

public final String rightColumn

MATCH_PAIR_ARRAY_FORMATTER

public static final LogOutput.ObjFormatter<MatchPair[]> MATCH_PAIR_ARRAY_FORMATTER

MATCH_PAIR_FORMATTER

public static final LogOutput.ObjFormatter<MatchPair> MATCH_PAIR_FORMATTER

Constructor Details

MatchPair

public MatchPair(String leftColumn,
 String rightColumn)

Inputs must be valid column names

Parameters:

leftColumn - LHS of the pair

rightColumn - RHS of the pair

Method Details

of

public static MatchPair of(Pair pair)

of

public static MatchPair of(JoinMatch match)

of

public static MatchPair of(JoinAddition addition)

fromMatches

public static MatchPair[] fromMatches(Collection<? extends JoinMatch> matches)

fromAddition

public static MatchPair[] fromAddition(Collection<? extends JoinAddition> matches)

fromPairs

public static MatchPair[] fromPairs(Collection<? extends Pair> pairs)

outputs

public static Stream<ColumnName> outputs(Collection<MatchPair> pairs)

toString

public String toString()

Overrides:

toString in class Object

leftColumn

public String leftColumn()

rightColumn

public String rightColumn()

getLeftColumns

public static String[] getLeftColumns(MatchPair... matchPairs)

getRightColumns

public static String[] getRightColumns(MatchPair... matchPairs)

matchString

public static String matchString(MatchPair[] matchPairArray)

matchString

public static String matchString(MatchPair matchPair)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

input

public ColumnName input()

Description copied from interface: Pair

The input column.

Specified by:

input in interface Pair

Returns:

the input column

output

public ColumnName output()

Description copied from interface: Pair

The output column.

Specified by:

output in interface Pair

Returns:

the output column

left

public ColumnName left()

Description copied from interface: JoinMatch

The column from the left table.

Specified by:

left in interface JoinMatch

Returns:

the left column name

right

public ColumnName right()

Description copied from interface: JoinMatch

The column name from the right table.

Specified by:

right in interface JoinMatch

Returns:

the right column name

newColumn

public ColumnName newColumn()

Description copied from interface: JoinAddition

The new column name, to be added to the new table.

Specified by:

newColumn in interface JoinAddition

Returns:

the new column name

existingColumn

public ColumnName existingColumn()

Description copied from interface: JoinAddition

The existing column name, from the right table of a join operation.

Specified by:

existingColumn in interface JoinAddition

Returns:

the existing column name