Package tech.tablesaw.joining

Class CrossProductJoin

java.lang.Object

tech.tablesaw.joining.CrossProductJoin

public class CrossProductJoin
extends Object

Implements joins between two or more Tables

Constructor Summary

Constructors

Constructor	Description
CrossProductJoin(Table table, String... joinColumnNames)	Constructor.

Method Summary

Modifier and Type	Method	Description
Table	performJoin(Table table1, Table table2, JoinType joinType, boolean allowDuplicates, boolean keepAllJoinKeyColumns, int[] leftJoinColumnIndexes, String... table2JoinColumnNames)	Joins two tables.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CrossProductJoin

public CrossProductJoin(Table table,
                        String... joinColumnNames)

Constructor.

Parameters:

table - The table to join on.

joinColumnNames - The join column names to join on.

Method Detail

performJoin

public Table performJoin(Table table1,
                         Table table2,
                         JoinType joinType,
                         boolean allowDuplicates,
                         boolean keepAllJoinKeyColumns,
                         int[] leftJoinColumnIndexes,
                         String... table2JoinColumnNames)

Joins two tables.

Parameters:

table1 - the table on the left side of the join.

table2 - the table on the right side of the join.

joinType - the type of join.

allowDuplicates - if false the join will fail if any columns other than the join column have the same name if true the join will succeed and duplicate columns are renamed

keepAllJoinKeyColumns - if false the join will only keep join key columns in table1 if true the join will return all join key columns in both table, which may have difference when there are null values

table2JoinColumnNames - The names of the columns in table2 to join on.

Returns:

the joined table

toString

public String toString()

Overrides:

toString in class Object