de.unknownreality.dataframe.join

Class JoinUtil

java.lang.Object

de.unknownreality.dataframe.join.JoinUtil

public class JoinUtil
extends Object

Created by Alex on 12.03.2016.

Field Summary

Fields

Modifier and Type	Field and Description
static InnerJoin	INNER INNER JOIN
static String	JOIN_SUFFIX_A
static String	JOIN_SUFFIX_B
static LeftJoin	LEFT LEFT JOIN
static RightJoin	RIGHT RIGHT JOIN

Constructor Summary

Constructors

Constructor and Description
JoinUtil()

Method Summary

Modifier and Type	Method and Description
static JoinedDataFrame	innerJoin(DataFrame dfA, DataFrame dfB, JoinColumn... joinColumns) Joins two data frames using the INNER JOIN method and the default header name suffixes
static JoinedDataFrame	innerJoin(DataFrame dfA, DataFrame dfB, String joinSuffixA, String joinSuffixB, JoinColumn... joinColumns) Joins two data frames using the INNER JOIN method and specified suffixes for the column header names
static JoinedDataFrame	leftJoin(DataFrame dfA, DataFrame dfB, JoinColumn... joinColumns) Joins two data frames using the LEFT JOIN method and the default header name suffixes
static JoinedDataFrame	leftJoin(DataFrame dfA, DataFrame dfB, String joinSuffixA, String joinSuffixB, JoinColumn... joinColumns) Joins two data frames using the LEFT JOIN method and specified suffixes for the column header names
static JoinedDataFrame	rightJoin(DataFrame dfA, DataFrame dfB, JoinColumn... joinColumns) Joins two data frames using the RIGHT JOIN method and the default header name suffixes
static JoinedDataFrame	rightJoin(DataFrame dfA, DataFrame dfB, String joinSuffixA, String joinSuffixB, JoinColumn... joinColumns) Joins two data frames using the RIGHT JOIN method and specified suffixes for the column header names

Methods inherited from class java.lang.Object

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

Field Detail

JOIN_SUFFIX_A

public static final String JOIN_SUFFIX_A

See Also:

Constant Field Values

JOIN_SUFFIX_B

public static final String JOIN_SUFFIX_B

See Also:

Constant Field Values

RIGHT

public static final RightJoin RIGHT

RIGHT JOIN

LEFT

public static final LeftJoin LEFT

LEFT JOIN

INNER

public static final InnerJoin INNER

INNER JOIN

Constructor Detail

JoinUtil

public JoinUtil()

Method Detail

leftJoin

public static JoinedDataFrame leftJoin(DataFrame dfA,
                                       DataFrame dfB,
                                       JoinColumn... joinColumns)

Joins two data frames using the LEFT JOIN method and the default header name suffixes

Parameters:

dfA - first data frame

dfB - second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)

leftJoin

public static JoinedDataFrame leftJoin(DataFrame dfA,
                                       DataFrame dfB,
                                       String joinSuffixA,
                                       String joinSuffixB,
                                       JoinColumn... joinColumns)

Joins two data frames using the LEFT JOIN method and specified suffixes for the column header names

Parameters:

dfA - first data frame

dfB - second data frame

joinSuffixA - suffix used for columns in the first data frame

joinSuffixB - suffix used for columns in the second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)

rightJoin

public static JoinedDataFrame rightJoin(DataFrame dfA,
                                        DataFrame dfB,
                                        JoinColumn... joinColumns)

Joins two data frames using the RIGHT JOIN method and the default header name suffixes

Parameters:

dfA - first data frame

dfB - second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)

rightJoin

public static JoinedDataFrame rightJoin(DataFrame dfA,
                                        DataFrame dfB,
                                        String joinSuffixA,
                                        String joinSuffixB,
                                        JoinColumn... joinColumns)

Joins two data frames using the RIGHT JOIN method and specified suffixes for the column header names

Parameters:

dfA - first data frame

dfB - second data frame

joinSuffixA - suffix used for columns in the first data frame

joinSuffixB - suffix used for columns in the second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)

innerJoin

public static JoinedDataFrame innerJoin(DataFrame dfA,
                                        DataFrame dfB,
                                        JoinColumn... joinColumns)

Joins two data frames using the INNER JOIN method and the default header name suffixes

Parameters:

dfA - first data frame

dfB - second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)

innerJoin

public static JoinedDataFrame innerJoin(DataFrame dfA,
                                        DataFrame dfB,
                                        String joinSuffixA,
                                        String joinSuffixB,
                                        JoinColumn... joinColumns)

Joins two data frames using the INNER JOIN method and specified suffixes for the column header names

Parameters:

dfA - first data frame

dfB - second data frame

joinSuffixA - suffix used for columns in the first data frame

joinSuffixB - suffix used for columns in the second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

LeftJoin.join(DataFrame, DataFrame, String, String, JoinColumn...)