de.unknownreality.dataframe.join.impl

Class DefaultJoinUtil

java.lang.Object

de.unknownreality.dataframe.join.impl.DefaultJoinUtil

All Implemented Interfaces:

JoinUtil

public class DefaultJoinUtil
extends Object
implements JoinUtil

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 OuterJoin	OUTER INNER JOIN
static RightJoin	RIGHT RIGHT JOIN

Constructor Summary

Constructors

Constructor and Description
DefaultJoinUtil()

Method Summary

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

OUTER

public static final OuterJoin OUTER

INNER JOIN

Constructor Detail

DefaultJoinUtil

public DefaultJoinUtil()

Method Detail

leftJoin

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

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

Specified by:

leftJoin in interface JoinUtil

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 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

Specified by:

leftJoin in interface JoinUtil

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

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

Specified by:

rightJoin in interface JoinUtil

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 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

Specified by:

rightJoin in interface JoinUtil

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

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

Specified by:

innerJoin in interface JoinUtil

Parameters:

dfA - first data frame

dfB - second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

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

innerJoin

public 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

Specified by:

innerJoin in interface JoinUtil

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:

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

outerJoin

public JoinedDataFrame outerJoin(DataFrame dfA,
                                 DataFrame dfB,
                                 JoinColumn... joinColumns)

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

Specified by:

outerJoin in interface JoinUtil

Parameters:

dfA - first data frame

dfB - second data frame

joinColumns - columns used for the join

Returns:

joined data frame

See Also:

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

outerJoin

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

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

Specified by:

outerJoin in interface JoinUtil

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:

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