de.unknownreality.dataframe.join

Class JoinInfo

java.lang.Object

de.unknownreality.dataframe.join.JoinInfo

public class JoinInfo
extends Object

Created by Alex on 13.03.2016.

Constructor Summary

Constructors

Constructor and Description
JoinInfo(DataFrameHeader header, DataFrame dataFrameA, DataFrame dataFrameB) Creates a join information using both data frames and the joined data frame header.

Method Summary

Modifier and Type	Method and Description
protected void	addDataFrameAHeader(String original, String joined) Adds a original - joined header information for the first data frame.
protected void	addDataFrameBHeader(String original, String joined) Adds a original - joined header information for the second data frame.
String	getJoinedHeader(String original, DataFrame dataFrame) Returns the header name in the joined data frame for a header name from one of the original data frames This method throws a DataFrameRuntimeException if the data frame was not used for the join.
String	getJoinedHeaderA(String original) Returns the header name in the joined data frame for a header name from the first data frame
String	getJoinedHeaderB(String original) Returns the header name in the joined data frame for a header name from the second data frame
int	getJoinedIndex(String original, DataFrame dataFrame) Returns the column index in the joined data frame for a header name from one of the original data frames This method throws a DataFrameRuntimeException if the data frame was not used for the join.
int	getJoinedIndexA(String original) Returns the column index in the joined data frame for a header name from the first data frame
int	getJoinedIndexB(String original) Returns the column index in the joined data frame for a header name from the second data frame
boolean	isA(DataFrame dataFrame) Returns true if the specified data frame equals the first data frames used for the join.
boolean	isB(DataFrame dataFrame) Returns true if the specified data frame equals the second data frames used for the join.

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinInfo

public JoinInfo(DataFrameHeader header,
                DataFrame dataFrameA,
                DataFrame dataFrameB)

Creates a join information using both data frames and the joined data frame header.
The data frames are saved as WeakReference.

Parameters:

header - joined data frame header

dataFrameA - first data frame

dataFrameB - second data frame

Method Detail

isA

public boolean isA(DataFrame dataFrame)

Returns true if the specified data frame equals the first data frames used for the join.

Parameters:

dataFrame - input data frame

Returns:

true if the data frame equals the first data frame

isB

public boolean isB(DataFrame dataFrame)

Returns true if the specified data frame equals the second data frames used for the join.

Parameters:

dataFrame - input data frame

Returns:

true if the data frame equals the second data frame

addDataFrameAHeader

protected void addDataFrameAHeader(String original,
                                   String joined)

Adds a original - joined header information for the first data frame.

Parameters:

original - header name in the first data frame

joined - header name in the joined data frame

addDataFrameBHeader

protected void addDataFrameBHeader(String original,
                                   String joined)

Adds a original - joined header information for the second data frame.

Parameters:

original - header name in the second data frame

joined - header name in the joined data frame

getJoinedHeader

public String getJoinedHeader(String original,
                              DataFrame dataFrame)

Returns the header name in the joined data frame for a header name from one of the original data frames This method throws a DataFrameRuntimeException if the data frame was not used for the join.

Parameters:

original - original header name

dataFrame - data frame used for the join

Returns:

header name in the joined data frame

getJoinedIndex

public int getJoinedIndex(String original,
                          DataFrame dataFrame)

Returns the column index in the joined data frame for a header name from one of the original data frames This method throws a DataFrameRuntimeException if the data frame was not used for the join.

Parameters:

original - original header name

dataFrame - data frame used for the join

Returns:

header name in the joined data frame

getJoinedHeaderA

public String getJoinedHeaderA(String original)

Returns the header name in the joined data frame for a header name from the first data frame

Parameters:

original - header name in the first data frame

Returns:

header name in the joined data frame

getJoinedIndexA

public int getJoinedIndexA(String original)

Returns the column index in the joined data frame for a header name from the first data frame

Parameters:

original - header name in the first data frame

Returns:

column index in the joined data frame

getJoinedIndexB

public int getJoinedIndexB(String original)

Returns the column index in the joined data frame for a header name from the second data frame

Parameters:

original - header name in the second data frame

Returns:

column index in the joined data frame

getJoinedHeaderB

public String getJoinedHeaderB(String original)

Returns the header name in the joined data frame for a header name from the second data frame

Parameters:

original - header name in the second data frame

Returns:

header name in the joined data frame