de.unknownreality.dataframe

Class DataFrameConverter

java.lang.Object

de.unknownreality.dataframe.DataFrameConverter

public class DataFrameConverter
extends Object

Created by Alex on 09.03.2016.

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	SAMPLE_ROW_DETECTION

Method Summary

Modifier and Type	Method and Description
static <R extends Row> DataFrame	fromDataIterator(DataIterator<R> dataIterator) Converts a parent data container to a data frame.
static <R extends Row> DataFrame	fromDataIterator(DataIterator<R> dataIterator, FilterPredicate filterPredicate) Converts a parent data container to a data frame.
static <R extends Row> DataFrame	fromDataIterator(DataIterator<R> dataIterator, int expectedSize, List<ColumnInformation> columnsInformation, FilterPredicate filterPredicate) Converts a parent data container to a data frame.
static <R extends Row> DataFrame	fromDataIterator(DataIterator<R> dataIterator, List<ColumnInformation> columnsInformation, FilterPredicate filterPredicate) Converts a parent data container to a data frame.

Methods inherited from class java.lang.Object

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

Field Detail

SAMPLE_ROW_DETECTION

public static boolean SAMPLE_ROW_DETECTION

Method Detail

fromDataIterator

public static <R extends Row> DataFrame fromDataIterator(DataIterator<R> dataIterator,
                                                         FilterPredicate filterPredicate)

Converts a parent data container to a data frame. The required column information is provided by a column information object. Column information specified by the dataIterator is used. Only rows validated by the filter are appended to the resulting data frame

Type Parameters:

R - row type

Parameters:

dataIterator - parent data container

filterPredicate - row filter

Returns:

created data frame

fromDataIterator

public static <R extends Row> DataFrame fromDataIterator(DataIterator<R> dataIterator,
                                                         List<ColumnInformation> columnsInformation,
                                                         FilterPredicate filterPredicate)

Converts a parent data container to a data frame. The required column information is provided by a column information object. If no column information is defined, the one specified by the dataIterator is used. Only rows validated by the filter are appended to the resulting data frame

Type Parameters:

R - row type

Parameters:

dataIterator - parent data container

columnsInformation - column information

filterPredicate - row filter

Returns:

created data frame

fromDataIterator

public static <R extends Row> DataFrame fromDataIterator(DataIterator<R> dataIterator,
                                                         int expectedSize,
                                                         List<ColumnInformation> columnsInformation,
                                                         FilterPredicate filterPredicate)

Converts a parent data container to a data frame. The required column information is provided by a column information object. If no column information is defined, the one specified by the dataIterator is used. Only rows validated by the filter are appended to the resulting data frame

Type Parameters:

R - row type

Parameters:

dataIterator - parent data container

expectedSize - expected size of the resulting dataframe

columnsInformation - column information

filterPredicate - row filter

Returns:

created data frame

fromDataIterator

public static <R extends Row> DataFrame fromDataIterator(DataIterator<R> dataIterator)

Converts a parent data container to a data frame. The required column information is provided by a column information map. Keys in this map are name of the column in the parent data container. Values are the corresponding data frame columns.

Type Parameters:

R - row type

Parameters:

dataIterator - parent data container

Returns:

created data frame