de.unknownreality.dataframe

Class DataFrameConverter

java.lang.Object

de.unknownreality.dataframe.DataFrameConverter

public class DataFrameConverter
extends Object

Created by Alex on 09.03.2016.

Method Summary

Modifier and Type	Method and Description
static DataFrame	fromDataContainer(DataContainer<?,?> reader, Map<String,DataFrameColumn> columns) Converts a parent data container to a data frame.
static DataFrame	fromDataContainer(DataContainer<?,?> reader, Map<String,DataFrameColumn> columns, 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

Method Detail

fromDataContainer

public static DataFrame fromDataContainer(DataContainer<?,?> reader,
                                          Map<String,DataFrameColumn> columns,
                                          FilterPredicate filterPredicate)

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. Only rows validated by the filter are appended to the resulting data frame

Parameters:

reader - parent data container

columns - column information map

filterPredicate - row filter

Returns:

created data frame

fromDataContainer

public static DataFrame fromDataContainer(DataContainer<?,?> reader,
                                          Map<String,DataFrameColumn> columns)

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.

Parameters:

reader - parent data container

columns - column information map

Returns:

created data frame