de.unknownreality.dataframe.meta

Class DataFrameMeta

java.lang.Object

de.unknownreality.dataframe.meta.DataFrameMeta

public class DataFrameMeta
extends Object

Created by Alex on 07.06.2016.

Field Summary

Fields

Modifier and Type	Field and Description
static String	META_FILE_EXTENSION

Constructor Summary

Constructors

Constructor and Description
DataFrameMeta()
DataFrameMeta(Map<String,Class<? extends DataFrameColumn>> columns, Class<? extends ReaderBuilder> readerBuilderClass, Map<String,String> attributes)

Method Summary

Modifier and Type	Method and Description
static DataFrameMeta	create(DataFrame dataFrame, Class<? extends ReaderBuilder> readerBuilderClass, DataWriter dataWriterBuilder) Creates data frame meta information
static DataFrameMeta	create(DataFrame dataFrame, Class<? extends ReaderBuilder> readerBuilderClass, Map<String,String> writerAttributes) Creates data frame meta information
Map<String,String>	getAttributes() Returns the attributes from the data writer used to write the data frame
Map<String,Class<? extends DataFrameColumn>>	getColumns() Returns a map of the columns in the data frame.
Class<? extends ReaderBuilder>	getReaderBuilderClass() Returns the ReaderBuilder class that can be used to read the data frame

Methods inherited from class java.lang.Object

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

Field Detail

META_FILE_EXTENSION

public static final String META_FILE_EXTENSION

See Also:

Constant Field Values

Constructor Detail

DataFrameMeta

public DataFrameMeta()

DataFrameMeta

public DataFrameMeta(Map<String,Class<? extends DataFrameColumn>> columns,
                     Class<? extends ReaderBuilder> readerBuilderClass,
                     Map<String,String> attributes)

Method Detail

create

public static DataFrameMeta create(DataFrame dataFrame,
                                   Class<? extends ReaderBuilder> readerBuilderClass,
                                   DataWriter dataWriterBuilder)

Creates data frame meta information

Parameters:

dataFrame - source data frame

readerBuilderClass - class of used reader builder

dataWriterBuilder - data writer used

Returns:

data frame meta information

create

public static DataFrameMeta create(DataFrame dataFrame,
                                   Class<? extends ReaderBuilder> readerBuilderClass,
                                   Map<String,String> writerAttributes)

Creates data frame meta information

Parameters:

dataFrame - source data frame

readerBuilderClass - class of used reader builder

writerAttributes - attributes of the used data writer

Returns:

data frame meta information

getReaderBuilderClass

public Class<? extends ReaderBuilder> getReaderBuilderClass()

Returns the ReaderBuilder class that can be used to read the data frame

Returns:

reader builder class

getColumns

public Map<String,Class<? extends DataFrameColumn>> getColumns()

Returns a map of the columns in the data frame. The keys are the names of the columns. Values are the types of the columns

Returns:

column name/type map

getAttributes

public Map<String,String> getAttributes()

Returns the attributes from the data writer used to write the data frame

Returns:

attribute map for reader builder