de.unknownreality.dataframe

Class DataFrameLoader

java.lang.Object

de.unknownreality.dataframe.DataFrameLoader

public class DataFrameLoader
extends Object

Created by Alex on 08.06.2016.

Method Summary

Modifier and Type	Method and Description
static DataFrame	fromCSV(byte[] bytes, char separator, boolean header) Loads a data frame from a byte array using the CSV format (CSVFormat).
static DataFrame	fromCSV(byte[] bytes, char separator, String headerPrefix) Loads a data frame from a byte array using the CSV format (CSVFormat).
static DataFrame	fromCSV(File file, char separator, boolean header) Loads a data frame from a file using the CSV format (CSVFormat).
static DataFrame	fromCSV(File file, char separator, String headerPrefix) Loads a data frame from a file string using the CSV format (CSVFormat).
static DataFrame	fromCSV(InputStream is, char separator, boolean header) Loads a data frame from a InputStream using the CSV format (CSVFormat).
static DataFrame	fromCSV(InputStream is, char separator, String headerPrefix) Loads a data frame from a InputStream using the CSV format (CSVFormat).
static DataFrame	fromCSV(Reader r, char separator, boolean header) Loads a data frame from a Reader using the CSV format (CSVFormat).
static DataFrame	fromCSV(Reader r, char separator, String headerPrefix) Loads a data frame from a Reader using the CSV format (CSVFormat).
static DataFrame	fromCSV(String content, char separator, boolean header) Loads a data frame from a content string using the CSV format (CSVFormat).
static DataFrame	fromCSV(String content, char separator, String headerPrefix) Loads a data frame from a content string using the CSV format (CSVFormat).
static DataFrame	fromCSV(String resource, ClassLoader classLoader, char separator, boolean header) Loads a data frame from a URL array using the CSV format (CSVFormat).
static DataFrame	fromCSV(String resource, ClassLoader classLoader, char separator, String headerPrefix) Loads a data frame from a resource using the CSV format (CSVFormat).
static DataFrame	fromCSV(URL url, char separator, boolean header) Loads a data frame from a URL array using the CSV format (CSVFormat).
static DataFrame	fromCSV(URL url, char separator, String headerPrefix) Loads a data frame from a url using the CSV format (CSVFormat).
static DataFrame	load(byte[] bytes) Loads a data frame from a byte array using the default tab separated format (TSVFormat).
static DataFrame	load(byte[] bytes, DataReader reader) Loads a data frame from a byte array using a specified DataReader
static DataFrame	load(byte[] bytes, ReadFormat readFormat) Loads a data frame from a byte array using a specified ReadFormat.
static DataFrame	load(DataIterator<?> dataIterator) Loads a data frame from a DataIterator
static DataFrame	load(DataIterator<?> dataIterator, FilterPredicate predicate) Loads a data frame from a DataIterator and filters all rows using a specified predicate
static DataFrame	load(File file) Loads a data frame from a file.
static DataFrame	load(File file, DataReader reader) Loads a data frame from a file using a specified DataReader
static DataFrame	load(File file, File metaFile) Loads a data frame from a file and the corresponding meta file.
static DataFrame	load(File file, File metaFile, FilterPredicate filterPredicate) Loads a data frame from a file and the corresponding meta file.
static DataFrame	load(File file, FilterPredicate filterPredicate) Loads a data frame from a file.
static DataFrame	load(File file, ReadFormat readFormat) Loads a data frame from a file using a specified ReadFormat.
static DataFrame	load(InputStream is) Loads a data frame from a InputStream using the default tab separated format (TSVFormat).
static DataFrame	load(InputStream is, DataReader reader) Loads a data frame from a InputStream using a specified DataReader
static DataFrame	load(InputStream is, ReadFormat readFormat) Loads a data frame from a InputStream using a specified ReadFormat.
static DataFrame	load(Reader reader) Loads a data frame from a Reader using the default tab separated format (TSVFormat).
static DataFrame	load(Reader r, DataReader reader) Loads a data frame from a Reader using a specified DataReader
static DataFrame	load(Reader r, ReadFormat readFormat) Loads a data frame from a Reader using a specified ReadFormat.
static DataFrame	load(String content) Loads a data frame from a content string using the default tab separated format (TSVFormat).
static DataFrame	load(String resource, ClassLoader classLoader) Loads a data frame from a resource using the default tab separated format (TSVFormat).
static DataFrame	load(String resource, ClassLoader classLoader, DataReader reader) Loads a data frame from a resource using a specified DataReader
static DataFrame	load(String resource, ClassLoader classLoader, ReadFormat readFormat) Loads a data frame from a resource using a specified ReadFormat
static DataFrame	load(String content, DataReader reader) Loads a data frame from a content String using a specified DataReader
static DataFrame	load(String content, ReadFormat readFormat) Loads a data frame from a content String using a specified ReadFormat.
static DataFrame	load(URL url) Loads a data frame from a URL using the default tab separated format (TSVFormat).
static DataFrame	load(URL url, DataReader reader) Loads a data frame from a URL using a specified DataReader
static DataFrame	load(URL url, ReadFormat readFormat) Loads a data frame from a URL array using a specified ReadFormat.
static DataFrame	loadResource(String path, String metaPath, ClassLoader classLoader) Loads a data frame from a resource and the corresponding meta resource.
static DataFrame	loadResource(String path, String metaPath, ClassLoader classLoader, FilterPredicate filterPredicate) Loads a data frame from a resource and the corresponding meta resource.

Methods inherited from class java.lang.Object

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

Method Detail

fromCSV

public static DataFrame fromCSV(File file,
                                char separator,
                                String headerPrefix)

Loads a data frame from a file string using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

file - input file

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(String content,
                                char separator,
                                String headerPrefix)

Loads a data frame from a content string using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

content - content string

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(String resource,
                                ClassLoader classLoader,
                                char separator,
                                String headerPrefix)

Loads a data frame from a resource using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

resource - resource path

classLoader - class loader used to find the resource

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(URL url,
                                char separator,
                                String headerPrefix)

Loads a data frame from a url using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

url - input url

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(byte[] bytes,
                                char separator,
                                String headerPrefix)

Loads a data frame from a byte array using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

bytes - input byte array

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(InputStream is,
                                char separator,
                                String headerPrefix)

Loads a data frame from a InputStream using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

is - input stream

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(Reader r,
                                char separator,
                                String headerPrefix)

Loads a data frame from a Reader using the CSV format (CSVFormat). The column separator can be specified. If the header starts with a certain prefix it can be specified, otherwise the prefix should be set to "" or null

Parameters:

r - input reader

separator - column separator

headerPrefix - header prefix

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(File file,
                                char separator,
                                boolean header)

Loads a data frame from a file using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

file - input file

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(String content,
                                char separator,
                                boolean header)

Loads a data frame from a content string using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

content - content string

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(String resource,
                                ClassLoader classLoader,
                                char separator,
                                boolean header)

Loads a data frame from a URL array using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

resource - resource path

classLoader - class loader used to find the resource

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(URL url,
                                char separator,
                                boolean header)

Loads a data frame from a URL array using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

url - input url

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(byte[] bytes,
                                char separator,
                                boolean header)

Loads a data frame from a byte array using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

bytes - input byte array

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(InputStream is,
                                char separator,
                                boolean header)

Loads a data frame from a InputStream using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

is - input stream

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

fromCSV

public static DataFrame fromCSV(Reader r,
                                char separator,
                                boolean header)

Loads a data frame from a Reader using the CSV format (CSVFormat). The column separator can be specified. If the CSV contains no header, the columns are named V1, V2,...

Parameters:

r - input reader

separator - column separator

header - specifies wether the csv contains a header or not

Returns:

resulting dataframe

load

public static DataFrame load(String content)

Loads a data frame from a content string using the default tab separated format (TSVFormat).

Parameters:

content - content string

Returns:

resulting dataframe

load

public static DataFrame load(String resource,
                             ClassLoader classLoader)

Loads a data frame from a resource using the default tab separated format (TSVFormat).

Parameters:

resource - resource path

classLoader - class loader used to find the resource

Returns:

resulting dataframe

load

public static DataFrame load(URL url)

Loads a data frame from a URL using the default tab separated format (TSVFormat).

Parameters:

url - input url

Returns:

resulting dataframe

load

public static DataFrame load(byte[] bytes)

Loads a data frame from a byte array using the default tab separated format (TSVFormat).

Parameters:

bytes - input byte array

Returns:

resulting dataframe

load

public static DataFrame load(InputStream is)

Loads a data frame from a InputStream using the default tab separated format (TSVFormat).

Parameters:

is - input stream

Returns:

resulting dataframe

load

public static DataFrame load(Reader reader)

Loads a data frame from a Reader using the default tab separated format (TSVFormat).

Parameters:

reader - input reader

Returns:

resulting dataframe

load

public static DataFrame load(File file,
                             ReadFormat readFormat)

Loads a data frame from a file using a specified ReadFormat.

Parameters:

file - input file

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(String content,
                             ReadFormat readFormat)

Loads a data frame from a content String using a specified ReadFormat.

Parameters:

content - content string

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(String resource,
                             ClassLoader classLoader,
                             ReadFormat readFormat)

Loads a data frame from a resource using a specified ReadFormat

Parameters:

resource - resource path

classLoader - ClassLoader used to find the resource

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(URL url,
                             ReadFormat readFormat)

Loads a data frame from a URL array using a specified ReadFormat.

Parameters:

url - input url

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(byte[] bytes,
                             ReadFormat readFormat)

Loads a data frame from a byte array using a specified ReadFormat.

Parameters:

bytes - input byte array

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(InputStream is,
                             ReadFormat readFormat)

Loads a data frame from a InputStream using a specified ReadFormat.

Parameters:

is - input stream

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(Reader r,
                             ReadFormat readFormat)

Loads a data frame from a Reader using a specified ReadFormat.

Parameters:

r - input reader

readFormat - read format

Returns:

resulting dataframe

load

public static DataFrame load(File file,
                             DataReader reader)

Loads a data frame from a file using a specified DataReader

Parameters:

file - input file

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(String content,
                             DataReader reader)

Loads a data frame from a content String using a specified DataReader

Parameters:

content - content string

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(String resource,
                             ClassLoader classLoader,
                             DataReader reader)

Loads a data frame from a resource using a specified DataReader

Parameters:

resource - resource path

classLoader - ClassLoader used to find the resource

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(URL url,
                             DataReader reader)

Loads a data frame from a URL using a specified DataReader

Parameters:

url - input url

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(byte[] bytes,
                             DataReader reader)

Loads a data frame from a byte array using a specified DataReader

Parameters:

bytes - input byte array

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(InputStream is,
                             DataReader reader)

Loads a data frame from a InputStream using a specified DataReader

Parameters:

is - input

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(Reader r,
                             DataReader reader)

Loads a data frame from a Reader using a specified DataReader

Parameters:

r - input reader

reader - data reader

Returns:

resulting dataframe

load

public static DataFrame load(DataIterator<?> dataIterator)

Loads a data frame from a DataIterator

Parameters:

dataIterator - data iterator

Returns:

resulting dataframe

load

public static DataFrame load(DataIterator<?> dataIterator,
                             FilterPredicate predicate)

Loads a data frame from a DataIterator and filters all rows using a specified predicate

Parameters:

dataIterator - data iterator

predicate - filter predicate

Returns:

resulting dataframe

load

public static DataFrame load(File file,
                             FilterPredicate filterPredicate)

Loads a data frame from a file. The matching data frame meta file must be present. Only rows validated by the filter are appended to the resulting data frame file+'.dfm'

Parameters:

file - data frame file

filterPredicate - row filter

Returns:

loaded data frame

load

public static DataFrame load(File file)

Loads a data frame from a file. The matching data frame meta file must be present. file+'.dfm'

Parameters:

file - data frame file

Returns:

loaded data frame

load

public static DataFrame load(File file,
                             File metaFile,
                             FilterPredicate filterPredicate)

Loads a data frame from a file and the corresponding meta file. Only rows validated by the filter are appended to the resulting data frame

Parameters:

file - data frame file

metaFile - data frame meta file

filterPredicate - row filter

Returns:

loaded data frame

load

public static DataFrame load(File file,
                             File metaFile)

Loads a data frame from a file and the corresponding meta file.

Parameters:

file - data frame file

metaFile - data frame meta file

Returns:

loaded data frame

loadResource

public static DataFrame loadResource(String path,
                                     String metaPath,
                                     ClassLoader classLoader,
                                     FilterPredicate filterPredicate)

Loads a data frame from a resource and the corresponding meta resource. Only rows validated by the filter are appended to the resulting data frame

Parameters:

path - path to data frame resource

metaPath - path to meta file resoure

classLoader - class loader for the resource

filterPredicate - row filter

Returns:

loaded data frame

loadResource

public static DataFrame loadResource(String path,
                                     String metaPath,
                                     ClassLoader classLoader)

Loads a data frame from a resource and the corresponding meta resource.

Parameters:

path - path to data frame resource

metaPath - path to meta file resoure

classLoader - class loader for the resource

Returns:

loaded data frame