de.erichseifert.gral.io.data

Class CSVReader

java.lang.Object

de.erichseifert.gral.io.IOCapabilitiesStorage

de.erichseifert.gral.io.data.AbstractDataReader

de.erichseifert.gral.io.data.CSVReader

All Implemented Interfaces:

DataReader

public class CSVReader
extends AbstractDataReader

Class that creates a DataSource from file contents which are separated by a certain delimiter character. The delimiter is chosen based on the file type but can also be set manually. By default the comma character will be used as a delimiter for separating columns.

CSVReader instances should be obtained by the DataReaderFactory rather than being created manually:

 DataReaderFactory factory = DataReaderFactory.getInstance();
 DataReader reader = factory.get("text/csv");
 reader.read(new FileInputStream(filename), Integer.class, Double.class);
 

See Also:

RFC 4180

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	SEPARATOR_CHAR Key for specifying a Character value that defines the delimiting character used to separate columns.

Constructor Summary

Constructors

Constructor and Description
CSVReader(java.lang.String mimeType) Creates a new instance with the specified MIME type.

Method Summary

Modifier and Type	Method and Description
DataSource	read(java.io.InputStream input, java.lang.Class<? extends java.lang.Comparable<?>>... types) Returns a DataSource that was imported.

Methods inherited from class de.erichseifert.gral.io.data.AbstractDataReader

getMimeType, getSetting, setSetting

Methods inherited from class de.erichseifert.gral.io.IOCapabilitiesStorage

getCapabilities

Methods inherited from class java.lang.Object

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

Field Detail

SEPARATOR_CHAR

public static final java.lang.String SEPARATOR_CHAR

Key for specifying a Character value that defines the delimiting character used to separate columns.

See Also:

Constant Field Values

Constructor Detail

CSVReader

public CSVReader(java.lang.String mimeType)

Creates a new instance with the specified MIME type. The delimiter is set depending on the MIME type parameter. By default a comma is used as a delimiter.

Parameters:

mimeType - MIME type of the file format to be read.

Method Detail

read

public DataSource read(java.io.InputStream input,
                       java.lang.Class<? extends java.lang.Comparable<?>>... types)
                throws java.io.IOException

Returns a DataSource that was imported.

Parameters:

input - Input to be read.

types - Number types for the columns of the DataSource.

Returns:

DataSource Imported data.

Throws:

java.io.IOException - when the file format is not valid or when experiencing an error during file operations.