Package org.ejml.ops

Class ReadCsv

java.lang.Object

org.ejml.ops.ReadCsv

Direct Known Subclasses:

ReadMatrixCsv

public class ReadCsv
extends Object

Base class for reading CSV formatted files. CSV stands for column-space-value where text strings are separated by a space character. The values are typically stored in a human readable format. The encoded text for a single variable is referred to as a word.

Comments are allowed and identified by starting a line with the comment character. The comment character is user configurable. By default there is no comment character.

Constructor Summary

Constructors

Constructor	Description
ReadCsv(InputStream in)	Constructor for ReadCsv

Method Summary

Modifier and Type	Method	Description
protected @Nullable List<String>	extractWords()	Finds the next valid line of words in the stream and extracts them.
int	getLineNumber()	Returns how many lines have been read.
BufferedReader	getReader()	Returns the reader that it is using internally.
static boolean	isSpace(char c)	Checks to see if 'c' is a space character or not.
protected List<String>	parseWords(String line)	Extracts the words from a string.
void	setComment(char comment)	Sets the comment character.

Methods inherited from class java.lang.Object

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

Constructor Details

ReadCsv

public ReadCsv(InputStream in)

Constructor for ReadCsv

Parameters:

in - Where the input comes from.

Method Details

setComment

public void setComment(char comment)

Sets the comment character. All lines that start with this character will be ignored.

Parameters:

comment - The new comment character.

getLineNumber

public int getLineNumber()

Returns how many lines have been read.

Returns:

Line number

getReader

public BufferedReader getReader()

Returns the reader that it is using internally.

Returns:

The reader.

extractWords

@Nullable
protected @Nullable List<String> extractWords()
                                       throws IOException

Finds the next valid line of words in the stream and extracts them.

Returns:

List of valid words on the line. null if the end of the file has been reached.

Throws:

IOException

parseWords

protected List<String> parseWords(String line)

Extracts the words from a string. Words are seperated by a space character.

Parameters:

line - The line that is being parsed.

Returns:

A list of words contained on the line.

isSpace

public static boolean isSpace(char c)

Checks to see if 'c' is a space character or not.

Parameters:

c - The character being tested.

Returns:

if it is a space character or not.