de.lmu.ifi.dbs.elki.datasource.parser

Class CSVReaderFormat

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.parser.CSVReaderFormat

public class CSVReaderFormat
extends java.lang.Object

Basic format factory for parsing CSV-like formats. To read CSV files into ELKI, see NumberVectorLabelParser. This class encapsulates csv format settings, that need to be parsed in multiple places from ELKI, not only on input vector files.

Since:

0.1

Author:

Arthur Zimek, Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CSVReaderFormat.Parameterizer Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ATTRIBUTE_CONCATENATION A sign to separate attributes.
protected java.util.regex.Pattern	colSep Stores the column separator pattern
protected java.util.regex.Pattern	comment Comment pattern.
static java.lang.String	COMMENT_PATTERN Default pattern for comments.
static CSVReaderFormat	DEFAULT_FORMAT Default CSV input format.
static java.lang.String	DEFAULT_SEPARATOR A pattern defining whitespace.
static java.lang.String	NUMBER_PATTERN A pattern catching most numbers that can be parsed using Double.parseDouble: Some examples: 1 1.
static java.lang.String	QUOTE_CHARS A quote pattern
protected java.lang.String	quoteChars Stores the quotation character

Constructor Summary

Constructors

Constructor and Description
CSVReaderFormat(java.util.regex.Pattern colSep, java.lang.String quoteChars, java.util.regex.Pattern comment) Constructor.

Method Summary

Modifier and Type	Method and Description
TokenizedReader	makeReader() Make a reader for the configured format.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SEPARATOR

public static final java.lang.String DEFAULT_SEPARATOR

A pattern defining whitespace.

See Also:

Constant Field Values

QUOTE_CHARS

public static final java.lang.String QUOTE_CHARS

A quote pattern

See Also:

Constant Field Values

NUMBER_PATTERN

public static final java.lang.String NUMBER_PATTERN

A pattern catching most numbers that can be parsed using Double.parseDouble: Some examples: 1 1. 1.2 .2 -.2e-03

See Also:

Constant Field Values

COMMENT_PATTERN

public static final java.lang.String COMMENT_PATTERN

Default pattern for comments.

See Also:

Constant Field Values

ATTRIBUTE_CONCATENATION

public static final java.lang.String ATTRIBUTE_CONCATENATION

A sign to separate attributes.

See Also:

Constant Field Values

DEFAULT_FORMAT

public static final CSVReaderFormat DEFAULT_FORMAT

Default CSV input format.

colSep

protected java.util.regex.Pattern colSep

Stores the column separator pattern

quoteChars

protected java.lang.String quoteChars

Stores the quotation character

comment

protected java.util.regex.Pattern comment

Comment pattern.

Constructor Detail

CSVReaderFormat

public CSVReaderFormat(java.util.regex.Pattern colSep,
                       java.lang.String quoteChars,
                       java.util.regex.Pattern comment)

Constructor.

Parameters:

colSep - Column separator

quoteChars - Quote character

comment - Comment pattern

Method Detail

makeReader

public TokenizedReader makeReader()

Make a reader for the configured format.

Returns:

A tokenized reader for this format.