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

java.lang.Object
  de.lmu.ifi.dbs.elki.datasource.parser.AbstractParser

Direct Known Subclasses:

BitVectorLabelParser, NumberDistanceParser, NumberVectorLabelParser, ParameterizationFunctionLabelParser, SimplePolygonParser, SparseBitVectorLabelParser

public abstract class AbstractParser
extends Object

Abstract superclass for all parsers providing the option handler for handling options.

Nested Class Summary

static class

AbstractParser.Parameterizer Parameterization class.

Field Summary

static String	ATTRIBUTE_CONCATENATION A sign to separate attributes.
private Pattern	colSep Stores the column separator pattern
static OptionID	COLUMN_SEPARATOR_ID OptionID for the column separator parameter (defaults to whitespace as in WHITESPACE_PATTERN.
static String	COMMENT The comment character.
static String	NUMBER_PATTERN A pattern catching most numbers that can be parsed using Double.valueOf: Some examples: 1 1.
static String	QUOTE_CHAR A quote pattern
static OptionID	QUOTE_ID OptionID for the quote character parameter (defaults to a double quotation mark as in QUOTE_CHAR.
protected char	quoteChar Stores the quotation character
static String	WHITESPACE_PATTERN A pattern defining whitespace.

Constructor Summary

AbstractParser(Pattern colSep, char quoteChar)
Constructor.

Method Summary

protected abstract Logging	getLogger() Get the logger for this class.
protected List<String>	tokenize(String input) Tokenize a string.
String	toString() Returns a string representation of the object.

Methods inherited from class java.lang.Object

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

Field Detail

WHITESPACE_PATTERN

public static final String WHITESPACE_PATTERN

A pattern defining whitespace.

See Also:

Constant Field Values

QUOTE_CHAR

public static final String QUOTE_CHAR

A quote pattern

See Also:

Constant Field Values

NUMBER_PATTERN

public static final String NUMBER_PATTERN

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

See Also:

Constant Field Values

COLUMN_SEPARATOR_ID

public static final OptionID COLUMN_SEPARATOR_ID

OptionID for the column separator parameter (defaults to whitespace as in WHITESPACE_PATTERN.

QUOTE_ID

public static final OptionID QUOTE_ID

OptionID for the quote character parameter (defaults to a double quotation mark as in QUOTE_CHAR.

colSep

private Pattern colSep

Stores the column separator pattern

quoteChar

protected char quoteChar

Stores the quotation character

COMMENT

public static final String COMMENT

The comment character.

See Also:

Constant Field Values

ATTRIBUTE_CONCATENATION

public static final String ATTRIBUTE_CONCATENATION

A sign to separate attributes.

See Also:

Constant Field Values

Constructor Detail

AbstractParser

public AbstractParser(Pattern colSep,
                      char quoteChar)

Constructor.

Parameters:

colSep - Column separator

quoteChar - Quote character

Method Detail

tokenize

protected List<String> tokenize(String input)

Tokenize a string. Works much like colSep.split() except it honors quotation characters.

Parameters:

input - Input string

Returns:

Tokenized string

getLogger

protected abstract Logging getLogger()

Get the logger for this class.

Returns:

Logger.

toString

public String toString()

Returns a string representation of the object.

Overrides:

toString in class Object

Returns:

a string representation of the object.