me.jaimegarza.syntax.model.graph.symbol

Class RegexSymbol

java.lang.Object

me.jaimegarza.syntax.model.graph.symbol.RegexSymbol

Direct Known Subclasses:

AnyCharacter, Character, CharacterClass, Epsilon

public abstract class RegexSymbol
extends Object

A regular expression symbol. Abstract.

Author:

jgarza

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	ANY_CODE
protected static int	CHAR_CODE
protected static int	CHARACTER_CLASS_CODE
protected static int	EPSILON_CODE
protected static int	HASH_ANY
protected static int	HASH_EPSILON

Constructor Summary

Constructors

Constructor and Description
RegexSymbol()

Method Summary

Modifier and Type	Method and Description
abstract String	canonical() A string representation of this symbol
abstract int	code() When written to the output stream, each symbol has a separate code
abstract int[]	getCodeArray()
abstract boolean	isEpsilon() Is the symbol an ε symbol?
abstract boolean	matches(char c) Does a character matches a symbol?
abstract int	sizeof() What is the size of this object in the edge table?
abstract String	toHtmlString()

Methods inherited from class java.lang.Object

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

Field Detail

HASH_EPSILON

protected static final int HASH_EPSILON

See Also:

Constant Field Values

HASH_ANY

protected static final int HASH_ANY

See Also:

Constant Field Values

ANY_CODE

protected static final int ANY_CODE

See Also:

Constant Field Values

CHAR_CODE

protected static final int CHAR_CODE

See Also:

Constant Field Values

CHARACTER_CLASS_CODE

protected static final int CHARACTER_CLASS_CODE

See Also:

Constant Field Values

EPSILON_CODE

protected static final int EPSILON_CODE

See Also:

Constant Field Values

Constructor Detail

RegexSymbol

public RegexSymbol()

Method Detail

isEpsilon

public abstract boolean isEpsilon()

Is the symbol an ε symbol?

Returns:

true if it is so

canonical

public abstract String canonical()

A string representation of this symbol

Returns:

a simple representation of the symbol

matches

public abstract boolean matches(char c)

Does a character matches a symbol?

Parameters:

c - the character

Returns:

true if it matches

code

public abstract int code()

When written to the output stream, each symbol has a separate code

Returns:

the code for this symbol

sizeof

public abstract int sizeof()

What is the size of this object in the edge table?

Returns:

the number of integer objects

getCodeArray

public abstract int[] getCodeArray()

Returns:

the array of strings to be written to the edge table

toHtmlString

public abstract String toHtmlString()

Returns:

a string suitable for Html