scanner (abc4j API Documentation)

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abc4j API Specification

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Package scanner

This package contains classes for scanners needed for syntax analysis : a scanner is in charge of retrieving tokens from an input stream.

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Description

Interface Summary
PositionableInCharStream	Interface that should be implemented by any object that has a position in a char stream.
ScannerListenerInterface	This interface should be implemented by any object that wants to listen to scanner events thrown during characters stream scanning.
TokenType	Tokens types add semantic to tokens to diferenciate them.

Class Summary
AutomataDefinition	This class enables the description of automatas.
CharStreamPosition	This class defines positions in a stream of characters.
FinaleStateAutomata	This class defines finale state automatas.
InvalidCharacterEvent	This event is thrown when an unexpected character is encountered.
IsAlphaTransition	This class defines a transition that corresponds to any alpha character : a letter, upper or lower case.
IsDigitTransition	This class defines a transition that corresponds to a digit character.
Scanner	A scanner is able to separate tokens from an input stream, following states defined in a finale state automata.
ScannerAdapter	An empty default implementation of for scanner listener.
Set	This class defines sets used to group token types while parsing.
State	This class defines states used in finale state automata.
Token	Tokens are objects created by a `scanner` while scanning a stream of characters.
TokenEvent	This event is thrown when a new token has been detected.
Transition	This class defines transitions between states that are used for defining finale state automatas.

Exception Summary
NoSuchTokenException	A runtime exception thrown when no more token can be generated.
NoTransitionFoundException	A runtime exception thrown when no transition is found when sending a character in a finale state automata.

Package scanner Description

This package contains classes for scanners needed for syntax analysis : a scanner is in charge of retrieving tokens from an input stream. The rules used to know how to retrieve tokens are defined by finale states automatas.