fr.umlv.tatoo.runtime.lexer.rules
Class ActionProcessor<R>

java.lang.Object
  fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor<R>

Type Parameters:

R - type of rules.

public class ActionProcessor<R>
extends Object

Author:

Julien

Constructor Summary

ActionProcessor(LexerTable<R> lexerTable)
Creates a new lexer process.

Method Summary

LexerTable<R>	getLexerTable() Returns the rule tables for this process
void	reset() Reset the action processor.
ProcessReturn	step(LexerBuffer buffer, Iterable<? extends R> rules) Processes available characters from the input stream.
ProcessReturn	stepClose() This method is called after step(fr.umlv.tatoo.runtime.buffer.LexerBuffer, java.lang.Iterable) has returned MORE and end-of-file is reached
int	tokenLength() Returns the token length, upon successful analyze.
R	winningRule() Returns the rule that matched, upon successful analyze.

Methods inherited from class java.lang.Object

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

Constructor Detail

ActionProcessor

public ActionProcessor(LexerTable<R> lexerTable)

Creates a new lexer process.

Parameters:

lexerTable - the rule tables for this process

Method Detail

reset

public void reset()

Reset the action processor.

step

public ProcessReturn step(LexerBuffer buffer,
                          Iterable<? extends R> rules)

Processes available characters from the input stream.

Parameters:

buffer - the lexer buffer.

Returns:

MORE if more characters are needed to perform the match, ERROR, if an error occurred and TOKEN if a new token is spawned.

stepClose

public ProcessReturn stepClose()

This method is called after step(fr.umlv.tatoo.runtime.buffer.LexerBuffer, java.lang.Iterable) has returned MORE and end-of-file is reached

Returns:

NOTHING if no new token is available, ERROR, if an error occurred and TOKEN if a new token is spawned. In this case; if characters are back available in the buffer, step(fr.umlv.tatoo.runtime.buffer.LexerBuffer, java.lang.Iterable) must be called again until it returns MORE, and then this method has to be called again

winningRule

public R winningRule()

Returns the rule that matched, upon successful analyze. This method must be called only after method step(fr.umlv.tatoo.runtime.buffer.LexerBuffer, java.lang.Iterable) or stepClose() has returned ProcessReturn.TOKEN

Returns:

the rule that matched

tokenLength

public int tokenLength()

Returns the token length, upon successful analyze. This method must be called only after method step(fr.umlv.tatoo.runtime.buffer.LexerBuffer, java.lang.Iterable) or stepClose() has returned ProcessReturn.TOKEN

Returns:

the token length

getLexerTable

public LexerTable<R> getLexerTable()

Returns the rule tables for this process

Returns:

the rule tables for this process