fr.umlv.tatoo.runtime.lexer
Class DefaultLexerErrorRecoveryPolicy<R,B extends LexerBuffer>

java.lang.Object
  fr.umlv.tatoo.runtime.lexer.DefaultLexerErrorRecoveryPolicy<R,B>

All Implemented Interfaces:

LexerErrorRecoveryPolicy<R,B>

public class DefaultLexerErrorRecoveryPolicy<R,B extends LexerBuffer>
extends Object
implements LexerErrorRecoveryPolicy<R,B>

Constructor Summary

DefaultLexerErrorRecoveryPolicy(ErrorForwarder<B> errorForwarder, LexerWarningReporter<B> warningReporter)

Method Summary

ProcessReturn	continueRecoverOnError(Lexer<B> lexer, ActionProcessor<R> processor) Called when error recovery was initiated by recover on error, and method LexerErrorRecoveryPolicy.errorRecoveryNeedsContinuation() returns true
ProcessReturn	continueRecoverOnUnexpectedEndOfFile(Lexer<B> lexer, ActionProcessor<R> processor) Called when error recovery was initiated by recover on error, and method LexerErrorRecoveryPolicy.unexpectedEndOfFileRecoveryNeedsContinuation() returns true
boolean	errorRecoveryNeedsContinuation() Indicate if LexerErrorRecoveryPolicy.continueRecoverOnError(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor
void	recoverOnError(Lexer<B> lexer, ActionProcessor<R> processor) Called when the impossible match first occurs.
void	recoverOnUnexpectedEndOfFile(Lexer<B> lexer, ActionProcessor<R> processor) Called when the impossible match first occurs at end of input.
boolean	unexpectedEndOfFileRecoveryNeedsContinuation() Indicate if LexerErrorRecoveryPolicy.continueRecoverOnUnexpectedEndOfFile(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultLexerErrorRecoveryPolicy

public DefaultLexerErrorRecoveryPolicy(ErrorForwarder<B> errorForwarder,
                                       LexerWarningReporter<B> warningReporter)

Parameters:

errorForwarder -

warningReporter - may be null.

Method Detail

recoverOnError

public void recoverOnError(Lexer<B> lexer,
                           ActionProcessor<R> processor)

Description copied from interface: LexerErrorRecoveryPolicy

Called when the impossible match first occurs. If necessary, LexerErrorRecoveryPolicy.errorRecoveryNeedsContinuation() returns true and LexerErrorRecoveryPolicy.continueRecoverOnError(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) is called

Specified by:

recoverOnError in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

processor - the action processor

continueRecoverOnError

public ProcessReturn continueRecoverOnError(Lexer<B> lexer,
                                            ActionProcessor<R> processor)

Description copied from interface: LexerErrorRecoveryPolicy

Called when error recovery was initiated by recover on error, and method LexerErrorRecoveryPolicy.errorRecoveryNeedsContinuation() returns true

Specified by:

continueRecoverOnError in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

Parameters:

lexer - the lexer

processor - the action processor

Returns:

MORE if more characters are needed, ERROR, if error recovery fails and TOKEN if a new token is spawned.

errorRecoveryNeedsContinuation

public boolean errorRecoveryNeedsContinuation()

Description copied from interface: LexerErrorRecoveryPolicy

Indicate if LexerErrorRecoveryPolicy.continueRecoverOnError(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor

Specified by:

errorRecoveryNeedsContinuation in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

Returns:

true if LexerErrorRecoveryPolicy.continueRecoverOnError(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor

continueRecoverOnUnexpectedEndOfFile

public ProcessReturn continueRecoverOnUnexpectedEndOfFile(Lexer<B> lexer,
                                                          ActionProcessor<R> processor)

Description copied from interface: LexerErrorRecoveryPolicy

Called when error recovery was initiated by recover on error, and method LexerErrorRecoveryPolicy.unexpectedEndOfFileRecoveryNeedsContinuation() returns true

Specified by:

continueRecoverOnUnexpectedEndOfFile in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

processor - the action processor

Returns:

MORE if more characters are needed, ERROR, if error recovery fails and TOKEN if a new token is spawned.

recoverOnUnexpectedEndOfFile

public void recoverOnUnexpectedEndOfFile(Lexer<B> lexer,
                                         ActionProcessor<R> processor)

Description copied from interface: LexerErrorRecoveryPolicy

Called when the impossible match first occurs at end of input. If necessary, LexerErrorRecoveryPolicy.unexpectedEndOfFileRecoveryNeedsContinuation() returns true and LexerErrorRecoveryPolicy.continueRecoverOnUnexpectedEndOfFile(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) is called

Specified by:

recoverOnUnexpectedEndOfFile in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

processor - the action processor

unexpectedEndOfFileRecoveryNeedsContinuation

public boolean unexpectedEndOfFileRecoveryNeedsContinuation()

Description copied from interface: LexerErrorRecoveryPolicy

Indicate if LexerErrorRecoveryPolicy.continueRecoverOnUnexpectedEndOfFile(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor

Specified by:

unexpectedEndOfFileRecoveryNeedsContinuation in interface LexerErrorRecoveryPolicy<R,B extends LexerBuffer>

Returns:

true if LexerErrorRecoveryPolicy.continueRecoverOnUnexpectedEndOfFile(fr.umlv.tatoo.runtime.lexer.Lexer, fr.umlv.tatoo.runtime.lexer.rules.ActionProcessor) needs to be called by processor