Package it.unimi.di.big.mg4j.query.parser

Class TokenMgrError

java.lang.Object

java.lang.Throwable

java.lang.Error

it.unimi.di.big.mg4j.query.parser.TokenMgrError

All Implemented Interfaces:

Serializable

public class TokenMgrError
extends Error

Token Manager Error.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	INVALID_LEXICAL_STATE	Tried to change to an invalid lexical state.
static int	LEXICAL_ERROR	Lexical error occurred.
static int	LOOP_DETECTED	Detected (and bailed out of) an infinite loop in the token manager.
static int	STATIC_LEXER_ERROR	An attempt was made to create a second instance of a static token manager.

Constructor Summary

Constructors

Constructor	Description
TokenMgrError()	No arg constructor.
TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, int curChar, int reason)	Full Constructor.
TokenMgrError(String message, int reason)	Constructor with message and reason.

Method Summary

Modifier and Type	Method	Description
protected static String	addEscapes(String str)	Replaces unprintable characters by their escaped (or unicode escaped) equivalents in the given string
String	getMessage()	You can also modify the body of this method to customize your error messages.
protected static String	LexicalErr(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, int curChar)	Returns a detailed message for the Error when it is thrown by the token manager to indicate a lexical error.

Methods inherited from class java.lang.Throwable

addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Field Detail

LEXICAL_ERROR

public static final int LEXICAL_ERROR

Lexical error occurred.

See Also:

Constant Field Values

STATIC_LEXER_ERROR

public static final int STATIC_LEXER_ERROR

An attempt was made to create a second instance of a static token manager.

See Also:

Constant Field Values

INVALID_LEXICAL_STATE

public static final int INVALID_LEXICAL_STATE

Tried to change to an invalid lexical state.

See Also:

Constant Field Values

LOOP_DETECTED

public static final int LOOP_DETECTED

Detected (and bailed out of) an infinite loop in the token manager.

See Also:

Constant Field Values

Constructor Detail

TokenMgrError

public TokenMgrError()

No arg constructor.

TokenMgrError

public TokenMgrError(String message,
                     int reason)

Constructor with message and reason.

TokenMgrError

public TokenMgrError(boolean EOFSeen,
                     int lexState,
                     int errorLine,
                     int errorColumn,
                     String errorAfter,
                     int curChar,
                     int reason)

Full Constructor.

Method Detail

addEscapes

protected static final String addEscapes(String str)

Replaces unprintable characters by their escaped (or unicode escaped) equivalents in the given string

LexicalErr

protected static String LexicalErr(boolean EOFSeen,
                                   int lexState,
                                   int errorLine,
                                   int errorColumn,
                                   String errorAfter,
                                   int curChar)

Returns a detailed message for the Error when it is thrown by the token manager to indicate a lexical error. Parameters : EOFSeen : indicates if EOF caused the lexical error curLexState : lexical state in which this error occurred errorLine : line number when the error occurred errorColumn : column number when the error occurred errorAfter : prefix that was seen before this error occurred curchar : the offending character Note: You can customize the lexical error message by modifying this method.

getMessage

public String getMessage()

You can also modify the body of this method to customize your error messages. For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not of end-users concern, so you can return something like : "Internal Error : Please file a bug report .... " from this method for such cases in the release version of your parser.

Overrides:

getMessage in class Throwable