Package io.debezium.antlr

Class CaseChangingCharStream

java.lang.Object

io.debezium.antlr.CaseChangingCharStream

All Implemented Interfaces:

org.antlr.v4.runtime.CharStream, org.antlr.v4.runtime.IntStream

public class CaseChangingCharStream
extends Object
implements org.antlr.v4.runtime.CharStream

https://github.com/parrt/antlr4/blob/case-insensitivity-doc/doc/resources/CaseChangingCharStream.java

This class supports case-insensitive lexing by wrapping an existing CharStream and forcing the lexer to see either upper or lowercase characters. Grammar literals should then be either upper or lower case such as 'BEGIN' or 'begin'. The text of the character stream is unaffected. Example: input 'BeGiN' would match lexer rule 'BEGIN' if constructor parameter upper=true but getText() would return 'BeGiN'.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) org.antlr.v4.runtime.CharStream	stream
(package private) boolean	upper

Fields inherited from interface org.antlr.v4.runtime.IntStream

EOF, UNKNOWN_SOURCE_NAME

Constructor Summary

Constructors

Constructor	Description
CaseChangingCharStream(org.antlr.v4.runtime.CharStream stream, boolean upper)	Constructs a new CaseChangingCharStream wrapping the given CharStream forcing all characters to upper case or lower case.

Method Summary

Modifier and Type	Method	Description
void	consume()
String	getSourceName()
String	getText(org.antlr.v4.runtime.misc.Interval interval)
int	index()
int	LA(int i)
int	mark()
void	release(int marker)
void	seek(int index)
int	size()

Methods inherited from class java.lang.Object

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

Field Detail

stream

final org.antlr.v4.runtime.CharStream stream

upper

final boolean upper

Constructor Detail

CaseChangingCharStream

public CaseChangingCharStream(org.antlr.v4.runtime.CharStream stream,
                              boolean upper)

Constructs a new CaseChangingCharStream wrapping the given CharStream forcing all characters to upper case or lower case.

Parameters:

stream - The stream to wrap.

upper - If true force each symbol to upper case, otherwise force to lower.

Method Detail

getText

public String getText(org.antlr.v4.runtime.misc.Interval interval)

Specified by:

getText in interface org.antlr.v4.runtime.CharStream

consume

public void consume()

Specified by:

consume in interface org.antlr.v4.runtime.IntStream

LA

public int LA(int i)

Specified by:

LA in interface org.antlr.v4.runtime.IntStream

mark

public int mark()

Specified by:

mark in interface org.antlr.v4.runtime.IntStream

release

public void release(int marker)

Specified by:

release in interface org.antlr.v4.runtime.IntStream

index

public int index()

Specified by:

index in interface org.antlr.v4.runtime.IntStream

seek

public void seek(int index)

Specified by:

seek in interface org.antlr.v4.runtime.IntStream

size

public int size()

Specified by:

size in interface org.antlr.v4.runtime.IntStream

getSourceName

public String getSourceName()

Specified by:

getSourceName in interface org.antlr.v4.runtime.IntStream