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) final org.antlr.v4.runtime.CharStream
    stream
     
    (package private) final 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 Details

    • stream

      final org.antlr.v4.runtime.CharStream stream

    • upper

      final boolean upper

  • Constructor Details

    • 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 Details

    • 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