Package org.apache.uima.internal.util

Class CharacterUtils

java.lang.Object

org.apache.uima.internal.util.CharacterUtils

public class CharacterUtils
extends Object

Collection of utilities for character handling. Contains utilities for semi-automatically creating lexer rules.

Constructor Summary

Constructors

Constructor	Description
CharacterUtils()	Constructor for CharacterUtils.

Method Summary

Modifier and Type	Method	Description
static ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange>	getDigitRange()	Generate an ArrayList of CharRanges for what Java considers to be a digit.
static ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange>	getLetterRange()	Generate an ArrayList of CharRanges for what Java considers to be a letter.
static void	main(String[] args)
static void	printAntlrLexRule(String name, ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> charRanges)
static void	printJavaCCLexRule(String name, ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> charRanges)
static String	toHexString(char c)	Create a hex representation of the UTF-16 encoding of a Java char.
static String	toUnicodeChar(char c)	Create a hex representation of the UTF-16 encoding of a Java char.

Methods inherited from class java.lang.Object

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

Constructor Detail

CharacterUtils

public CharacterUtils()

Constructor for CharacterUtils.

Method Detail

toUnicodeChar

public static String toUnicodeChar(char c)

Create a hex representation of the UTF-16 encoding of a Java char. This is the representation that's understood by Java when reading source code.

Parameters:

c - The char to be encoded.

Returns:

String Hex representation of character. For example, the result of encoding 'A' would be "A".

toHexString

public static String toHexString(char c)

Create a hex representation of the UTF-16 encoding of a Java char. This is the representation that's understood by the JavaCC lexer.

Parameters:

c - The char to be encoded.

Returns:

String Hex representation of character. For example, the result of encoding 'A' would be "0x0041".

getLetterRange

public static ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> getLetterRange()

Generate an ArrayList of CharRanges for what Java considers to be a letter. I use this as input to Unicode agnostic lexers like ANTLR.

Returns:

ArrayList A list of character ranges.

getDigitRange

public static ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> getDigitRange()

Generate an ArrayList of CharRanges for what Java considers to be a digit. I use this as input to Unicode agnostic lexers like ANTLR.

Returns:

ArrayList A list of character ranges.

printAntlrLexRule

public static void printAntlrLexRule(String name,
                                     ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> charRanges)

printJavaCCLexRule

public static void printJavaCCLexRule(String name,
                                      ArrayList<org.apache.uima.internal.util.CharacterUtils.CharRange> charRanges)

main

public static void main(String[] args)