Class OctalUnescaper

java.lang.Object
org.apache.commons.text.translate.CharSequenceTranslator
org.apache.commons.text.translate.OctalUnescaper

public class OctalUnescaper extends CharSequenceTranslator
Translate escaped octal Strings back to their octal values. For example, "\45" should go back to being the specific value (a %). Note that this currently only supports the viable range of octal for Java; namely 1 to 377. This is because parsing Java is the main use case.
Since:
1.0
  • Constructor Details

    • OctalUnescaper

      public OctalUnescaper()
  • Method Details

    • isOctalDigit

      private boolean isOctalDigit(char ch)
      Tests if the given char is an octal digit. Octal digits are the character representations of the digits 0 to 7.
      Parameters:
      ch - the char to check
      Returns:
      true if the given char is the character representation of one of the digits from 0 to 7
    • isZeroToThree

      private boolean isZeroToThree(char ch)
      Tests if the given char is the character representation of one of the digit from 0 to 3.
      Parameters:
      ch - the char to check
      Returns:
      true if the given char is the character representation of one of the digits from 0 to 3
    • translate

      public int translate(CharSequence input, int index, Writer writer) throws IOException
      Translate a set of code points, represented by an int index into a CharSequence, into another set of code points. The number of code points consumed must be returned, and the only IOExceptions thrown must be from interacting with the Writer so that the top level API may reliably ignore StringWriter IOExceptions.
      Specified by:
      translate in class CharSequenceTranslator
      Parameters:
      input - CharSequence that is being translated
      index - int representing the current point of translation
      writer - Writer to translate the text to
      Returns:
      int count of code points consumed
      Throws:
      IOException - if and only if the Writer produces an IOException