Package com.stardog.stark.io.ntriples

Class NTriplesUtil

java.lang.Object
com.stardog.stark.io.ntriples.NTriplesUtil
public final class NTriplesUtil extends Object

Utilities for reading and writing NTriples

  • Method Summary

    Modifier and Type
    Method
    Description
    static String
    escapeString(String label)
    Escapes a Unicode string to an all-ASCII character sequence.
    static void
    escapeString(String label, Appendable appendable)
    Escapes a Unicode string to an all-ASCII character sequence.
    static void
    escapeString(String label, Appendable appendable, boolean escapeUnicode)
    Escapes a Unicode string to an N-Triples compatible character sequence.
    static boolean
    isBnodeLabelChar(int c)
     
    static boolean
    isLetter(int c)
    Checks whether the supplied character is a letter according to the N-Triples specification.
    static boolean
    isLetterOrNumber(int c)
    Checks whether the supplied character is a letter or number according to the N-Triples specification.
    static boolean
    isNumber(int c)
    Checks whether the supplied character is a number according to the N-Triples specification.
    static boolean
    isStartingBnodeLabelChar(int c)
    Is the var valid as the first char in a bnode label?
    static String
    toHexString(int decimal, int stringLength)
    Converts a decimal value to a hexadecimal string represention of the specified length.
    static String
    unescapeString(String s)
    Unescapes an escaped Unicode string.

    Methods inherited from class java.lang.Object

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

  • Method Details

    • isLetterOrNumber

      public static boolean isLetterOrNumber(int c)
      Checks whether the supplied character is a letter or number according to the N-Triples specification.
      See Also:

    • isLetter

      public static boolean isLetter(int c)
      Checks whether the supplied character is a letter according to the N-Triples specification. N-Triples letters are A - Z and a - z.

    • isNumber

      public static boolean isNumber(int c)
      Checks whether the supplied character is a number according to the N-Triples specification. N-Triples numbers are 0 - 9.

    • isStartingBnodeLabelChar

      public static boolean isStartingBnodeLabelChar(int c)
      Is the var valid as the first char in a bnode label?

    • isBnodeLabelChar

      public static boolean isBnodeLabelChar(int c)

    • unescapeString

      public static String unescapeString(String s)
      Unescapes an escaped Unicode string. Any Unicode sequences ( \uxxxx and \Uxxxxxxxx) are restored to the value indicated by the hexadecimal argument and any backslash-escapes ( \", \\, etc.) are decoded to their original form.
      Parameters:
      s - An escaped Unicode string.
      Returns:
      The unescaped string.
      Throws:
      IllegalArgumentException - If the supplied string is not a correctly escaped N-Triples string.

    • escapeString

      public static String escapeString(String label)
      Escapes a Unicode string to an all-ASCII character sequence. Any special characters are escaped using backslashes (" becomes \", etc.), and non-ascii/non-printable characters are escaped using Unicode escapes (\uxxxx and \Uxxxxxxxx).

    • escapeString

      public static void escapeString(String label, Appendable appendable) throws IOException
      Escapes a Unicode string to an all-ASCII character sequence. Any special characters are escaped using backslashes (" becomes \", etc.), and non-ascii/non-printable characters are escaped using Unicode escapes (\uxxxx and \Uxxxxxxxx).
      Throws:
      IOException

    • escapeString

      public static void escapeString(String label, Appendable appendable, boolean escapeUnicode) throws IOException
      Escapes a Unicode string to an N-Triples compatible character sequence. Any special characters are escaped using backslashes (" becomes \", etc.), and non-ascii/non-printable characters are escaped using Unicode escapes (\uxxxx and \Uxxxxxxxx) if the option is selected.
      Throws:
      IOException
      Since:
      2.8.0

    • toHexString

      public static String toHexString(int decimal, int stringLength)
      Converts a decimal value to a hexadecimal string represention of the specified length.
      Parameters:
      decimal - A decimal value.
      stringLength - The length of the resulting string.