Package org.apache.openjpa.lib.util

Class Bytes

java.lang.Object
org.apache.openjpa.lib.util.Bytes
public final class Bytes extends Object
This class came from the Apache Commons Id sandbox project in support of the UUIDGenerator implementation.

Static methods for managing byte arrays (all methods follow Big Endian order where most significant bits are in front).

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    append(byte[] a, byte[] b)
    Appends two bytes array into one.
    static boolean
    areEqual(byte[] a, byte[] b)
    Compares two byte arrays for equality.
    static int
    compareTo(byte[] lhs, byte[] rhs)
    Compares two byte arrays as specified by Comparable.
    static byte[]
    toBytes(long n)
    Returns a 8-byte array built from a long.
    static byte[]
    toBytes(long n, byte[] b)
    Build a 8-byte array from a long.
    static long
    toLong(byte[] b)
    Build a long from first 8 bytes of the array.
    static short
    toShort(byte[] b)
    Build a short from first 2 bytes of the array.

    Methods inherited from class java.lang.Object

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

  • Method Details

    • append

      public static byte[] append(byte[] a, byte[] b)
      Appends two bytes array into one.
      Parameters:
      a - A byte[].
      b - A byte[].
      Returns:
      A byte[].

    • toBytes

      public static byte[] toBytes(long n)
      Returns a 8-byte array built from a long.
      Parameters:
      n - The number to convert.
      Returns:
      A byte[].

    • toBytes

      public static byte[] toBytes(long n, byte[] b)
      Build a 8-byte array from a long. No check is performed on the array length.
      Parameters:
      n - The number to convert.
      b - The array to fill.
      Returns:
      A byte[].

    • toLong

      public static long toLong(byte[] b)
      Build a long from first 8 bytes of the array.
      Parameters:
      b - The byte[] to convert.
      Returns:
      A long.

    • areEqual

      public static boolean areEqual(byte[] a, byte[] b)
      Compares two byte arrays for equality.
      Parameters:
      a - A byte[].
      b - A byte[].
      Returns:
      True if the arrays have identical contents.

    • compareTo

      public static int compareTo(byte[] lhs, byte[] rhs)

      Compares two byte arrays as specified by Comparable.

      Parameters:
      lhs - - left hand value in the comparison operation.
      rhs - - right hand value in the comparison operation.
      Returns:
      a negative integer, zero, or a positive integer as lhs is less than, equal to, or greater than rhs.

    • toShort

      public static short toShort(byte[] b)
      Build a short from first 2 bytes of the array.
      Parameters:
      b - The byte[] to convert.
      Returns:
      A short.