org.firebirdsql.util

## Class ByteArrayHelper

- java.lang.Object
- - org.firebirdsql.util.ByteArrayHelper

-     @InternalApi
      public final class ByteArrayHelper
      extends java.lang.Object

  Helper methods for byte arrays.
  Since:
    3.0
  Author:
    Mark Rotteveel

- - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static byte[]` | `emptyByteArray()`
    `static byte[]` | `fromBase64String(java.lang.String base64)` Decodes a base64 encoded string to a byte array.
    `static byte[]` | `fromBase64urlString(java.lang.String base64url)` Decodes a base64url encoded string to a byte array.
    `static byte[]` | `fromHexString(java.lang.String hexString)` Converts the provided hexadecimal string to a byte array.
    `static int` | `indexOf(byte[] array, byte b)` Returns the index of the first occurrence of `b` in `array`.
    `static java.lang.String` | `toHexString(byte[] bytes)` Converts the provided byte array to a hexadecimal string

    - ### Methods inherited from class java.lang.Object

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

- - ### Method Detail

    - #### toHexString

          public static java.lang.String toHexString(byte[] bytes)

      Converts the provided byte array to a hexadecimal string

      Adapted from https://stackoverflow.com/a/21429909/466862 by higginse

      Parameters:
        `bytes` - byte array (not `null`
      Returns:
        String with the content of the byte array in hexadecimal.

    - #### fromHexString

          public static byte[] fromHexString(java.lang.String hexString)

      Converts the provided hexadecimal string to a byte array.
      Parameters:
        `hexString` - Hexadecimal string
      Returns:
        byte array
      Since:
        4.0

    - #### fromBase64String

          public static byte[] fromBase64String(java.lang.String base64)

      Decodes a base64 encoded string to a byte array.
      Parameters:
        `base64` - Base64 encoded data
      Returns:
        byte array after decoding

    - #### fromBase64urlString

          public static byte[] fromBase64urlString(java.lang.String base64url)

      Decodes a base64url encoded string to a byte array.

      Base64url applies the "URL and Filename safe" Base 64 Alphabet.

      Parameters:
        `base64url` - Base64url encoded data
      Returns:
        byte array after decoding
      Since:
        5

    - #### indexOf

          public static int indexOf(byte[] array,
                                    byte b)

      Returns the index of the first occurrence of `b` in `array`.
      Parameters:
        `array` - Array to search
        `b` - byte to find
      Returns:
        the index of the first occurrence of `b`, or `-1` if `b` is not in the array
      Since:
        5

    - #### emptyByteArray

          public static byte[] emptyByteArray()

      Returns:
        an empty array (length == 0)

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