Class BinaryUtils

java.lang.Object
com.amazonaws.util.BinaryUtils
public class BinaryUtils extends Object
Utilities for encoding and decoding binary data to and from different forms.

  • Constructor Summary

    Constructors
    Constructor
    Description
    BinaryUtils()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    copyAllBytesFrom(ByteBuffer bb)
    Returns a copy of all the bytes from the given ByteBuffer, from the beginning to the buffer's limit; or null if the input is null.
    static byte[]
    copyBytesFrom(ByteBuffer bb)
    Returns a copy of the bytes from the given ByteBuffer, ranging from the the buffer's current position to the buffer's limit; or null if the input is null.
    static byte[]
    fromBase64(String b64Data)
    Converts a Base64-encoded string to the original byte data.
    static byte[]
    fromHex(String hexData)
    Converts a Hex-encoded data string to the original byte data.
    static String
    toBase64(byte[] data)
    Converts byte data to a Base64-encoded string.
    static String
    toHex(byte[] data)
    Converts byte data to a Hex-encoded string in lower case.
    static ByteArrayInputStream
    toStream(ByteBuffer byteBuffer)
    Wraps a ByteBuffer in an InputStream.

    Methods inherited from class Object

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

  • Constructor Details

    • BinaryUtils

      public BinaryUtils()

  • Method Details

    • toHex

      public static String toHex(byte[] data)
      Converts byte data to a Hex-encoded string in lower case.
      Parameters:
      data - data to hex encode.
      Returns:
      hex-encoded string.

    • fromHex

      public static byte[] fromHex(String hexData)
      Converts a Hex-encoded data string to the original byte data.
      Parameters:
      hexData - hex-encoded data to decode.
      Returns:
      decoded data from the hex string.

    • toBase64

      public static String toBase64(byte[] data)
      Converts byte data to a Base64-encoded string.
      Parameters:
      data - data to Base64 encode.
      Returns:
      encoded Base64 string.

    • fromBase64

      public static byte[] fromBase64(String b64Data)
      Converts a Base64-encoded string to the original byte data.
      Parameters:
      b64Data - a Base64-encoded string to decode.
      Returns:
      bytes decoded from a Base64 string.

    • toStream

      public static ByteArrayInputStream toStream(ByteBuffer byteBuffer)
      Wraps a ByteBuffer in an InputStream. If the input byteBuffer is null, returns an empty stream.
      Parameters:
      byteBuffer - The ByteBuffer to wrap.
      Returns:
      An InputStream wrapping the ByteBuffer content.

    • copyAllBytesFrom

      public static byte[] copyAllBytesFrom(ByteBuffer bb)
      Returns a copy of all the bytes from the given ByteBuffer, from the beginning to the buffer's limit; or null if the input is null.

      The internal states of the given byte buffer will be restored when this method completes execution.

      When handling ByteBuffer from user's input, it's typical to call the copyBytesFrom(ByteBuffer) instead of copyAllBytesFrom(ByteBuffer) so as to account for the position of the input ByteBuffer. The opposite is typically true, however, when handling ByteBuffer from withint the unmarshallers of the low-level clients.

    • copyBytesFrom

      public static byte[] copyBytesFrom(ByteBuffer bb)
      Returns a copy of the bytes from the given ByteBuffer, ranging from the the buffer's current position to the buffer's limit; or null if the input is null.

      The internal states of the given byte buffer will be restored when this method completes execution.

      When handling ByteBuffer from user's input, it's typical to call the copyBytesFrom(ByteBuffer) instead of copyAllBytesFrom(ByteBuffer) so as to account for the position of the input ByteBuffer. The opposite is typically true, however, when handling ByteBuffer from withint the unmarshallers of the low-level clients.