Class DevRandom

    • Constructor Summary

      Constructors 
      Constructor Description
      DevRandom()  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addRandomByte​(byte b)
      Supplement, or possibly replace, the random state of this PRNG with a random byte.
      void addRandomBytes​(byte[] in)
      Supplement, or possibly replace, the random state of this PRNG with a sequence of new random bytes.
      void addRandomBytes​(byte[] in, int offset, int length)
      Supplement, or possibly replace, the random state of this PRNG with a sequence of new random bytes.
      Object clone()
      Returns a clone copy of this instance.
      void init​(Map<String,​byte[]> attributes)
      Initialises the pseudo-random number generator scheme with the appropriate attributes.
      String name()
      Returns the canonical name of this instance.
      byte nextByte()
      Returns the next 8 bits of random data generated from this instance.
      void nextBytes​(byte[] out)  
      void nextBytes​(byte[] out, int offset, int length)
      Fills the designated byte array, starting from byte at index offset, for a maximum of length bytes with the output of this generator instance.
    • Constructor Detail

      • DevRandom

        DevRandom()
    • Method Detail

      • name

        public String name()
        Description copied from interface: IRandomStandalone

        Returns the canonical name of this instance.

        Specified by:
        name in interface IRandomStandalone
        Returns:
        the canonical name of this instance.
      • init

        public void init​(Map<String,​byte[]> attributes)
        Description copied from interface: IRandomStandalone

        Initialises the pseudo-random number generator scheme with the appropriate attributes.

        Specified by:
        init in interface IRandomStandalone
        Parameters:
        attributes - a set of name-value pairs that describe the desired future instance behaviour.
      • nextByte

        public byte nextByte()
        Description copied from interface: IRandomStandalone

        Returns the next 8 bits of random data generated from this instance.

        Specified by:
        nextByte in interface IRandomStandalone
        Returns:
        the next 8 bits of random data generated from this instance.
      • nextBytes

        public void nextBytes​(byte[] out,
                              int offset,
                              int length)
                       throws IllegalStateException
        Description copied from interface: IRandomStandalone

        Fills the designated byte array, starting from byte at index offset, for a maximum of length bytes with the output of this generator instance.

        Specified by:
        nextBytes in interface IRandomStandalone
        Parameters:
        out - the placeholder to contain the generated random bytes.
        offset - the starting index in out to consider. This method does nothing if this parameter is not within 0 and out.length.
        length - the maximum number of required random bytes. This method does nothing if this parameter is less than 1.
        Throws:
        IllegalStateException - if the instance is not yet initialised. theoretical limit for generating non-repetitive pseudo-random data.
      • addRandomByte

        public void addRandomByte​(byte b)
        Description copied from interface: IRandomStandalone

        Supplement, or possibly replace, the random state of this PRNG with a random byte.

        Implementations are not required to implement this method in any meaningful way; this may be a no-operation, and implementations may throw an UnsupportedOperationException.

        Specified by:
        addRandomByte in interface IRandomStandalone
        Parameters:
        b - The byte to add.
      • addRandomBytes

        public void addRandomBytes​(byte[] in)
        Description copied from interface: IRandomStandalone

        Supplement, or possibly replace, the random state of this PRNG with a sequence of new random bytes.

        Implementations are not required to implement this method in any meaningful way; this may be a no-operation, and implementations may throw an UnsupportedOperationException.

        Specified by:
        addRandomBytes in interface IRandomStandalone
        Parameters:
        in - The buffer of new random bytes to add.
      • addRandomBytes

        public void addRandomBytes​(byte[] in,
                                   int offset,
                                   int length)
        Description copied from interface: IRandomStandalone

        Supplement, or possibly replace, the random state of this PRNG with a sequence of new random bytes.

        Implementations are not required to implement this method in any meaningful way; this may be a no-operation, and implementations may throw an UnsupportedOperationException.

        Specified by:
        addRandomBytes in interface IRandomStandalone
        Parameters:
        in - The buffer of new random bytes to add.
        offset - The offset from whence to begin reading random bytes.
        length - The number of random bytes to add.