IT. Expert System.

public class AlgorithmParameters
extends Object

• Constructor Summary

  Constructors

  Modifier	Constructor and Description
  protected	AlgorithmParameters(AlgorithmParametersSpi algPramSpi, Provider provider, String algorithm) Constructs a new instance of AlgorithmParameters with the given arguments.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  String	getAlgorithm() Returns the name of the algorithm.
  byte[]	getEncoded() Returns this AlgorithmParameters in their default encoding format.
  byte[]	getEncoded(String format) Returns this AlgorithmParameters in the specified encoding format.
  static AlgorithmParameters	getInstance(String algorithm) Returns a new instance of AlgorithmParameters for the specified algorithm.
  static AlgorithmParameters	getInstance(String algorithm, Provider provider) Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.
  static AlgorithmParameters	getInstance(String algorithm, String provider) Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.
  <T extends AlgorithmParameterSpec> T	getParameterSpec(Class<T> paramSpec) Returns the AlgorithmParameterSpec for this AlgorithmParameters.
  Provider	getProvider() Returns the provider associated with this AlgorithmParameters.
  void	init(AlgorithmParameterSpec paramSpec) Initializes this AlgorithmParameters with the specified AlgorithmParameterSpec.
  void	init(byte[] params) Initializes this AlgorithmParameters with the specified byte[] using the default decoding format for parameters.
  void	init(byte[] params, String format) Initializes this AlgorithmParameters with the specified byte[] using the specified decoding format.
  String	toString() Returns a string containing a concise, human-readable description of this AlgorithmParameters.

  • Methods inherited from class java.lang.Object

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

• Constructor Detail

  • AlgorithmParameters

    protected AlgorithmParameters(AlgorithmParametersSpi algPramSpi,
                       Provider provider,
                       String algorithm)

    Constructs a new instance of AlgorithmParameters with the given arguments.

    Parameters:

    algPramSpi - the concrete implementation.

    provider - the security provider.

    algorithm - the name of the algorithm.

• Method Detail

  • getInstance

    public static AlgorithmParameters getInstance(String algorithm)
                                           throws NoSuchAlgorithmException

    Returns a new instance of AlgorithmParameters for the specified algorithm.

    Parameters:

    algorithm - the name of the algorithm to use.

    Returns:

    a new instance of AlgorithmParameters for the specified algorithm.

    Throws:

    NoSuchAlgorithmException - if the specified algorithm is not available.

    NullPointerException - if algorithm is null.

  • getInstance

    public static AlgorithmParameters getInstance(String algorithm,
                                  String provider)
                                           throws NoSuchAlgorithmException,
                                                  NoSuchProviderException

    Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.

    Parameters:

    algorithm - the name of the algorithm to use.

    provider - name of the provider of the AlgorithmParameters.

    Returns:

    a new instance of AlgorithmParameters for the specified algorithm.

    Throws:

    NoSuchAlgorithmException - if the specified algorithm is not available.

    NoSuchProviderException - if the specified provider is not available.

    IllegalArgumentException - if provider == null || provider.isEmpty()

    NullPointerException - if algorithm is null.

  • getInstance

    public static AlgorithmParameters getInstance(String algorithm,
                                  Provider provider)
                                           throws NoSuchAlgorithmException

    Returns a new instance of AlgorithmParameters from the specified provider for the specified algorithm.

    Parameters:

    algorithm - the name of the algorithm to use.

    provider - the provider of the AlgorithmParameters.

    Returns:

    a new instance of AlgorithmParameters for the specified algorithm.

    Throws:

    NoSuchAlgorithmException - if the specified algorithm is not available.

    NullPointerException - if algorithm is null.

    IllegalArgumentException - if provider == null

  • getProvider

    public final Provider getProvider()

    Returns the provider associated with this AlgorithmParameters.

    Returns:

    the provider associated with this AlgorithmParameters.

  • getAlgorithm

    public final String getAlgorithm()

    Returns the name of the algorithm.

    Returns:

    the name of the algorithm.

  • init

    public final void init(AlgorithmParameterSpec paramSpec)
                    throws InvalidParameterSpecException

    Initializes this AlgorithmParameters with the specified AlgorithmParameterSpec.

    Parameters:

    paramSpec - the parameter specification.

    Throws:

    InvalidParameterSpecException - if this AlgorithmParameters has already been initialized or the given paramSpec is not appropriate for initializing this AlgorithmParameters.

  • init

    public final void init(byte[] params)
                    throws IOException

    Initializes this AlgorithmParameters with the specified byte[] using the default decoding format for parameters. The default encoding format is ASN.1.

    Parameters:

    params - the encoded parameters.

    Throws:

    IOException - if this AlgorithmParameters has already been initialized, or the parameter could not be encoded.

  • init

    public final void init(byte[] params,
            String format)
                    throws IOException

    Initializes this AlgorithmParameters with the specified byte[] using the specified decoding format.

    Parameters:

    params - the encoded parameters.

    format - the name of the decoding format.

    Throws:

    IOException - if this AlgorithmParameters has already been initialized, or the parameter could not be encoded.

  • getParameterSpec

    public final <T extends AlgorithmParameterSpec> T getParameterSpec(Class<T> paramSpec)
                                                            throws InvalidParameterSpecException

    Returns the AlgorithmParameterSpec for this AlgorithmParameters.

    Parameters:

    paramSpec - the type of the parameter specification in which this parameters should be converted.

    Returns:

    the AlgorithmParameterSpec for this AlgorithmParameters.

    Throws:

    InvalidParameterSpecException - if this AlgorithmParameters has already been initialized, or if this parameters could not be converted to the specified class.

  • getEncoded

    public final byte[] getEncoded()
                            throws IOException

    Returns this AlgorithmParameters in their default encoding format. The default encoding format is ASN.1.

    Returns:

    the encoded parameters.

    Throws:

    IOException - if this AlgorithmParameters has already been initialized, or if this parameters could not be encoded.

  • getEncoded

    public final byte[] getEncoded(String format)
                            throws IOException

    Returns this AlgorithmParameters in the specified encoding format.

    Parameters:

    format - the name of the encoding format.

    Returns:

    the encoded parameters.

    Throws:

    IOException - if this AlgorithmParameters has already been initialized, or if this parameters could not be encoded.

  • toString

    public final String toString()

    Returns a string containing a concise, human-readable description of this AlgorithmParameters.

    Overrides:

    toString in class Object

    Returns:

    a printable representation for this AlgorithmParameters.