AlgorithmParametersSpi JDK 1.6)

Description

publicabstract abstract class AlgorithmParametersSpi

This class defines the Service Provider Interface (SPI) for the AlgorithmParameters class, which is used to manage algorithm parameters.

All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply parameter management for a particular algorithm.

See also: AlgorithmParameters AlgorithmParameterSpec DSAParameterSpec

Methods

Hide/Show inherited methods

protectedabstract byte engineGetEncoded () throws IOException

Returns the parameters in their primary encoding format.

protectedabstract byte engineGetEncoded (String format) throws IOException

Returns the parameters encoded in the specified format.

Returns the parameters encoded in the specified format.
If format is null, the
primary encoding format for parameters is used. The primary encoding
format is ASN.1, if an ASN.1 specification for these parameters
exists.
Returns: the parameters encoded using the specified encoding scheme.
Parameters:
- format - the name of the encoding format.
Throws:
- IOException - on encoding errors.

protectedabstract T engineGetParameterSpec (Class< T> paramSpec) throws InvalidParameterSpecException

Returns a (transparent) specification of this parameters object.

Returns a (transparent) specification of this parameters
object.
paramSpec identifies the specification class in which
the parameters should be returned. It could, for example, be
DSAParameterSpec.class, to indicate that the
parameters should be returned in an instance of the
DSAParameterSpec class.
Returns: the parameter specification.
Parameters:
- paramSpec - the the specification class in which the parameters should be returned.
Throws:
- InvalidParameterSpecException - if the requested parameter specification is inappropriate for this parameter object.

protectedabstract void engineInit (AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException

Initializes this parameters object using the parameters specified in paramSpec.

Initializes this parameters object using the parameters
specified in paramSpec.
Parameters:
- paramSpec - the parameter specification.
Throws:
- InvalidParameterSpecException - if the given parameter specification is inappropriate for the initialization of this parameter object.

protectedabstract void engineInit (byte[] params) throws IOException

Imports the specified parameters and decodes them according to the primary decoding format for parameters.

protectedabstract void engineInit (byte[] params, String format) throws IOException

Imports the parameters from params and decodes them according to the specified decoding format.

Imports the parameters from params and
decodes them according to the specified decoding format.
If format is null, the
primary decoding format for parameters is used. The primary decoding
format is ASN.1, if an ASN.1 specification for these parameters
exists.
Parameters:
- params - the encoded parameters.
- format - the name of the decoding format.
Throws:
- IOException - on decoding errors

protectedabstract String engineToString ()

Returns a formatted string describing the parameters.