public abstract class AlgorithmParametersSpi extends Object
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.
Constructor | Description |
---|---|
AlgorithmParametersSpi() |
Constructor for subclasses to call. |
Modifier and Type | Method | Description |
---|---|---|
protected abstract byte[] |
engineGetEncoded() |
Returns the parameters in their primary encoding format. |
protected abstract byte[] |
engineGetEncoded |
Returns the parameters encoded in the specified format. |
protected abstract <T extends AlgorithmParameterSpec> |
engineGetParameterSpec |
Returns a (transparent) specification of this parameters object. |
protected abstract void |
engineInit |
Imports the specified parameters and decodes them according to the primary decoding format for parameters. |
protected abstract void |
engineInit |
Imports the parameters from params and decodes them according to the specified decoding format. |
protected abstract void |
engineInit |
Initializes this parameters object using the parameters specified in paramSpec . |
protected abstract String |
engineToString() |
Returns a formatted string describing the parameters. |
public AlgorithmParametersSpi()
protected abstract void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException
paramSpec
.paramSpec
- the parameter specification.InvalidParameterSpecException
- if the given parameter specification is inappropriate for the initialization of this parameter object.protected abstract void engineInit(byte[] params) throws IOException
params
- the encoded parameters.IOException
- on decoding errorsprotected abstract void engineInit(byte[] params, String format) throws IOException
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.params
- the encoded parameters.format
- the name of the decoding format.IOException
- on decoding errorsprotected abstract <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> paramSpec) throws InvalidParameterSpecException
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.T
- the type of the parameter specification to be returnedparamSpec
- the specification class in which the parameters should be returned.InvalidParameterSpecException
- if the requested parameter specification is inappropriate for this parameter object.protected abstract byte[] engineGetEncoded() throws IOException
IOException
- on encoding errors.protected abstract byte[] engineGetEncoded(String format) throws IOException
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.format
- the name of the encoding format.IOException
- on encoding errors.protected abstract String engineToString()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/security/AlgorithmParametersSpi.html