java.lang.Object
java.security.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.
- Since:
- 1.2
- See Also:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionprotected abstract byte[]Returns the parameters in their primary encoding format.protected abstract byte[]engineGetEncoded(String format) Returns the parameters encoded in the specified format.protected abstract <T extends AlgorithmParameterSpec>
 TengineGetParameterSpec(Class<T> paramSpec) Returns a (transparent) specification of this parameters object.protected abstract voidengineInit(byte[] params) Imports the specified parameters and decodes them according to the primary decoding format for parameters.protected abstract voidengineInit(byte[] params, String format) Imports the parameters fromparamsand decodes them according to the specified decoding format.protected abstract voidengineInit(AlgorithmParameterSpec paramSpec) Initializes this parameters object using the parameters specified inparamSpec.protected abstract StringReturns a formatted string describing the parameters.
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Constructor Details- 
AlgorithmParametersSpipublic AlgorithmParametersSpi()Constructor for subclasses to call.
 
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Method Details- 
engineInitprotected abstract void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException Initializes this parameters object using the parameters specified inparamSpec.- Parameters:
- paramSpec- the parameter specification.
- Throws:
- InvalidParameterSpecException- if the given parameter specification is inappropriate for the initialization of this parameter object.
 
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engineInitImports the specified parameters and decodes them according to the primary decoding format for parameters. The primary decoding format for parameters is ASN.1, if an ASN.1 specification for this type of parameters exists.- Parameters:
- params- the encoded parameters.
- Throws:
- IOException- on decoding errors
 
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engineInitImports the parameters fromparamsand decodes them according to the specified decoding format. Ifformatisnull, 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
 
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engineGetParameterSpecprotected abstract <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> paramSpec) throws InvalidParameterSpecException Returns a (transparent) specification of this parameters object.paramSpecidentifies the specification class in which the parameters should be returned. It could, for example, beDSAParameterSpec.class, to indicate that the parameters should be returned in an instance of theDSAParameterSpecclass.- Type Parameters:
- T- the type of the parameter specification to be returned
- Parameters:
- paramSpec- the specification class in which the parameters should be returned.
- Returns:
- the parameter specification.
- Throws:
- InvalidParameterSpecException- if the requested parameter specification is inappropriate for this parameter object.
 
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engineGetEncodedReturns the parameters in their primary encoding format. The primary encoding format for parameters is ASN.1, if an ASN.1 specification for this type of parameters exists.- Returns:
- the parameters encoded using their primary encoding format.
- Throws:
- IOException- on encoding errors.
 
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engineGetEncodedReturns the parameters encoded in the specified format. Ifformatisnull, the primary encoding format for parameters is used. The primary encoding format is ASN.1, if an ASN.1 specification for these parameters exists.- Parameters:
- format- the name of the encoding format.
- Returns:
- the parameters encoded using the specified encoding scheme.
- Throws:
- IOException- on encoding errors.
 
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engineToStringReturns a formatted string describing the parameters.- Returns:
- a formatted string describing the parameters.
 
 
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