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AlgorithmParametersSpi (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档
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JavaTM 2 Platform Standard Ed. 5.0 |
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java.security
Class AlgorithmParametersSpi
java.lang.Objectjava.security.AlgorithmParametersSpi
public abstract class AlgorithmParametersSpi
- extends Object
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:
AlgorithmParameters,AlgorithmParameterSpec,DSAParameterSpec
| Constructor Summary | |
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AlgorithmParametersSpi()
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| Method Summary | ||
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protected abstract byte[] |
engineGetEncoded()
Returns the parameters in their primary encoding format. |
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protected abstract byte[] |
engineGetEncoded(String format)
Returns the parameters encoded in the specified format. |
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protected abstract
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engineGetParameterSpec(Class<T> paramSpec)
Returns a (transparent) specification of this parameters object. |
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protected abstract void |
engineInit(AlgorithmParameterSpec paramSpec)
Initializes this parameters object using the parameters specified in paramSpec. |
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protected abstract void |
engineInit(byte[] params)
Imports the specified parameters and decodes them according to the primary decoding format for parameters. |
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protected abstract void |
engineInit(byte[] params,
String format)
Imports the parameters from params and
decodes them according to the specified decoding format. |
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protected abstract String |
engineToString()
Returns a formatted string describing the parameters. |
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| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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AlgorithmParametersSpi
public AlgorithmParametersSpi()
| Method Detail |
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engineInit
protected abstract void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException
- 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.
engineInit
protected abstract void engineInit(byte[] params)
throws IOException
- Imports 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
engineInit
protected abstract void engineInit(byte[] params,
String format)
throws IOException
- Imports the parameters from
paramsand decodes them according to the specified decoding format. Ifformatis 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
engineGetParameterSpec
protected 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.- Parameters:
paramSpec- the 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.
engineGetEncoded
protected abstract byte[] engineGetEncoded()
throws IOException
- Returns 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 the specified encoding scheme.
- Throws:
IOException- on encoding errors.
engineGetEncoded
protected abstract byte[] engineGetEncoded(String format) throws IOException
- Returns the parameters encoded in the specified format.
If
formatis 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.- Parameters:
format- the name of the encoding format.- Returns:
- the parameters encoded using the specified encoding scheme.
- Throws:
IOException- on encoding errors.
engineToString
protected abstract String engineToString()
- Returns a formatted string describing the parameters.
- Returns:
- a formatted string describing the parameters.
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JavaTM 2 Platform Standard Ed. 5.0 |
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Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.