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## java.security.cert
Class CertPathValidatorSpi

    java.lang.Object
      java.security.cert.CertPathValidatorSpi

    public abstract class CertPathValidatorSpi

extends Object

The Service Provider Interface (SPI) for the `CertPathValidator` class. All `CertPathValidator` implementations must include a class (the SPI class) that extends this class (`CertPathValidatorSpi`) and implements all of its methods. In general, instances of this class should only be accessed through the `CertPathValidator` class. For details, see the Java Cryptography Architecture.

Concurrent Access

Instances of this class need not be protected against concurrent access from multiple threads. Threads that need to access a single `CertPathValidatorSpi` instance concurrently should synchronize amongst themselves and provide the necessary locking before calling the wrapping `CertPathValidator` object.

However, implementations of `CertPathValidatorSpi` may still encounter concurrency issues, since multiple threads each manipulating a different `CertPathValidatorSpi` instance need not synchronize.

Since:
  1.4
See Also:
  `CertPathValidator`

Constructor Summary
`CertPathValidatorSpi()` The default constructor.

Method Summary
`abstract CertPathValidatorResult` | `engineValidate(CertPath certPath, CertPathParameters params)` Validates the specified certification path using the specified algorithm parameter set.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### CertPathValidatorSpi

    public CertPathValidatorSpi()

  The default constructor.

Method Detail

### engineValidate

    public abstract CertPathValidatorResult engineValidate(CertPath certPath,
                                                           CertPathParameters params)
                                                    throws CertPathValidatorException,
                                                           InvalidAlgorithmParameterException

  Validates the specified certification path using the specified algorithm parameter set.

  The `CertPath` specified must be of a type that is supported by the validation algorithm, otherwise an `InvalidAlgorithmParameterException` will be thrown. For example, a `CertPathValidator` that implements the PKIX algorithm validates `CertPath` objects of type X.509.

  Parameters:
    `certPath` - the `CertPath` to be validated
    `params` - the algorithm parameters
  Returns:
    the result of the validation algorithm
  Throws:
    `CertPathValidatorException` - if the `CertPath` does not validate
    `InvalidAlgorithmParameterException` - if the specified parameters or the type of the specified `CertPath` are inappropriate for this `CertPathValidator`

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