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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

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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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.