Java in a Nutshell, 5th Edition [Electronic resources]

This abstract class defines the Service Provider Interface for the CertPathValidator class. Security providers must implement this interface, but applications never need to use it.

public abstract class 
CertPathValidatorSpi  {
// Public Constructors
public 
CertPathValidatorSpi ( );  
// Public Instance Methods
public abstract CertPathValidatorResult 
engineValidate (CertPath 
certPath , 
CertPathParameters 
params ) 
throws CertPathValidatorException, 
java.security.InvalidAlgorithmParameterException;  
}

Passed To

CertPathValidator.CertPathValidator( )