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

public abstract class CertPathBuilderSpi {
// Public Constructors
     public CertPathBuilderSpi( );  
// Public Instance Methods
     public abstract CertPathBuilderResult engineBuild(CertPathParameters params) 
        throws CertPathBuilderException, 
        java.security.InvalidAlgorithmParameterException;  
}

Passed To

CertPathBuilder.CertPathBuilder( )