package org.bouncycastle.x509;import java.io.IOException;import java.math.BigInteger;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.security.NoSuchProviderException;import java.security.PublicKey;import java.security.SignatureException;import java.security.cert.CertificateException;import java.security.cert.CertificateExpiredException;import java.security.cert.CertificateNotYetValidException;import java.security.cert.X509Extension;import java.util.Date;import java.util.Set;/** * Interface for an X.509 Attribute Certificate. */public interface X509AttributeCertificate    extends X509Extension{       /**     * Return the version number for the certificate.     *      * @return the version number.     */    public int getVersion();        /**     * Return the serial number for the certificate.     *      * @return the serial number.     */    public BigInteger getSerialNumber();        /**     * Return the date before which the certificate is not valid.     *      * @return the "not valid before" date.     */    public Date getNotBefore();        /**     * Return the date after which the certificate is not valid.     *      * @return the "not valid afer" date.     */    public Date getNotAfter();        /**     * Return the holder of the certificate.     *      * @return the holder.     */    public AttributeCertificateHolder getHolder();        /**     * Return the issuer details for the certificate.     *      * @return the issuer details.     */    public AttributeCertificateIssuer getIssuer();        /**     * Return the attributes contained in the attribute block in the certificate.     *      * @return an array of attributes.     */    public X509Attribute[] getAttributes();        /**     * Return the attributes with the same type as the passed in oid.     *      * @param oid the object identifier we wish to match.     * @return an array of matched attributes, null if there is no match.     */    public X509Attribute[] getAttributes(String oid);        public boolean[] getIssuerUniqueID();        public Set getNonCriticalExtensionOIDs();    public Set getCriticalExtensionOIDs();        public void checkValidity()        throws CertificateExpiredException, CertificateNotYetValidException;        public void checkValidity(Date date)        throws CertificateExpiredException, CertificateNotYetValidException;        public byte[] getSignature();        public void verify(PublicKey key, String provider)            throws CertificateException, NoSuchAlgorithmException,            InvalidKeyException, NoSuchProviderException, SignatureException;        /**     * Return an ASN.1 encoded byte array representing the attribute certificate.     *      * @return an ASN.1 encoded byte array.     * @throws IOException if the certificate cannot be encoded.     */    public byte[] getEncoded()        throws IOException;}