src/java.base/share/classes/sun/security/provider/certpath/State.java

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package sun.security.provider.certpath;

import java.io.IOException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.security.cert.CertPathValidatorException;

/**
 * A specification of a PKIX validation state
 * which is initialized by each build and updated each time a
 * certificate is added to the current path.
 *
 * @since       1.4
 * @author      Sean Mullan
 * @author      Yassir Elley
 */

interface State extends Cloneable {

    /**
     * Update the state with the next certificate added to the path.
     *
     * @param cert the certificate which is used to update the state
     */
    void updateState(X509Certificate cert)
        throws CertificateException, IOException, CertPathValidatorException;

    /**
     * Creates and returns a copy of this object
     */
    Object clone();

    /**
     * Returns a boolean flag indicating if the state is initial
     * (just starting)
     *
     * @return boolean flag indicating if the state is initial (just starting)
     */
    boolean isInitial();
}