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/*
* Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.x509;
import java.io.IOException;
import java.io.OutputStream;
import java.security.cert.CertificateException;
import java.util.Enumeration;
/**
* This interface defines the methods required of a certificate attribute.
* Examples of X.509 certificate attributes are Validity, Issuer_Name, and
* Subject Name. A CertAttrSet may comprise one attribute or many
* attributes.
* <p>
* A CertAttrSet itself can also be comprised of other sub-sets.
* In the case of X.509 V3 certificates, for example, the "extensions"
* attribute has subattributes, such as those for KeyUsage and
* AuthorityKeyIdentifier.
*
* @author Amit Kapoor
* @author Hemma Prafullchandra
* @see CertificateException
*/
public interface CertAttrSet<T> {
/**
* Returns a short string describing this certificate attribute.
*
* @return value of this certificate attribute in
* printable form.
*/
String toString();
/**
* Encodes the attribute to the output stream in a format
* that can be parsed by the <code>decode</code> method.
*
* @param out the OutputStream to encode the attribute to.
*
* @exception CertificateException on encoding or validity errors.
* @exception IOException on other errors.
*/
void encode(OutputStream out)
throws CertificateException, IOException;
/**
* Sets an attribute value within this CertAttrSet.
*
* @param name the name of the attribute (e.g. "x509.info.key")
* @param obj the attribute object.
*
* @exception CertificateException on attribute handling errors.
* @exception IOException on other errors.
*/
void set(String name, Object obj)
throws CertificateException, IOException;
/**
* Gets an attribute value for this CertAttrSet.
*
* @param name the name of the attribute to return.
*
* @exception CertificateException on attribute handling errors.
* @exception IOException on other errors.
*/
Object get(String name)
throws CertificateException, IOException;
/**
* Deletes an attribute value from this CertAttrSet.
*
* @param name the name of the attribute to delete.
*
* @exception CertificateException on attribute handling errors.
* @exception IOException on other errors.
*/
void delete(String name)
throws CertificateException, IOException;
/**
* Returns an enumeration of the names of the attributes existing within
* this attribute.
*
* @return an enumeration of the attribute names.
*/
Enumeration<T> getElements();
/**
* Returns the name (identifier) of this CertAttrSet.
*
* @return the name of this CertAttrSet.
*/
String getName();
}
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