/**
* Copyright (C) 2013-2017 Regents of the University of California.
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* A copy of the GNU Lesser General Public License is in the file COPYING.
*/
package net.named_data.jndn;
import net.named_data.jndn.util.Blob;
import net.named_data.jndn.util.ChangeCountable;
/**
* A Signature is an abstract base class providing methods to work with the
* signature information in a Data packet.
* You must create an object of a subclass, for example Sha256WithRsaSignature.
*/
public abstract class Signature implements ChangeCountable {
/**
* Return a new Signature which is a deep copy of this signature.
* This is abstract, the subclass must implement it.
* @return A new Sha256WithRsaSignature.
* @throws CloneNotSupportedException
*/
public abstract Object clone() throws CloneNotSupportedException;
/**
* Get the signature bytes.
* @return The signature bytes. If not specified, the value isNull().
*/
public abstract Blob
getSignature();
/**
* Set the signature bytes to the given value.
* @param signature A Blob with the signature bytes.
*/
public abstract void
setSignature(Blob signature);
/**
* Get the change count, which is incremented each time this object
* (or a child object) is changed.
* @return The change count.
*/
public abstract long getChangeCount();
}