eu.europa.esig.dss.spi.x509.revocation.RevocationRef Maven / Gradle / Ivy

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/**
 * DSS - Digital Signature Services
 * Copyright (C) 2015 European Commission, provided under the CEF programme
 * 
 * This file is part of the "DSS - Digital Signature Services" project.
 * 

 * This library 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 2.1 of the License, or (at your option) any later version.
 * 

 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package eu.europa.esig.dss.spi.x509.revocation;

import eu.europa.esig.dss.model.Digest;
import eu.europa.esig.dss.model.identifier.Identifier;
import eu.europa.esig.dss.model.identifier.IdentifierBasedObject;
import eu.europa.esig.dss.model.x509.revocation.Revocation;
import eu.europa.esig.dss.utils.Utils;

import java.io.Serializable;

/**
 * This class represents an extracted revocation reference from a signature
 *
 * @param  {@code Revocation}
 */
public abstract class RevocationRef implements IdentifierBasedObject, Serializable {

	private static final long serialVersionUID = 7313118727647264457L;

	/** Digest within the reference */
	protected Digest digest = null;

	/** Reference unique identifier */
	private Identifier identifier;

	/**
	 * Default constructor instantiating object with null values
	 */
	protected RevocationRef() {
		// empty
	}

	/**
	 * Returns digests of the reference
	 *
	 * @return {@link Digest}
	 */
	public Digest getDigest() {
		return digest;
	}
	
	/**
	 * Returns the revocation ref DSS Identifier
	 * 
	 * @return {@link Identifier}
	 */
	public Identifier getDSSId() {
		if (identifier == null) {
			identifier = createIdentifier();
		}
		return identifier;
	}

	/**
	 * Creates the unique identifier
	 *
	 * @return {@link Identifier}
	 */
	protected Identifier createIdentifier() {
		return new RevocationRefIdentifier(this);
	}
	
	/**
	 * Returns revocation reference {@link String} id
	 *
	 * @return {@link String} id
	 */
	public String getDSSIdAsString() {
		return getDSSId().asXmlId();
	}
	
	@Override
	public String toString() {
		return Utils.toBase64(digest.getValue());
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((digest == null) ? 0 : digest.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		RevocationRef other = (RevocationRef) obj;
		if (digest == null) {
			return other.digest == null;
		} else return digest.equals(other.digest);
	}

}