/*
 * DSS - Digital Signature Services
 *
 * Copyright (C) 2013 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel
 *
 * Developed by: 2013 ARHS Developments S.A. (rue Nicolas Bové 2B, L-1253 Luxembourg) http://www.arhs-developments.com
 *
 * This file is part of the "DSS - Digital Signature Services" project.
 *
 * "DSS - Digital Signature Services" 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.
 *
 * DSS 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
 * "DSS - Digital Signature Services".  If not, see <http://www.gnu.org/licenses/>.
 */
package eu.europa.ec.markt.dss.parameter;

import javax.xml.crypto.dsig.CanonicalizationMethod;

import eu.europa.ec.markt.dss.DSSUtils;
import eu.europa.ec.markt.dss.DigestAlgorithm;
import eu.europa.ec.markt.dss.exception.DSSNullException;

/**
 * This class represents the parameters provided when generating specific timestamps in a signature, such as an AllDataObjectsTimestamp or an
 * IndividualDataObjectsTimestamp.
 */
public class TimestampParameters {

	/**
	 * The digest algorithm to provide to the timestamping authority
	 */
	private DigestAlgorithm digestAlgorithm = DigestAlgorithm.SHA256;

	/**
	 * This is the default canonicalization method for XMLDSIG used for timestamps. Another complication arises because of the way that the default canonicalization algorithm
	 * handles namespace declarations; frequently a signed XML document needs to be embedded in another document; in this case the original canonicalization algorithm will not
	 * yield the same result as if the document is treated alone. For this reason, the so-called Exclusive Canonicalization, which serializes XML namespace declarations
	 * independently of the surrounding XML, was created.
	 */
	private String canonicalizationMethod = CanonicalizationMethod.EXCLUSIVE;


	public DigestAlgorithm getDigestAlgorithm() {
		return digestAlgorithm;
	}

	public void setDigestAlgorithm(final DigestAlgorithm digestAlgorithm) {

		if (digestAlgorithm == null) {
			throw new DSSNullException(DigestAlgorithm.class);
		}
		this.digestAlgorithm = digestAlgorithm;
	}

	public String getCanonicalizationMethod() {
		return canonicalizationMethod;
	}

	public void setCanonicalizationMethod(final String canonicalizationMethod) {

		if (DSSUtils.isBlank(canonicalizationMethod)) {
			throw new DSSNullException(String.class, "canonicalizationMethod");
		}
		this.canonicalizationMethod = canonicalizationMethod;
	}

	public String toString() {
		return "TimestampParameters{" +
			  ", digestAlgorithm=" + digestAlgorithm.getName() +
			  ", canonicalizationMethod=" + canonicalizationMethod +
			  "}";
	}
}