/**
 * 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.tsl;

import eu.europa.esig.dss.x509.CertificateToken;

/**
 * Test if the certificate has a Key usage
 */
@SuppressWarnings("serial")
public class KeyUsageCondition extends Condition {

	private final KeyUsageBit bit;
	private final boolean value;

	/**
	 * The default constructor for KeyUsageCondition.
	 *
	 * @param bit
	 */
	public KeyUsageCondition(final KeyUsageBit bit, final boolean value) {
		this.bit = bit;
		this.value = value;
	}

	/**
	 * The default constructor for KeyUsageCondition.
	 *
	 * @param value
	 */
	public KeyUsageCondition(final String usage, final boolean value) {
		this(KeyUsageBit.valueOf(usage), value);
	}

	/**
	 * @return the bit
	 */
	public KeyUsageBit getBit() {
		return bit;
	}

	/**
	 * Checks the condition for the given certificate.
	 *
	 * @param certificateToken
	 *            certificate to be checked
	 * @return
	 */
	@Override
	public boolean check(final CertificateToken certificateToken) {
		final boolean keyUsage = certificateToken.checkKeyUsage(bit);
		return keyUsage == value;
	}

	@Override
	public String toString(String indent) {
		if (indent == null) {
			indent = "";
		}
		StringBuilder builder = new StringBuilder();
		builder.append(indent).append("KeyUsageCondition: ").append(bit.name()).append("=").append(value).append('\n');
		return builder.toString();
	}

	@Override
	public String toString() {
		try {
			return toString("");
		} catch (Exception e) {
			return super.toString();
		}
	}

}