/*
 * Copyright 2005 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */
/*
 * $Id: DOMX509IssuerSerial.java,v 1.13 2005/05/10 18:15:35 mullan Exp $
 */
package org.jcp.xml.dsig.internal.dom;

import javax.xml.crypto.*;
import javax.xml.crypto.dom.DOMCryptoContext;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dsig.keyinfo.X509IssuerSerial;

import java.math.BigInteger;
import javax.security.auth.x500.X500Principal;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * DOM-based implementation of X509IssuerSerial.
 *
 * @author Sean Mullan
 */
public final class DOMX509IssuerSerial extends DOMStructure
    implements X509IssuerSerial {

    private final String issuerName;
    private final BigInteger serialNumber;

    /**
     * Creates a <code>DOMX509IssuerSerial</code> containing the specified
     * issuer distinguished name/serial number pair.
     *
     * @param issuerName the X.509 issuer distinguished name in RFC 2253
     *    String format
     * @param serialNumber the serial number
     * @throws IllegalArgumentException if the format of <code>issuerName</code>
     *    is not RFC 2253 compliant
     * @throws NullPointerException if <code>issuerName</code> or
     *    <code>serialNumber</code> is <code>null</code>
     */
    public DOMX509IssuerSerial(String issuerName, BigInteger serialNumber) {
        if (issuerName == null) {
            throw new NullPointerException("issuerName cannot be null");
        }
        if (serialNumber == null) {
            throw new NullPointerException("serialNumber cannot be null");
        }
        // check that issuer distinguished name conforms to RFC 2253
        new X500Principal(issuerName);
        this.issuerName = issuerName;
        this.serialNumber = serialNumber;
    }

    /**
     * Creates a <code>DOMX509IssuerSerial</code> from an element.
     *
     * @param isElem an X509IssuerSerial element
     */
    public DOMX509IssuerSerial(Element isElem) {
        Element iNElem = DOMUtils.getFirstChildElement(isElem);
        Element sNElem = DOMUtils.getNextSiblingElement(iNElem);
        issuerName = iNElem.getFirstChild().getNodeValue();
        serialNumber = new BigInteger(sNElem.getFirstChild().getNodeValue());
    }

    public String getIssuerName() {
        return issuerName;
    }

    public BigInteger getSerialNumber() {
        return serialNumber;
    }

    public void marshal(Node parent, String dsPrefix, DOMCryptoContext context)
        throws MarshalException {
        Document ownerDoc = DOMUtils.getOwnerDocument(parent);

        Element isElem = DOMUtils.createElement
            (ownerDoc, "X509IssuerSerial", XMLSignature.XMLNS, dsPrefix);
        Element inElem = DOMUtils.createElement
            (ownerDoc, "X509IssuerName", XMLSignature.XMLNS, dsPrefix);
        Element snElem = DOMUtils.createElement
            (ownerDoc, "X509SerialNumber", XMLSignature.XMLNS, dsPrefix);
        inElem.appendChild(ownerDoc.createTextNode(issuerName));
        snElem.appendChild(ownerDoc.createTextNode(serialNumber.toString()));
        isElem.appendChild(inElem);
        isElem.appendChild(snElem);
        parent.appendChild(isElem);
    }

    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof X509IssuerSerial)) {
            return false;
        }
        X509IssuerSerial ois = (X509IssuerSerial) obj;
        return (issuerName.equals(ois.getIssuerName()) &&
            serialNumber.equals(ois.getSerialNumber()));
    }
}