/**
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements. See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership. The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at
    *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied. See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  package org.apache.wss4j.common.token;
  
  import org.apache.wss4j.common.WSS4JConstants;
  import org.apache.wss4j.common.util.DOM2Writer;
  import org.apache.wss4j.common.util.CommaDelimiterRfc2253Name;
  import org.apache.wss4j.common.util.XMLUtils;
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  
  import java.math.BigInteger;
  
  import javax.security.auth.x500.X500Principal;
  
  /**
   * An X.509 Issuer Serial token.
   */
  public final class DOMX509IssuerSerial {
      private final Element element;
      private final String issuer;
      private final BigInteger serialNumber;
  
      /**
       * Constructor.
       */
      public DOMX509IssuerSerial(Element issuerSerialElement) {
          element = issuerSerialElement;
  
          Element issuerNameElement =
              XMLUtils.getDirectChildElement(element, "X509IssuerName", WSS4JConstants.SIG_NS);
          issuer = XMLUtils.getElementText(issuerNameElement);
  
          Element serialNumberElement =
              XMLUtils.getDirectChildElement(element, "X509SerialNumber", WSS4JConstants.SIG_NS);
  
          String serialNumberStr = XMLUtils.getElementText(serialNumberElement);
          if (serialNumberStr != null) {
              serialNumber = new BigInteger(serialNumberStr);
          } else {
              serialNumber = null;
          }
  
      }
  
      /**
       * Constructor.
       */
      public DOMX509IssuerSerial(Document doc, String issuer, BigInteger serialNumber) {
          this(doc,issuer,serialNumber,false);
      }
  
      /**
       * Constructor.
       */
      public DOMX509IssuerSerial(Document doc, String issuer, BigInteger serialNumber, boolean isCommaDelimited) {
          if (issuer == null) {
              throw new NullPointerException("The issuerName cannot be null");
          }
          if (serialNumber == null) {
              throw new NullPointerException("The serialNumber cannot be null");
          }
          if (isCommaDelimited) {
              this.issuer = new CommaDelimiterRfc2253Name().execute(new X500Principal(issuer).getName());
          } else {
              this.issuer = new X500Principal(issuer).getName();
          }
          this.serialNumber = serialNumber;
  
          element =
              doc.createElementNS(WSS4JConstants.SIG_NS, "ds:X509IssuerSerial");
  
          Element issuerNameElement =
              doc.createElementNS(WSS4JConstants.SIG_NS, "ds:X509IssuerName");
          issuerNameElement.appendChild(doc.createTextNode(this.issuer));
          element.appendChild(issuerNameElement);
  
          Element serialNumberElement =
              doc.createElementNS(WSS4JConstants.SIG_NS, "ds:X509SerialNumber");
          serialNumberElement.appendChild(doc.createTextNode(serialNumber.toString()));
          element.appendChild(serialNumberElement);
      }
 
 
     /**
      * return the dom element.
      *
      * @return the dom element.
      */
     public Element getElement() {
         return element;
     }
 
     /**
      * Return the issuer name.
      */
     public String getIssuer() {
         return issuer;
     }
 
     /**
      * Return the Serial Number.
      */
     public BigInteger getSerialNumber() {
         return serialNumber;
     }
 
     /**
      * return the string representation of the token.
      *
      * @return the string representation of the token.
      */
     public String toString() {
         return DOM2Writer.nodeToString(element);
     }
 
 }