/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * Copyright  1999-2004 The Apache Software Foundation.

 *

 *  Licensed 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 com.sun.org.apache.xml.internal.security.keys.storage.implementations;

import java.security.cert.X509Certificate;

import java.util.Iterator;

import com.sun.org.apache.xml.internal.security.keys.storage.StorageResolverSpi;

/**

 * This {@link StorageResolverSpi} makes a single {@link X509Certificate}

 * available to the {@link com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver}.

 *

 * @author $Author: mullan $

 */

public class SingleCertificateResolver extends StorageResolverSpi {

   /** Field _certificate */

   X509Certificate _certificate = null;

   /** Field _iterator */

   /**

    *

    *

    * @param x509cert the single {@link X509Certificate}

    */

   public SingleCertificateResolver(X509Certificate x509cert) {

      this._certificate = x509cert;

      this._iterator = new InternalIterator(this._certificate);

   }

   /** @inheritDoc */

      return this._iterator;

   }

   /**

    * Class InternalIterator

    *

    * @author $Author: mullan $

    * @version $Revision: 1.5 $

    */

      /** Field _alreadyReturned */

      boolean _alreadyReturned = false;

      /** Field _certificate */

      X509Certificate _certificate = null;

      /**

       * Constructor InternalIterator

       *

       * @param x509cert

       */

      public InternalIterator(X509Certificate x509cert) {

         this._certificate = x509cert;

      }

      /** @inheritDoc */

      public boolean hasNext() {

         return (!this._alreadyReturned);

      }

      /** @inheritDoc */

         this._alreadyReturned = true;

         return this._certificate;

      }

      /**

       * Method remove

       *

       */

      public void remove() {

         throw new UnsupportedOperationException(

            "Can't remove keys from KeyStore");

      }

   }

}