org.jmrtd.lds.AbstractLDSInfo Maven / Gradle / Ivy

/*
 * JMRTD - A Java API for accessing machine readable travel documents.
 *
 * Copyright (C) 2006 - 2018  The JMRTD team
 *
 * 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
 *
 * $Id: AbstractLDSInfo.java 1751 2018-01-15 15:35:45Z martijno $
 */

package org.jmrtd.lds;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Base class for data structures that are contained in files in the LDS.
 *
 * @author The JMRTD team ([email protected])
 *
 * @version $Revision: 1751 $
 */
public abstract class AbstractLDSInfo implements LDSElement {

  private static final Logger LOGGER = Logger.getLogger("org.jmrtd");

  private static final long serialVersionUID = -2340098256249194537L;

  /**
   * Returns an encoding of this LDS info.
   *
   * @return the LDS info encoded as byte array
   */
  public byte[] getEncoded() {
    try {
      ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
      writeObject(outputStream);
      outputStream.flush();
      return outputStream.toByteArray();
    } catch (IOException ioe) {
      LOGGER.log(Level.WARNING, "Exception: ", ioe);
      return null;
    }
  }

  /**
   * Writes this LDS info to a stream.
   *
   * @param outputStream the stream to write to
   *
   * @throws IOException on error writing to the stream
   */
  public abstract void writeObject(OutputStream outputStream) throws IOException;
}