/**
 * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
 * 
 * This software is the confidential and proprietary information of Know-Center,
 * Graz, Austria. You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with Know-Center.
 * 
 * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 * 
 * $Id: PdfASID.java,v 1.1 2006/08/25 17:04:16 wprinz Exp $
 */
package at.knowcenter.wag.egov.egiz;

import java.io.Serializable;

import at.knowcenter.wag.egov.egiz.exceptions.InvalidIDException;

/**
 * This class encapsulates the Pdf-AS ID ("Kennzeichnung") urn.
 * 
 * @author wprinz
 */
public class PdfASID implements Serializable
{

  /**
   * SVUID.
   */
  private static final long serialVersionUID = 4776635173830445739L;

  /**
   * The urn word that leads in the identifier.
   */
  protected static final String URN = "urn";

  /**
   * The namespace of the urn.
   */
  protected static final String NAMESPACE = "pdfsigfilter";

  /**
   * The separator between urn blocks.
   */
  protected static final String SPLIT_STRING = ":";

  /**
   * The vendor.
   */
  protected String vendor = null;

  /**
   * The algorithm type.
   */
  protected String type = null;

  /**
   * The version of the algorithm.
   */
  protected String version = null;

  /**
   * Constructor that fills in the parameters directly.
   * 
   * @param vendor
   * @param type
   * @param version
   */
  public PdfASID(String vendor, String type, String version)
  {
    set(vendor, type, version);
  }

  /**
   * Parses the given id String and throws an Exception if it is not valid.
   * 
   * @param id
   *          The id String to be parsed.
   */
  public PdfASID(String id) throws InvalidIDException
  {
    String[] tokens = id.split(SPLIT_STRING);

    if (tokens.length != 5)
    {
      throw new InvalidIDException(800, "The doesn't have enough tokens (" + id + ")");
    }

    if (!tokens[0].equals(URN))
    {
      throw new InvalidIDException(800, "The id must start with " + URN + " (" + id + ")");
    }

    if (!tokens[1].equals(NAMESPACE))
    {
      throw new InvalidIDException(800, "The namespace of the id must be " + NAMESPACE + " (" + id + ")");
    }

    set(tokens[2], tokens[3], tokens[4]);
  }

  /**
   * Copy Constructor.
   * 
   * @param other
   *          The other PdfASID to copy the data from.
   */
  public PdfASID(final PdfASID other)
  {
    set(other.vendor, other.type, other.version);
  }

  /**
   * Auxiliary constructor.
   * 
   * @param vendor
   *          The vendor.
   * @param type
   *          The type.
   * @param version
   *          The version.
   */
  private void set(String vendor, String type, String version)
  {
    this.vendor = vendor;
    this.type = type;
    this.version = version;
  }

  /**
   * Returns the type.
   * 
   * @return Returns the type.
   */
  public String getType()
  {
    return this.type;
  }

  /**
   * Returns the vendor.
   * 
   * @return Returns the vendor.
   */
  public String getVendor()
  {
    return this.vendor;
  }

  /**
   * Returns the version.
   * 
   * @return Returns the version.
   */
  public String getVersion()
  {
    return this.version;
  }

  /**
   * @see java.lang.Object#toString()
   */
  public String toString()
  {
    return URN + SPLIT_STRING + NAMESPACE + SPLIT_STRING + this.vendor + SPLIT_STRING + this.type + SPLIT_STRING + this.version;
  }

}