/**
 * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
 * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
 * joint initiative of the Federal Chancellery Austria and Graz University of
 * Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egiz.pdfas.framework;

import at.knowcenter.wag.egov.egiz.PdfASID;
import at.knowcenter.wag.egov.egiz.exceptions.SignatorFactoryException;
import at.gv.egiz.pdfas.impl.signator.binary.BinarySignator_1_0_0;
import at.gv.egiz.pdfas.impl.signator.binary.BinarySignator_1_1_0;
import at.gv.egiz.pdfas.impl.signator.detached.DetachedTextualSignator_1_0_0;
import at.gv.egiz.pdfas.impl.signator.textual.TextualSignator_1_0_0;
import at.gv.egiz.pdfas.impl.signator.textual.TextualSignator_1_1_0;
import at.gv.egiz.pdfas.impl.signator.textual.TextualSignator_1_2_0;
import at.gv.egiz.pdfas.framework.signator.Signator;

/**
 * @author wprinz
 *
 */
public class SignatorFactory
{
  /**
   * The Vendor.
   */
  public static final String VENDOR = "bka.gv.at"; //$NON-NLS-1$

  /**
   * The binary Signator algorithm.
   */
  public static final String TYPE_BINARY = "binaer"; //$NON-NLS-1$

  /**
   * The textual Signator algorithm.
   */
  public static final String TYPE_TEXTUAL = "text"; //$NON-NLS-1$
  
  /**
   * Detached Signator.
   */
  public static final String TYPE_DETACHED_TEXTUAL = "detachedtext"; //$NON-NLS-1$

  /**
   * This application's current algorithm versions.
   */
  public static final String VERSION_1_0_0 = "v1.0.0"; //$NON-NLS-1$

  /**
   * This application's current algorithm versions.
   */
  public static final String VERSION_1_1_0 = "v1.1.0"; //$NON-NLS-1$
  
  /**
   * This application's current algorithm versions.
   */
  public static final String VERSION_1_2_0 = "v1.2.0"; //$NON-NLS-1$

  
  public static Signator createSignator (PdfASID id) throws SignatorFactoryException
  {
    if (!id.getVendor().equals(VENDOR))
    {
      throw new SignatorFactoryException("The vendor '" + id.getVendor() + "' is unrecognized by this SignatorFactory. (id='" + id + "')"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    }

    if (id.getType().equals(TYPE_BINARY))
    {
      if (id.getVersion().equals(VERSION_1_0_0))
      {
        return new BinarySignator_1_0_0();
      }
      if (id.getVersion().equals(VERSION_1_1_0))
      {
        return new BinarySignator_1_1_0();
      }

      throw new SignatorFactoryException("The version '" + id.getVersion() + "' of type '" + id.getType() + "' is not supported by this SignatorFactory. (id='" + id + "')"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
    }

    if (id.getType().equals(TYPE_TEXTUAL))
    {
      if (id.getVersion().equals(VERSION_1_0_0))
      {
        return new TextualSignator_1_0_0();
      }
      if (id.getVersion().equals(VERSION_1_1_0))
      {
        return new TextualSignator_1_1_0();
      }
      if (id.getVersion().equals(VERSION_1_2_0))
      {
        return new TextualSignator_1_2_0();
      }


      throw new SignatorFactoryException("The version '" + id.getVersion() + "' of type '" + id.getType() + "' is not supported by this SignatorFactory. (id='" + id + "')"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
    }

    if (id.getType().equals(TYPE_DETACHED_TEXTUAL))
    {
      if (id.getVersion().equals(VERSION_1_0_0))
      {
        return new DetachedTextualSignator_1_0_0();
      }
      
      throw new SignatorFactoryException("The version '" + id.getVersion() + "' of type '" + id.getType() + "' is not supported by this SignatorFactory. (id='" + id + "')"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
    }

    throw new SignatorFactoryException("The type '" + id.getType() + "' is not supported by this SignatorFactory. (id='" + id + "')"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  }

}