/**
 * <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: DetachedSignator_1_0_0.java,v 1.1 2006/08/30 14:02:35 wprinz Exp $
 */
package at.knowcenter.wag.egov.egiz.framework.signators;

import java.io.UnsupportedEncodingException;

import at.knowcenter.wag.egov.egiz.PdfASID;
import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
import at.knowcenter.wag.egov.egiz.framework.SignResult;
import at.knowcenter.wag.egov.egiz.framework.Signator;
import at.knowcenter.wag.egov.egiz.framework.SignatorFactory;
import at.knowcenter.wag.egov.egiz.pdf.BinarySignature;
import at.knowcenter.wag.egov.egiz.pdf.IncrementalUpdateInformation;
import at.knowcenter.wag.egov.egiz.pdf.TablePos;

/**
 * This signator is just for testing purposes.
 * 
 * <p>
 * It doesn't modify the original document, but simply returns the XML signature
 * response as the signed document.
 * </p>
 * 
 * @author wprinz
 */
public class DetachedSignator_1_0_0 implements Signator
{
  /**
   * The Pdf-AS ID of this Signator.
   */
  public static final PdfASID MY_ID = new PdfASID(SignatorFactory.VENDOR, SignatorFactory.TYPE_TEST, SignatorFactory.VERSION_1_0_0);
  
  /**
   * The Mime Type.
   */
  public static final String MIME_TYPE = "text/xml";

  /**
   * Default constructor.
   */
  public DetachedSignator_1_0_0()
  {
    // Default constructor.
  }

  /**
   * @see at.knowcenter.wag.egov.egiz.framework.Signator#prepareSign(byte[],
   *      String, TablePos, boolean)
   */
  public IncrementalUpdateInformation prepareSign(byte[] pdf,
      String signature_type, TablePos pos, boolean has_SIG_ID) throws PresentableException
  {
    IncrementalUpdateInformation iui = new IncrementalUpdateInformation();
    iui.original_document = pdf;
    iui.signature_type = signature_type;
    iui.pos = pos;

    iui.document_text = BinarySignature.retrieveSignableTextFromData(iui.original_document, iui.original_document.length);

    return iui;
  }

  /**
   * @see at.knowcenter.wag.egov.egiz.framework.Signator#finishSign(at.knowcenter.wag.egov.egiz.pdf.IncrementalUpdateInformation)
   */
  public SignResult finishSign(IncrementalUpdateInformation iui) throws PresentableException
  {
    try
    {
      String response = iui.signed_signature_object.getRawSignatureResponse();
      byte[] response_bytes = response.getBytes("UTF-8");

      SignResult sign_result = new SignResult(MIME_TYPE, response_bytes);
      return sign_result;
    }
    catch (UnsupportedEncodingException e)
    {
      e.printStackTrace();
      throw new PDFDocumentException(300, e);
    }
  }

}