/**
 * <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.
 *
 * $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.gv.egiz.pdfas.framework.input.DataSource;
import at.gv.egiz.pdfas.framework.input.PdfDataSource;
import at.gv.egiz.pdfas.impl.input.TextDataSourceImpl;
import at.knowcenter.wag.egov.egiz.PdfAS;
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.IncrementalUpdateInformation;
import at.knowcenter.wag.egov.egiz.pdf.TablePos;
import at.knowcenter.wag.egov.egiz.sig.SignatureDataImpl;
import at.knowcenter.wag.egov.egiz.sig.connectors.bku.BKUPostConnection;

/**
 * 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);
  
  /**
   * @see at.knowcenter.wag.egov.egiz.framework.Signator#getMyId()
   */
  public PdfASID getMyId()
  {
    return MY_ID;
  }

  /**
   * The Mime Type.
   */
  public static final String MIME_TYPE = "text/xml"; //$NON-NLS-1$

  /**
   * 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(PdfDataSource 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;    

    String document_text = PdfAS.extractNormalizedTextTextual(pdf);
    iui.nonTextObjectInfos = PdfAS.extractNonTextualObjects(pdf);
    // logger_.debug("signed_text = " + document_text);
    
    DataSource ds = new TextDataSourceImpl(document_text);
    iui.signature_data = new SignatureDataImpl(ds, MIME_TYPE, "UTF-8"); //$NON-NLS-1$ //$NON-NLS-2$

    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.response_properties.getProperty(BKUPostConnection.RESPONSE_STRING_KEY);
      byte[] response_bytes = response.getBytes("UTF-8"); //$NON-NLS-1$

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

}