package at.gv.egovernment.moa.spss.server.invoke;

import java.util.Collections;

import at.gv.egovernment.moa.spss.MOAException;
import at.gv.egovernment.moa.spss.api.Configurator;
import at.gv.egovernment.moa.spss.api.SignatureCreationService;
import at.gv.egovernment.moa.spss.api.xmlsign.CreateXMLSignatureRequest;
import at.gv.egovernment.moa.spss.api.xmlsign.CreateXMLSignatureResponse;

/**
 * An implementation of the <code>SignatureCreationService</code>, using
 * the <code>XMLSignatureCreationInvoker</code>.
 * 
 * @author Patrick Peck
 * @version $Id$
 */
public class SignatureCreationServiceImpl extends SignatureCreationService {

  /**
   * Create an XML signature.
   * 
   * @param request The <code>CreateXMLSignatureRequest</code> containing
   * information about the signature(s) to create.
   * @return The created signature(s).
   * @throws MOAException An error occurred creating the signature(s).
   */
  public CreateXMLSignatureResponse createXMLSignature(CreateXMLSignatureRequest request)
    throws MOAException {

    XMLSignatureCreationInvoker invoker =
      XMLSignatureCreationInvoker.getInstance();
    CreateXMLSignatureResponse response;

    try {
      Configurator.getInstance().init();
      ServiceContextUtils.setUpContexts();
      response = invoker.createXMLSignature(request, Collections.EMPTY_SET);
      return response;
    } finally {
      ServiceContextUtils.tearDownContexts();
    }
  }

}