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diff --git a/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/sig/signatureobject/SignatureObjectHelper.java b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/sig/signatureobject/SignatureObjectHelper.java
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+++ b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/sig/signatureobject/SignatureObjectHelper.java
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+/**
+ * <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.knowcenter.wag.egov.egiz.sig.signatureobject;
+
+import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.knowcenter.wag.egov.egiz.PdfASID;
+import at.knowcenter.wag.egov.egiz.exceptions.SignatureException;
+import at.knowcenter.wag.egov.egiz.exceptions.SignatureTypesException;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
+import at.knowcenter.wag.egov.egiz.sig.X509Cert;
+import at.knowcenter.wag.egov.egiz.sig.connectors.bku.SignSignatureObject;
+
+/**
+ * Contains helper methods for dealing with signature objects.
+ * 
+ * @author wprinz
+ *
+ */
+public final class SignatureObjectHelper
+{
+
+  public static SignatureObject convertSignSignatureObjectToSignatureObject (SignSignatureObject sso, String signature_type) throws SignatureTypesException, SignatureException
+  {
+    SignatureObject so = new SignatureObject();
+    so.setSigType(signature_type);
+    so.initByType();
+    so.setSignationDate(sso.getDate());
+    so.setSignationIssuer(sso.getIssuer());
+    so.setSignationSerialNumber(sso.getSerialNumber());
+    so.setSignationValue(sso.getSignatureValue());
+    so.setSignationIDs(sso.getSigID());
+    so.setKZ(new PdfASID(sso.getSigKZ()));
+    so.setSignationName(sso.getName());
+    
+    so.setSigAlg(sso.getSigAlgorithm());
+    
+    so.setX509Certificate(sso.getX509Certificate());
+
+    return so;
+  }
+  
+  public static SignSignatureObject convertSignatureObjectToSignSignatureObject (SignatureObject so) throws SignatureException
+  {
+    SignSignatureObject sso = new SignSignatureObject();
+    sso.date = so.getSignationDate();
+    sso.signatureValue = so.getSignationValue();
+    sso.issuer = so.getSignationIssuer();
+    X509Cert cert = so.getX509Cert();
+    if (cert == null)
+    {
+      throw new SignatureException(ErrorCode.CERTIFICATE_NOT_FOUND, "so.getX509Cert returned null. No cert found.");
+    }
+    sso.x509Certificate = cert.getX509Certificate();
+    sso.id = so.getSignationIds();
+    sso.kz = so.getKZ() == null ? null : so.getKZ().toString();
+    sso.sigAlgorithm = so.getSigAlg();
+
+    return sso;
+  }
+}