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diff --git a/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/SignatureHolder.java b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/pdf/SignatureHolder.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.
+ *
+ * $Id: SignatureHolder.java,v 1.3 2006/10/11 07:57:58 wprinz Exp $
+ */
+package at.knowcenter.wag.egov.egiz.pdf;
+
+import at.gv.egiz.pdfas.framework.input.DataSource;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
+
+/**
+ * Data structure that holds the information of one signature block, which is
+ * the signed/signable text and the corresponding SignatureObject.
+ * 
+ * <p>
+ * Signators and Verifiactors should implement own classes for this interface
+ * that generate the text to be signed from the underlying data. For example a
+ * binary signature holder could generate the text to be signed by Base64
+ * encoding the binary data. Furthermore this allows to cache the text to be
+ * signed.
+ * </p>
+ * 
+ * @author wprinz
+ */
+public interface SignatureHolder
+{
+
+//  /**
+//   * Returns the signed text (verification) or the to-be-signed signable text
+//   * (signation).
+//   * 
+//   * <p>
+//   * Note that this text must be the one that was actually signed. This text is
+//   * directly passed to the connector for signation/verification. No
+//   * normalization or modification will be / must be done to this text between
+//   * reading out from the signature holder and passing the text to the
+//   * connector.
+//   * </p>
+//   * 
+//   * @return Returns the signed text or the to-be-signed signable text.
+//   */
+//  public String getSignedText();
+
+  /**
+   * 
+   * @return Returns the SignatureObject containing the issuer, serial number,
+   *         etc.
+   */
+  public SignatureObject getSignatureObject();
+
+  /**
+   * Returns the DataSource providing the data.
+   * @return
+   */
+  public DataSource getDataSource();
+}
+\ No newline at end of file