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diff --git a/src/main/java/at/gv/egiz/pdfas/framework/signator/Signator.java b/src/main/java/at/gv/egiz/pdfas/framework/signator/Signator.java
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+++ b/src/main/java/at/gv/egiz/pdfas/framework/signator/Signator.java
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+/**
+ * <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: Signator.java,v 1.1 2006/08/25 17:07:21 wprinz Exp $
+ */
+package at.gv.egiz.pdfas.framework.signator;
+
+import at.gv.egiz.pdfas.exceptions.framework.SignatorException;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+import at.gv.egiz.pdfas.framework.output.DataSink;
+import at.knowcenter.wag.egov.egiz.PdfASID;
+import at.knowcenter.wag.egov.egiz.framework.SignResult;
+import at.knowcenter.wag.egov.egiz.pdf.TablePos;
+
+/**
+ * The basic interface for signator algorithms.
+ * 
+ * @author wprinz
+ */
+public interface Signator
+{
+  /**
+   * Returns the PdfASID of this Connector.
+   * 
+   * <p>
+   * This should always return the MY_ID static field of the connector. Dont't
+   * forget to override this.
+   * </p>
+   * <p>
+   * Within connector code always use this method so that code reuse through
+   * derivation can take place correctly.
+   * </p>
+   * 
+   * @return Returns the PdfASID of this Connector.
+   */
+  public PdfASID getMyId();
+
+
+  public SignatorInformation prepareSign(PdfDataSource pdfDataSource,
+      String profile, TablePos pos, boolean has_SIG_ID) throws SignatorException;
+
+
+  public void finishSign(SignatorInformation signatorInformation, DataSink dataSink) throws SignatorException;
+}