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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: PDFSignatureCreation.java,v 1.6 2006/10/31 08:09:33 wprinz Exp $
+ */
+package at.knowcenter.wag.egov.egiz.pdf;
+
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+
+import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;
+import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
+import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;
+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;
+
+/**
+ * This class provides wrapper methods to get an access to abstract PDF documents (PDFSignator).
+ * There exists many open source libraries and commercial libraries that can implement the abstract
+ * interface. <br>
+ * This class is to load the corresponding implementation of an abstract PDFSignator class. Therefor
+ * it seams to be a factory. The factory settings are read from the configuration file calling the
+ * SettingsReader.
+ *
+ * @author wlackner
+ * @see at.knowcenter.wag.egov.egiz.cfg.SettingsReader
+ */
+public class PDFSignatureCreation {
+ /**
+ * The abstract signature object
+ */
+ private SignatureObject sigObject_ = null;
+ /**
+ * The abstract pdf siganture object
+ */
+ private PDFSignatureObject pdfSigObject_ = null;
+ /**
+ * The SettingsReader instance
+ */
+ private SettingsReader settings_ = null;
+ /**
+ * The factory class prefix
+ */
+ private final static String CLASS_PREFIX = ".PDFSignatureObject";
+ /**
+ * The factory class prefix of the default library
+ */
+ protected final static String DEFAULT_LIBRARY = "IText";
+ /**
+ * The settings key defined in the settings file
+ *
+ * @see SettingsReader
+ */
+ protected final static String SETTINGS_KEY = "pdf.signature.library";
+ /**
+ * The logger definition.
+ */
+ private static final Logger logger_ = ConfigLogger.getLogger(PDFSignatureCreation.class);
+
+ /**
+ * Load the configuration settings. Load the corresponding class implementation for the abstract
+ * PDFSignature class. Init with a signature object.
+ *
+ * @param sigObject the native signature object
+ * @throws PDFDocumentException ErrorCode:101
+ */
+ public PDFSignatureCreation(SignatureObject sigObject) throws PDFDocumentException {
+// try {
+ loadSettings();
+// } catch (PDFDocumentException e) {
+// e.setErrorCode(101);
+// throw e;
+// }
+ sigObject_ = sigObject;
+ }
+
+ /**
+ * Load the factory implementation. This method trys to load the configured PDF library.
+ *
+ * @throws PDFDocumentException
+ */
+ private PDFSignatureObject createPDFSignatureObject() throws PDFDocumentException {
+ PDFSignatureObject pdf_sig_object = null;
+ String class_name = this.getClass().getPackage().getName() + getClassName();
+ Class pdf_sig_obj_class = null;
+ try {
+ pdf_sig_obj_class = Class.forName(class_name);
+ } catch (ClassNotFoundException e) {
+ if (logger_.isEnabledFor(Level.FATAL)) {
+ logger_.fatal("Class not found:" + class_name);
+ }
+ throw new PDFDocumentException(203, "Can not load pdf signator library", e);
+ }
+ try {
+ pdf_sig_object = (PDFSignatureObject) pdf_sig_obj_class.newInstance();
+ } catch (InstantiationException e) {
+ if (logger_.isEnabledFor(Level.FATAL)) {
+ logger_.fatal("Can not instantiate:" + class_name);
+ }
+ throw new PDFDocumentException(203, "Can not load pdf signator library", e);
+ } catch (IllegalAccessException e) {
+ if (logger_.isEnabledFor(Level.FATAL)) {
+ logger_.fatal("Can not access:" + class_name);
+ }
+ throw new PDFDocumentException(203, "Can not load pdf signator library", e);
+ }
+ return pdf_sig_object;
+ }
+
+ /**
+ * load the class settings
+ *
+ * @throws PDFDocumentException
+ * @see SettingsReader
+ */
+ private void loadSettings() throws PDFDocumentException {
+ if (settings_ == null) {
+ try {
+ settings_ = SettingsReader.getInstance();
+ } catch (SettingsException e) {
+ String log_message = "Can not load pdf signature settings. Cause:\n" + e.getMessage();
+ logger_.error(log_message);
+ throw new PDFDocumentException(101, log_message, e);
+ }
+ }
+ }
+
+ /**
+ * Read the class postfix from the configuration file
+ *
+ * @return the full qualified class name
+ */
+ private String getClassName() {
+ String extract_class = settings_.getSetting(SETTINGS_KEY, DEFAULT_LIBRARY);
+ return CLASS_PREFIX + extract_class;
+ }
+
+ /**
+ * Creates a new pdf signature object using the configured pdf library.
+ *
+ * @return a new pdf signature object
+ * @throws PDFDocumentException ErrorCode:203
+ */
+ public PDFSignatureObject getPDFSignatureObject() throws PDFDocumentException {
+ if (pdfSigObject_ == null) {
+// try {
+ pdfSigObject_ = createPDFSignatureObject();
+// } catch (PDFDocumentException e) {
+// e.setErrorCode(203);
+// throw e;
+// }
+ pdfSigObject_.setSignatorObject(sigObject_);
+ }
+ return pdfSigObject_;
+ }
+} \ No newline at end of file