From 9ef042419014ebe9ea3e6ce0af5568de2d933c7d Mon Sep 17 00:00:00 2001
From: netconomy <netconomy@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Mon, 17 Dec 2007 15:43:39 +0000
Subject: Change Request "Document Correction"

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@239 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 .../framework/input/correction/Corrector.java      | 41 +++++++++++++++++++++
 .../input/correction/CorrectorFactory.java         | 43 ++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/correction/Corrector.java
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/correction/CorrectorFactory.java

(limited to 'src/main/java/at/gv/egiz/pdfas/framework')

diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/correction/Corrector.java b/src/main/java/at/gv/egiz/pdfas/framework/input/correction/Corrector.java
new file mode 100644
index 0000000..3b4d4b4
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/correction/Corrector.java
@@ -0,0 +1,41 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input.correction;
+
+import at.gv.egiz.pdfas.exceptions.framework.CorrectorException;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+
+/**
+ * Interface for PDF corretors.
+ * 
+ * <p>
+ * Often PDF documents generated by various document to PDF converters have an
+ * invalid structure that upsets PDF-AS. The correction mechanism allows these
+ * documents to be corrected before being signed.
+ * </p>
+ * <p>
+ * A PDF corrector takes an incorrect PDF document and transforms it into a
+ * correct one.
+ * </p>
+ * <p>
+ * Note that correcting a document destroys all signatures in that document, so
+ * never correct an already signed document.
+ * </p>
+ * 
+ * @author wprinz
+ */
+public interface Corrector
+{
+  /**
+   * Corrects the given PDF document to a form that PDF-AS can use.
+   * 
+   * @param document
+   *          The (incorrect) PDF document.
+   * @return Returns the corrected PDF document.
+   * @throws CorrectorException
+   *           Exception thrown if the document couldn't be corrected.
+   */
+  public PdfDataSource correctDocument(PdfDataSource document) throws CorrectorException;
+
+}
diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/correction/CorrectorFactory.java b/src/main/java/at/gv/egiz/pdfas/framework/input/correction/CorrectorFactory.java
new file mode 100644
index 0000000..083713f
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/correction/CorrectorFactory.java
@@ -0,0 +1,43 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input.correction;
+
+import at.gv.egiz.pdfas.impl.input.correction.ExternalCorrector;
+import at.gv.egiz.pdfas.impl.input.correction.InternalCorrector;
+import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;
+
+/**
+ * Factory for creating Correctors.
+ * 
+ * @author wprinz
+ */
+public class CorrectorFactory
+{
+  public static final String INTERNAL_CORRECTOR = "internal";
+
+  public static final String EXTERNAL_CORRECTOR = "external";
+  
+  public static final String CORRECTOR_KEY = "corrector";
+
+  public static Corrector createCorrector(String id) throws SettingsException
+  {
+    if (id.equals(INTERNAL_CORRECTOR))
+    {
+      return new InternalCorrector();
+    }
+    if (id.equals(EXTERNAL_CORRECTOR))
+    {
+      return new ExternalCorrector();
+    }
+    throw new SettingsException("The connector id '" + id + "' is not a valid corrector id.");
+  }
+
+  public static Corrector createCorrector() throws SettingsException
+  {
+    String id = SettingsReader.getInstance().getSetting(CORRECTOR_KEY, INTERNAL_CORRECTOR);
+    return createCorrector(id);
+  }
+
+}
-- 
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