From 3d982813b34f6f230baf4a467cdc37ec92a77595 Mon Sep 17 00:00:00 2001
From: netconomy <netconomy@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Fri, 17 Aug 2007 06:10:56 +0000
Subject: Performance

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@167 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 .../gv/egiz/pdfas/framework/input/DataSource.java  | 35 ++++++++++++
 .../pdfas/framework/input/ExtractionStage.java     | 66 ++++++++++++++++++++++
 .../egiz/pdfas/framework/input/PdfDataSource.java  | 21 +++++++
 .../egiz/pdfas/framework/input/TextDataSource.java | 19 +++++++
 4 files changed, 141 insertions(+)
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/ExtractionStage.java
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/PdfDataSource.java
 create mode 100644 src/main/java/at/gv/egiz/pdfas/framework/input/TextDataSource.java

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

diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java b/src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java
new file mode 100644
index 0000000..265cb0c
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java
@@ -0,0 +1,35 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input;
+
+import java.io.InputStream;
+
+/**
+ * The input document data source.
+ * 
+ * <p>
+ * Usually this is a PdfDataSource, but it may be a TextDataSource as well.
+ * </p>
+ * 
+ * @author wprinz
+ * 
+ */
+public interface DataSource
+{
+  /**
+   * Creates a new InputStream that allows to read out the document's binary
+   * data from the beginning.
+   * 
+   * @return Returns the InputStream with the binary data.
+   */
+  public InputStream createInputStream();
+
+  /**
+   * Returns the length (number of bytes) of the stream.
+   * 
+   * @return Returns the length (number of bytes) of the stream.
+   */
+  public int getLength();
+
+}
diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/ExtractionStage.java b/src/main/java/at/gv/egiz/pdfas/framework/input/ExtractionStage.java
new file mode 100644
index 0000000..36d9bd8
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/ExtractionStage.java
@@ -0,0 +1,66 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input;
+
+import java.util.List;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import at.gv.egiz.pdfas.exceptions.ErrorCode;
+import at.gv.egiz.pdfas.exceptions.framework.VerificationFilterException;
+import at.gv.egiz.pdfas.framework.vfilter.VerificationFilter;
+import at.gv.egiz.pdfas.framework.vfilter.VerificationFilterParameters;
+import at.gv.egiz.pdfas.impl.input.IncrementalUpdateParser;
+import at.gv.egiz.pdfas.impl.vfilter.VerificationFilterImpl;
+import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;
+import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;
+
+/**
+ * Extracts all signatures from a given input DataSource.
+ * 
+ * @author wprinz
+ */
+public class ExtractionStage
+{
+  /**
+   * The log.
+   */
+  private static final Log log = LogFactory.getLog(ExtractionStage.class);
+
+  public List extractSignatureHolders(final DataSource dataSource, VerificationFilterParameters parameters) throws PresentableException
+  {
+    if (dataSource instanceof PdfDataSource)
+    {
+      PdfDataSource pdfDataSource = (PdfDataSource) dataSource;
+
+      List blocks = parsePdfIntoBlocks(pdfDataSource);
+
+      VerificationFilter vf = new VerificationFilterImpl();
+      List signatures = vf.extractSignatureHolders(pdfDataSource, blocks, parameters);
+
+      return signatures;
+    }
+
+    if (dataSource instanceof TextDataSource)
+    {
+      TextDataSource textDataSource = (TextDataSource) dataSource;
+
+      VerificationFilter vf = new VerificationFilterImpl();
+      List signatures = vf.extractSignaturHolders(textDataSource, parameters);
+
+      return signatures;
+    }
+
+    String msg = "The input DataSource is neither pdf nor text. class.name = " + dataSource.getClass().getName();
+    log.error(msg);
+    throw new VerificationFilterException(ErrorCode.DOCUMENT_CANNOT_BE_READ, msg);
+  }
+
+  protected List parsePdfIntoBlocks(PdfDataSource pdfDataSource) throws PDFDocumentException
+  {
+    List blocks = IncrementalUpdateParser.parsePdfIntoIUBlocks(pdfDataSource);
+    return blocks;
+  }
+}
diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/PdfDataSource.java b/src/main/java/at/gv/egiz/pdfas/framework/input/PdfDataSource.java
new file mode 100644
index 0000000..b03a67e
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/PdfDataSource.java
@@ -0,0 +1,21 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input;
+
+
+/**
+ * Represents the binary data of a PDF document.
+ * 
+ * <p>
+ * This interface allows Pdf data to be handled in an abstract way so that the
+ * storage (byta array, disk etc.) of pdf documents can be separated from the
+ * algorithms.
+ * </p>
+ * 
+ * @author wprinz
+ */
+public interface PdfDataSource extends DataSource
+{
+  // jsut a marker interface
+}
diff --git a/src/main/java/at/gv/egiz/pdfas/framework/input/TextDataSource.java b/src/main/java/at/gv/egiz/pdfas/framework/input/TextDataSource.java
new file mode 100644
index 0000000..c5fd4b1
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/TextDataSource.java
@@ -0,0 +1,19 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.framework.input;
+
+/**
+ * Represents a free-text input text to be processed.
+ *  
+ * @author wprinz
+ */
+public interface TextDataSource extends DataSource
+{
+  /**
+   * Returns the text to be processed.
+   * @return Returns the text to be processed.
+   */
+  public String getText();
+
+}
-- 
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