1 files changed, 148 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/helper/DataSourceHelper.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/helper/DataSourceHelper.java
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+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/helper/DataSourceHelper.java
@@ -0,0 +1,148 @@
+/**
+ * <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.
+ */
+package at.gv.egiz.pdfas.impl.input.helper;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import at.gv.egiz.pdfas.performance.PerformanceCounters;
+import at.gv.egiz.pdfas.framework.input.DataSource;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * @author wprinz
+ * 
+ */
+public class DataSourceHelper
+{
+  /**
+   * The log.
+   */
+  private static final Log log = LogFactory.getLog(DataSourceHelper.class);
+
+  /**
+   * Converts a PdfDataSource to a byte array.
+   * 
+   * <p>
+   * Note that this function is very memory intensive. Use the Streams whereever
+   * possible.
+   * </p>
+   * 
+   * @deprecated
+   * 
+   * @param pdfDataSource
+   * @return
+   * @throws IOException
+   */
+  public static byte[] convertDataSourceToByteArray(DataSource pdfDataSource)
+  {
+    return pdfDataSource.getAsByteArray();
+//    try
+//    {
+//      PerformanceCounters.byteArrays.increment();
+//
+//      byte[] data = new byte[pdfDataSource.getLength()];
+//
+//      int bytes_written = 0;
+//
+//      InputStream is = pdfDataSource.createInputStream();
+//      int n = 0;
+//      while ((n = is.read(data, bytes_written, data.length - bytes_written)) > 0)
+//      {
+//        bytes_written += n;
+//      }
+//      is.close();
+//
+//      assert bytes_written == data.length;
+//
+//      return data;
+//    }
+//    catch (IOException e)
+//    {
+//      log.error(e);
+//      throw new RuntimeException(e);
+//    }
+  }
+  
+  public static byte [] convertInputStreamToByteArray(InputStream inputStream)
+  {
+    try
+    {
+      return convertInputStreamToByteArrayIOEx(inputStream);
+    }
+    catch (IOException e)
+    {
+      log.error(e);
+      throw new RuntimeException(e);
+    }
+  }
+  
+  public static byte [] convertInputStreamToByteArrayIOEx(InputStream inputStream) throws IOException
+  {
+      PerformanceCounters.byteArrays.increment();
+
+      ByteArrayOutputStream baos = new ByteArrayOutputStream(4096);
+      
+      byte[] temp = new byte[4096];
+
+      int n = 0;
+      while ((n = inputStream.read(temp)) > 0)
+      {
+        baos.write(temp, 0, n);
+      }
+      inputStream.close();
+
+      baos.close();
+      byte [] data = baos.toByteArray();
+      
+      return data;
+  }
+  
+  public static void debugDataSourceToFile(DataSource dataSource, File file)
+  {
+    try
+    {
+      InputStream is = dataSource.createInputStream();
+      FileOutputStream fos = new FileOutputStream(file);
+      byte[] data = new byte[2048];
+      int n = -1;
+      while ((n = is.read(data)) > 0)
+      {
+        fos.write(data, 0, n);
+      }
+      is.close();
+      fos.close();
+    }
+    catch (IOException e)
+    {
+      log.error(e);
+    }
+  }
+}