1 files changed, 150 insertions, 0 deletions
diff --git a/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/FileBasedPdfDataSourceImpl.java b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/FileBasedPdfDataSourceImpl.java
new file mode 100644
index 0000000..a710c3c
--- /dev/null
+++ b/pdf-as-lib/src/main/java/at/gv/egiz/pdfas/impl/input/FileBasedPdfDataSourceImpl.java
@@ -0,0 +1,150 @@
+/**
+ * <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;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+import at.gv.egiz.pdfas.impl.input.helper.DataSourceHelper;
+
+/**
+ * @author wprinz
+ * 
+ */
+public class FileBasedPdfDataSourceImpl implements PdfDataSource, FileBased
+{
+  /**
+   * The log.
+   */
+  private static final Log log = LogFactory.getLog(FileBasedPdfDataSourceImpl.class);
+
+  /**
+   * The underlying file.
+   */
+  protected File inputFile = null;
+
+  protected int length = -1;
+
+  /**
+   * Constructor that creates this PdfDataSource backed by a file in the file
+   * system.
+   * 
+   * @param file
+   *          The input File.
+   * @param length
+   *          The length of the InputStream. The is the maximum number of bytes
+   *          that can be read from the stream.
+   * @throws IOException
+   *           Thrown if the file cannot be read properly.
+   */
+  public FileBasedPdfDataSourceImpl(File file, int length) throws IOException
+  {
+
+    if (!file.exists())
+    {
+      throw new FileNotFoundException("The file '" + file + "' does not exist.");
+    }
+    // for some reason the isFile is not always correct...
+    // if (file.isFile())
+    // {
+    // throw new IOException("The file '" + file + "' is not a normal file.");
+    // }
+    if (!file.canRead())
+    {
+      throw new IOException("The file '" + file + "' cannot be read.");
+    }
+
+    this.inputFile = file;
+    this.length = length;
+  }
+
+  /**
+   * @see at.gv.egiz.pdfas.impl.input.FileBased#getFile()
+   */
+  public File getFile()
+  {
+    return this.inputFile;
+  }
+
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.PdfDataSource#createInputStream()
+   */
+  public InputStream createInputStream()
+  {
+    if (cache == null)
+    {
+      getAsByteArray();
+    }
+    return new ByteArrayInputStream(cache);
+  }
+
+  protected InputStream createFileInputStream()
+  {
+    try
+    {
+      FileInputStream fis = new FileInputStream(getFile());
+      DelimitedInputStream dis = new DelimitedInputStream(fis, getLength());
+      return dis;
+    }
+    catch (IOException e)
+    {
+      log.error("Couldn't create InputStream for file " + getFile() + ". Returning null.", e);
+
+      return null;
+    }
+  }
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.PdfDataSource#getLength()
+   */
+  public int getLength()
+  {
+    return this.length;
+  }
+  
+  byte [] cache = null;
+  
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.DataSource#getAsByteArray()
+   */
+  public byte[] getAsByteArray()
+  {
+    if (cache != null)
+    {
+      return cache;
+    }
+    
+    cache = DataSourceHelper.convertInputStreamToByteArray(createFileInputStream());
+    
+    return cache;
+  }
+
+}