1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/at/gv/egiz/pdfas/impl/input/CompoundPdfDataSourceImpl.java b/src/main/java/at/gv/egiz/pdfas/impl/input/CompoundPdfDataSourceImpl.java
new file mode 100644
index 0000000..f77d6be
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/impl/input/CompoundPdfDataSourceImpl.java
@@ -0,0 +1,47 @@
+/**
+ * 
+ */
+package at.gv.egiz.pdfas.impl.input;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.io.SequenceInputStream;
+
+import at.gv.egiz.pdfas.framework.input.DataSource;
+import at.gv.egiz.pdfas.framework.input.PdfDataSource;
+
+/**
+ * @author wprinz
+ *
+ */
+public class CompoundPdfDataSourceImpl implements PdfDataSource
+{
+  protected DataSource originalDataSource = null;
+  
+  protected byte[] appendix = null;
+  
+  public CompoundPdfDataSourceImpl (PdfDataSource original, byte [] appendix)
+  {
+    this.originalDataSource = original;
+    this.appendix = appendix;
+  }
+
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.DataSource#createInputStream()
+   */
+  public InputStream createInputStream()
+  {
+    ByteArrayInputStream bais = new ByteArrayInputStream(this.appendix);
+    SequenceInputStream sis = new SequenceInputStream(this.originalDataSource.createInputStream(), bais);
+    return sis;
+  }
+
+  /**
+   * @see at.gv.egiz.pdfas.framework.input.DataSource#getLength()
+   */
+  public int getLength()
+  {
+    return this.originalDataSource.getLength() + this.appendix.length;
+  }
+
+}