2 files changed, 19 insertions, 0 deletions
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
index 265cb0c..fcf55b8 100644
--- a/src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java
+++ b/src/main/java/at/gv/egiz/pdfas/framework/input/DataSource.java
@@ -32,4 +32,19 @@ public interface DataSource
    */
   public int getLength();
 
+  /**
+   * Returns the data of this DataSource as a byte array.
+   * 
+   * <p>
+   * Calling this method indicates that you need a byte array for random <strong>read</strong> access.
+   * The DataSource implementation should of course cache this byte array to avoid too much memory usage.
+   * </p>
+   * <p>
+   * Performance analysis has shown that the libraries internally convert the streams to byte arrays and
+   * that file system access is very slow.
+   * </p>
+   * 
+   * @return
+   */
+  public byte [] getAsByteArray();
 }
diff --git a/src/main/java/at/gv/egiz/pdfas/framework/output/DataSink.java b/src/main/java/at/gv/egiz/pdfas/framework/output/DataSink.java
index d7d0cc4..595df52 100644
--- a/src/main/java/at/gv/egiz/pdfas/framework/output/DataSink.java
+++ b/src/main/java/at/gv/egiz/pdfas/framework/output/DataSink.java
@@ -12,4 +12,8 @@ public interface DataSink
   public OutputStream createOutputStream(String mimeType);
 
   public OutputStream createOutputStream(String mimeType, String characterEncoding);
+
+  public String getMimeType();
+
+  public String getCharacterEncoding();
 }