Image: make it Serializable

diff --git a/src/be/nikiroo/utils/Image.java b/src/be/nikiroo/utils/Image.java
index 58b1f5aeac05f71370365ac9c3a562f70f722797..2e9c9f83a39bfd4fcdeef8d351071d8284e9af61 100644 (file)
--- a/src/be/nikiroo/utils/Image.java
+++ b/src/be/nikiroo/utils/Image.java
@@ -5,6 +5,8 @@ import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Serializable;
 
 import be.nikiroo.utils.streams.MarkableFileInputStream;
 
@@ -13,7 +15,9 @@ import be.nikiroo.utils.streams.MarkableFileInputStream;
  * 
  * @author niki
  */
-public class Image implements Closeable {
+public class Image implements Closeable, Serializable {
+       static private final long serialVersionUID = 1L;
+
        static private File tempRoot;
        static private TempFiles tmpRepository;
        static private long count = 0;
@@ -154,6 +158,44 @@ public class Image implements Closeable {
                }
        }
 
+       /**
+        * Write this {@link Image} for serialization purposes; that is, write the
+        * content of the backing temporary file.
+        * 
+        * @param out
+        *            the {@link OutputStream} to write to
+        * 
+        * @throws IOException
+        *             in case of I/O error
+        */
+       private void writeObject(java.io.ObjectOutputStream out) throws IOException {
+               InputStream in = newInputStream();
+               try {
+                       IOUtils.write(in, out);
+               } finally {
+                       in.close();
+               }
+       }
+
+       /**
+        * Read an {@link Image} written by
+        * {@link Image#writeObject(java.io.ObjectOutputStream)}; that is, create a
+        * new temporary file with the saved content.
+        * 
+        * @param in
+        *            the {@link InputStream} to read from
+        * @throws IOException
+        *             in case of I/O error
+        * @throws ClassNotFoundException
+        *             will not be thrown by this method
+        */
+       @SuppressWarnings("unused")
+       private void readObject(java.io.ObjectInputStream in) throws IOException,
+                       ClassNotFoundException {
+               data = getTemporaryFile();
+               IOUtils.write(in, data);
+       }
+
        /**
         * Change the temporary root directory used by the program.
         * <p>