Add method that returns whether an image has been inserted.

diff --git a/src/main/java/net/pterodactylus/sone/data/Image.java b/src/main/java/net/pterodactylus/sone/data/Image.java
index 2afb098..f38a4fa 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/data/Image.java
+++ b/src/main/java/net/pterodactylus/sone/data/Image.java
@@ -131,6 +131,18 @@ public class Image implements Fingerprintable {
        }
 
        /**
+        * Returns whether the image has already been inserted. An image is
+        * considered as having been inserted it its {@link #getKey() key} is not
+        * {@code null}.
+        *
+        * @return {@code true} if there is a key for this image, {@code false}
+        *         otherwise
+        */
+       public boolean isInserted() {
+               return key != null;
+       }
+
+       /**
         * Returns the creation time of this image.
         *
         * @return The creation time of this image (in milliseconds since 1970, Jan