1 files changed, 62 insertions, 0 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncrementalBackup.java b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncrementalBackup.java
new file mode 100644
index 0000000..e2e50b6
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/backup/incremental/serializer/SavedIncrementalBackup.java
@@ -0,0 +1,62 @@
+package com.keuin.kbackupfabric.backup.incremental.serializer;
+
+
+import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
+
+import java.io.Serializable;
+import java.time.ZonedDateTime;
+
+/**
+ * The abstraction of an object saved in the disk, containing all information (except binary data of files) about an incremental backup.
+ */
+public interface SavedIncrementalBackup extends Serializable {
+
+    /**
+     * Get an instance with the latest version.
+     */
+    static SavedIncrementalBackup newLatest(ObjectCollection2 objectCollection2, String backupName, ZonedDateTime backupTime, long totalSizeBytes, long increasedSizeBytes, int filesAdded, int totalFiles) {
+        return new SavedIncBackupV1(objectCollection2, backupName, backupTime, totalSizeBytes, increasedSizeBytes, filesAdded, totalFiles);
+    }
+
+    /**
+     * Get the object collection of the level directory.
+     *
+     * @return the object collection.
+     */
+    ObjectCollection2 getObjectCollection();
+
+    /**
+     * Get the custom backup name.
+     *
+     * @return the backup name.
+     */
+    String getBackupName();
+
+    /**
+     * Get the time when this backup was made.
+     *
+     * @return the time.
+     */
+    ZonedDateTime getBackupTime();
+
+    /**
+     * Get new files added to the base.
+     *
+     * @return file count.
+     */
+    int getFilesAdded();
+
+    /**
+     * Get the total size of the saved world.
+     *
+     * @return the size in bytes.
+     */
+    long getTotalSizeBytes();
+
+    /**
+     * Get the size we cost to add this backup into the base.
+     *
+     * @return the increased size in bytes.
+     */
+    long getIncreasedSizeBytes();
+}