1 files changed, 28 insertions, 0 deletions
diff --git a/src/com/google/android/libraries/backup/shadow/BackupHelperSimulator.java b/src/com/google/android/libraries/backup/shadow/BackupHelperSimulator.java
new file mode 100644
index 0000000..01236f6
--- /dev/null
+++ b/src/com/google/android/libraries/backup/shadow/BackupHelperSimulator.java
@@ -0,0 +1,28 @@
+package com.google.android.libraries.backup.shadow;
+
+import android.app.backup.BackupHelper;
+import android.app.backup.FileBackupHelper;
+import android.content.Context;
+import com.google.common.base.Preconditions;
+
+/**
+ * Class which simulates backup & restore functionality of a {@link BackupHelper}.
+ */
+public abstract class BackupHelperSimulator {
+
+  /** Prefix key of the corresponding {@link FileBackupHelper}. */
+  protected final String keyPrefix;
+
+  public BackupHelperSimulator(String keyPrefix) {
+    this.keyPrefix = Preconditions.checkNotNull(keyPrefix);
+  }
+
+  /** Perform backup into an {@link Object}, which is then returned by the method. */
+  public abstract Object backup(Context context);
+
+  /**
+   * Perform restore from the provided {@link Object}, which must have the same type as the one
+   * returned by {@link #backup}.
+   */
+  public abstract void restore(Context context, Object data);
+}