Add backup side of new FullBackupAgent class

This class backs up an app's entire data directory tree.  Intended for use
by the backup-through-adb full mirroring facility, etc.  @hide because
it's not really something end apps will need to use.

1 files changed, 58 insertions, 0 deletions

diff --git a/core/java/android/app/FullBackupAgent.java b/core/java/android/app/FullBackupAgent.java
new file mode 100644
index 0000000..18d62e3
--- /dev/null
+++ b/core/java/android/app/FullBackupAgent.java
@@ -0,0 +1,58 @@
+package android.app;
+
+import android.backup.BackupDataOutput;
+import android.backup.FileBackupHelper;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.LinkedList;
+
+/**
+ * Backs up an application's entire /data/data/<package>/... file system.  This
+ * class is used by the desktop full backup mechanism and is not intended for direct
+ * use by applications.
+ * 
+ * {@hide}
+ */
+
+public class FullBackupAgent extends BackupAgent {
+    // !!! TODO: turn off debugging
+    private static final String TAG = "FullBackupAgent";
+    private static final boolean DEBUG = true;
+
+    @Override
+    public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
+            ParcelFileDescriptor newState) {
+        LinkedList<File> dirsToScan = new LinkedList<File>();
+        ArrayList<String> allFiles = new ArrayList<String>();
+
+        // build the list of files in the app's /data/data tree
+        dirsToScan.add(getFilesDir());
+        if (DEBUG) Log.v(TAG, "Backing up dir tree @ " + getFilesDir().getAbsolutePath() + " :");
+        while (dirsToScan.size() > 0) {
+            File dir = dirsToScan.removeFirst();
+            File[] contents = dir.listFiles();
+            if (contents != null) {
+                for (File f : contents) {
+                    if (f.isDirectory()) {
+                        dirsToScan.add(f);
+                    } else if (f.isFile()) {
+                        if (DEBUG) Log.v(TAG, "    " + f.getAbsolutePath());
+                        allFiles.add(f.getAbsolutePath());
+                    }
+                }
+            }
+        }
+
+        // That's the file set; now back it all up
+        FileBackupHelper.performBackup(this, oldState, data, newState,
+                (String[]) allFiles.toArray());
+    }
+
+    @Override
+    public void onRestore(ParcelFileDescriptor data, ParcelFileDescriptor newState) {
+    }
+
+}