From b1a7ffef3a0007b6991b8338460f6aac8cbb11e8 Mon Sep 17 00:00:00 2001
From: Joe Onorato <joeo@android.com>
Date: Wed, 6 May 2009 18:06:21 -0700
Subject: More backup tests
---
core/java/android/backup/FileBackupHelper.java | 68 ++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
create mode 100644 core/java/android/backup/FileBackupHelper.java
(limited to 'core/java/android/backup/FileBackupHelper.java')
diff --git a/core/java/android/backup/FileBackupHelper.java b/core/java/android/backup/FileBackupHelper.java
new file mode 100644
index 0000000..3b2122c
--- /dev/null
+++ b/core/java/android/backup/FileBackupHelper.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.backup;
+
+import android.content.Context;
+import android.os.ParcelFileDescriptor;
+
+import java.io.FileDescriptor;
+
+public class FileBackupHelper {
+ /**
+ * Based on oldSnapshot, determine which of the files from the application's data directory
+ * need to be backed up, write them to the data stream, and fill in newSnapshot with the
+ * state as it exists now.
+ */
+ public static void performBackup(Context context,
+ ParcelFileDescriptor oldSnapshot, ParcelFileDescriptor newSnapshot,
+ BackupDataOutput data, String[] files) {
+ String basePath = context.getFilesDir().getAbsolutePath();
+ performBackup_checked(basePath, oldSnapshot, newSnapshot, data, files);
+ }
+
+ /**
+ * Check the parameters so the native code doens't have to throw all the exceptions
+ * since it's easier to do that from java.
+ */
+ static void performBackup_checked(String basePath,
+ ParcelFileDescriptor oldSnapshot, ParcelFileDescriptor newSnapshot,
+ BackupDataOutput data, String[] files) {
+ if (newSnapshot == null) {
+ throw new NullPointerException("newSnapshot==null");
+ }
+ if (data == null) {
+ throw new NullPointerException("data==null");
+ }
+ if (data.fd == null) {
+ throw new NullPointerException("data.fd==null");
+ }
+ if (files == null) {
+ throw new NullPointerException("files==null");
+ }
+
+ int err = performBackup_native(basePath, oldSnapshot.getFileDescriptor(),
+ newSnapshot.getFileDescriptor(), data.fd, files);
+
+ if (err != 0) {
+ throw new RuntimeException("Backup failed"); // TODO: more here
+ }
+ }
+
+ native private static int performBackup_native(String basePath,
+ FileDescriptor oldSnapshot, FileDescriptor newSnapshot,
+ FileDescriptor data, String[] files);
+}
--
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