From 1cf587496fcb1d652bab9fc6792fb106b6fefaa4 Mon Sep 17 00:00:00 2001
From: Joe Onorato <joeo@android.com>
Date: Fri, 12 Jun 2009 11:06:24 -0700
Subject: Add RestoreFileHelper, BackupDataInput, and add java wrappers for the
methods on BackupDataOutput.
---
core/java/android/backup/BackupDataInput.java | 103 ++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100644 core/java/android/backup/BackupDataInput.java
(limited to 'core/java/android/backup/BackupDataInput.java')
diff --git a/core/java/android/backup/BackupDataInput.java b/core/java/android/backup/BackupDataInput.java
new file mode 100644
index 0000000..609dd90
--- /dev/null
+++ b/core/java/android/backup/BackupDataInput.java
@@ -0,0 +1,103 @@
+/*
+ * 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 java.io.FileDescriptor;
+import java.io.IOException;
+
+/** @hide */
+public class BackupDataInput {
+ int mBackupReader;
+
+ private EntityHeader mHeader = new EntityHeader();
+ private boolean mHeaderReady;
+
+ private static class EntityHeader {
+ String key;
+ int dataSize;
+ }
+
+ public BackupDataInput(FileDescriptor fd) {
+ if (fd == null) throw new NullPointerException();
+ mBackupReader = ctor(fd);
+ if (mBackupReader == 0) {
+ throw new RuntimeException("Native initialization failed with fd=" + fd);
+ }
+ }
+
+ protected void finalize() throws Throwable {
+ try {
+ dtor(mBackupReader);
+ } finally {
+ super.finalize();
+ }
+ }
+
+ public boolean readNextHeader() throws IOException {
+ int result = readNextHeader_native(mBackupReader, mHeader);
+ if (result == 0) {
+ // read successfully
+ mHeaderReady = true;
+ return true;
+ } else if (result > 0) {
+ // done
+ mHeaderReady = false;
+ return false;
+ } else {
+ // error
+ mHeaderReady = false;
+ throw new IOException("result=0x" + Integer.toHexString(result));
+ }
+ }
+
+ public String getKey() {
+ if (mHeaderReady) {
+ return mHeader.key;
+ } else {
+ throw new IllegalStateException("mHeaderReady=false");
+ }
+ }
+
+ public int getDataSize() {
+ if (mHeaderReady) {
+ return mHeader.dataSize;
+ } else {
+ throw new IllegalStateException("mHeaderReady=false");
+ }
+ }
+
+ public int readEntityData(byte[] data, int size) throws IOException {
+ if (mHeaderReady) {
+ int result = readEntityData_native(mBackupReader, data, size);
+ if (result >= 0) {
+ return result;
+ } else {
+ throw new IOException("result=0x" + Integer.toHexString(result));
+ }
+ } else {
+ throw new IllegalStateException("mHeaderReady=false");
+ }
+ }
+
+ private native static int ctor(FileDescriptor fd);
+ private native static void dtor(int mBackupReader);
+
+ private native int readNextHeader_native(int mBackupReader, EntityHeader entity);
+ private native int readEntityData_native(int mBackupReader, byte[] data, int size);
+}
--
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