1 /*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "FileBackupHelper_native"
18 #include <utils/Log.h>
19
20 #include "JNIHelp.h"
21 #include "core_jni_helpers.h"
22
23 #include <androidfw/BackupHelpers.h>
24
25 namespace android
26 {
27
28 static jlong
ctor(JNIEnv * env,jobject clazz)29 ctor(JNIEnv* env, jobject clazz)
30 {
31 return (jlong)new RestoreHelperBase();
32 }
33
34 static void
dtor(JNIEnv * env,jobject clazz,jlong ptr)35 dtor(JNIEnv* env, jobject clazz, jlong ptr)
36 {
37 delete (RestoreHelperBase*)ptr;
38 }
39
40 static jint
performBackup_native(JNIEnv * env,jobject clazz,jobject oldState,jlong data,jobject newState,jobjectArray files,jobjectArray keys)41 performBackup_native(JNIEnv* env, jobject clazz, jobject oldState, jlong data,
42 jobject newState, jobjectArray files, jobjectArray keys)
43 {
44 int err;
45
46 // all parameters have already been checked against null
47 int oldStateFD = oldState != NULL ? jniGetFDFromFileDescriptor(env, oldState) : -1;
48 int newStateFD = jniGetFDFromFileDescriptor(env, newState);
49 BackupDataWriter* dataStream = (BackupDataWriter*)data;
50
51 const int fileCount = env->GetArrayLength(files);
52 char const** filesUTF = (char const**)malloc(sizeof(char*)*fileCount);
53 for (int i=0; i<fileCount; i++) {
54 filesUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(files, i), NULL);
55 }
56
57 const int keyCount = env->GetArrayLength(keys);
58 char const** keysUTF = (char const**)malloc(sizeof(char*)*keyCount);
59 for (int i=0; i<keyCount; i++) {
60 keysUTF[i] = env->GetStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), NULL);
61 }
62
63 err = back_up_files(oldStateFD, dataStream, newStateFD, filesUTF, keysUTF, fileCount);
64
65 for (int i=0; i<fileCount; i++) {
66 env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(files, i), filesUTF[i]);
67 }
68 free(filesUTF);
69
70 for (int i=0; i<keyCount; i++) {
71 env->ReleaseStringUTFChars((jstring)env->GetObjectArrayElement(keys, i), keysUTF[i]);
72 }
73 free(keysUTF);
74
75 return (jint) err;
76 }
77
78
79 static jint
writeFile_native(JNIEnv * env,jobject clazz,jlong ptr,jstring filenameObj,jlong backupReaderPtr)80 writeFile_native(JNIEnv* env, jobject clazz, jlong ptr, jstring filenameObj, jlong backupReaderPtr)
81 {
82 int err;
83 RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
84 BackupDataReader* reader = (BackupDataReader*)backupReaderPtr;
85 char const* filename;
86
87 filename = env->GetStringUTFChars(filenameObj, NULL);
88
89 err = restore->WriteFile(String8(filename), reader);
90
91 env->ReleaseStringUTFChars(filenameObj, filename);
92
93 return (jint) err;
94 }
95
96 static jint
writeSnapshot_native(JNIEnv * env,jobject clazz,jlong ptr,jobject fileDescriptor)97 writeSnapshot_native(JNIEnv* env, jobject clazz, jlong ptr, jobject fileDescriptor)
98 {
99 int err;
100
101 RestoreHelperBase* restore = (RestoreHelperBase*)ptr;
102 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
103
104 err = restore->WriteSnapshot(fd);
105
106 return (jint) err;
107 }
108
109 static const JNINativeMethod g_methods[] = {
110 { "ctor", "()J", (void*)ctor },
111 { "dtor", "(J)V", (void*)dtor },
112 { "performBackup_native",
113 "(Ljava/io/FileDescriptor;JLjava/io/FileDescriptor;[Ljava/lang/String;[Ljava/lang/String;)I",
114 (void*)performBackup_native },
115 { "writeFile_native", "(JLjava/lang/String;J)I", (void*)writeFile_native },
116 { "writeSnapshot_native", "(JLjava/io/FileDescriptor;)I", (void*)writeSnapshot_native },
117 };
118
register_android_backup_FileBackupHelperBase(JNIEnv * env)119 int register_android_backup_FileBackupHelperBase(JNIEnv* env)
120 {
121 return RegisterMethodsOrDie(env, "android/app/backup/FileBackupHelperBase",
122 g_methods, NELEM(g_methods));
123 }
124
125 }
126