The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* //device/libs/android_runtime/android_database_SQLiteCursor.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #undef LOG_TAG |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 19 | #define LOG_TAG "SQLiteStatementCpp" |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 21 | #include "android_util_Binder.h" |
| 22 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | #include <jni.h> |
| 24 | #include <JNIHelp.h> |
| 25 | #include <android_runtime/AndroidRuntime.h> |
| 26 | |
| 27 | #include <sqlite3.h> |
| 28 | |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 29 | #include <cutils/ashmem.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 30 | #include <utils/Log.h> |
| 31 | |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 32 | #include <fcntl.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | #include <unistd.h> |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 36 | #include <sys/mman.h> |
| 37 | #include <sys/types.h> |
| 38 | #include <sys/stat.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 39 | |
| 40 | #include "sqlite3_exception.h" |
| 41 | |
| 42 | namespace android { |
| 43 | |
| 44 | |
| 45 | sqlite3_stmt * compile(JNIEnv* env, jobject object, |
| 46 | sqlite3 * handle, jstring sqlString); |
| 47 | |
| 48 | static jfieldID gHandleField; |
| 49 | static jfieldID gStatementField; |
| 50 | |
| 51 | |
| 52 | #define GET_STATEMENT(env, object) \ |
| 53 | (sqlite3_stmt *)env->GetIntField(object, gStatementField) |
| 54 | #define GET_HANDLE(env, object) \ |
| 55 | (sqlite3 *)env->GetIntField(object, gHandleField) |
| 56 | |
| 57 | |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 58 | static jint native_execute(JNIEnv* env, jobject object) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 59 | { |
| 60 | int err; |
| 61 | sqlite3 * handle = GET_HANDLE(env, object); |
| 62 | sqlite3_stmt * statement = GET_STATEMENT(env, object); |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 63 | int numChanges = -1; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 64 | |
| 65 | // Execute the statement |
| 66 | err = sqlite3_step(statement); |
| 67 | |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 68 | // Throw an exception if an error occurred |
Vasu Nori | d72ec5f | 2010-05-25 15:21:18 -0700 | [diff] [blame] | 69 | if (err == SQLITE_ROW) { |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 70 | throw_sqlite3_exception(env, |
| 71 | "Queries can be performed using SQLiteDatabase query or rawQuery methods only."); |
Vasu Nori | d72ec5f | 2010-05-25 15:21:18 -0700 | [diff] [blame] | 72 | } else if (err != SQLITE_DONE) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 73 | throw_sqlite3_exception_errcode(env, err, sqlite3_errmsg(handle)); |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 74 | } else { |
| 75 | numChanges = sqlite3_changes(handle); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 76 | } |
| 77 | |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 78 | // Reset the statement so it's ready to use again |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 79 | sqlite3_reset(statement); |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 80 | return numChanges; |
| 81 | } |
| 82 | |
| 83 | static jlong native_executeInsert(JNIEnv* env, jobject object) |
| 84 | { |
| 85 | sqlite3 * handle = GET_HANDLE(env, object); |
| 86 | jint numChanges = native_execute(env, object); |
| 87 | if (numChanges > 0) { |
| 88 | return sqlite3_last_insert_rowid(handle); |
| 89 | } else { |
| 90 | return -1; |
| 91 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | static jlong native_1x1_long(JNIEnv* env, jobject object) |
| 95 | { |
| 96 | int err; |
| 97 | sqlite3 * handle = GET_HANDLE(env, object); |
| 98 | sqlite3_stmt * statement = GET_STATEMENT(env, object); |
| 99 | jlong value = -1; |
| 100 | |
| 101 | // Execute the statement |
| 102 | err = sqlite3_step(statement); |
| 103 | |
| 104 | // Handle the result |
| 105 | if (err == SQLITE_ROW) { |
| 106 | // No errors, read the data and return it |
| 107 | value = sqlite3_column_int64(statement, 0); |
| 108 | } else { |
| 109 | throw_sqlite3_exception_errcode(env, err, sqlite3_errmsg(handle)); |
| 110 | } |
| 111 | |
| 112 | // Reset the statment so it's ready to use again |
| 113 | sqlite3_reset(statement); |
| 114 | |
| 115 | return value; |
| 116 | } |
| 117 | |
| 118 | static jstring native_1x1_string(JNIEnv* env, jobject object) |
| 119 | { |
| 120 | int err; |
| 121 | sqlite3 * handle = GET_HANDLE(env, object); |
| 122 | sqlite3_stmt * statement = GET_STATEMENT(env, object); |
| 123 | jstring value = NULL; |
| 124 | |
| 125 | // Execute the statement |
| 126 | err = sqlite3_step(statement); |
| 127 | |
| 128 | // Handle the result |
| 129 | if (err == SQLITE_ROW) { |
| 130 | // No errors, read the data and return it |
| 131 | char const * text = (char const *)sqlite3_column_text(statement, 0); |
| 132 | value = env->NewStringUTF(text); |
| 133 | } else { |
| 134 | throw_sqlite3_exception_errcode(env, err, sqlite3_errmsg(handle)); |
| 135 | } |
| 136 | |
| 137 | // Reset the statment so it's ready to use again |
| 138 | sqlite3_reset(statement); |
| 139 | |
| 140 | return value; |
| 141 | } |
| 142 | |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 143 | static jobject createParcelFileDescriptor(JNIEnv * env, int fd) |
| 144 | { |
| 145 | // Create FileDescriptor object |
| 146 | jobject fileDesc = newFileDescriptor(env, fd); |
| 147 | if (fileDesc == NULL) { |
| 148 | // FileDescriptor constructor has thrown an exception |
| 149 | close(fd); |
| 150 | return NULL; |
| 151 | } |
| 152 | |
| 153 | // Wrap it in a ParcelFileDescriptor |
| 154 | jobject parcelFileDesc = newParcelFileDescriptor(env, fileDesc); |
| 155 | if (parcelFileDesc == NULL) { |
| 156 | // ParcelFileDescriptor constructor has thrown an exception |
| 157 | close(fd); |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | return parcelFileDesc; |
| 162 | } |
| 163 | |
| 164 | // Creates an ashmem area, copies some data into it, and returns |
| 165 | // a ParcelFileDescriptor for the ashmem area. |
| 166 | static jobject create_ashmem_region_with_data(JNIEnv * env, |
| 167 | const void * data, int length) |
| 168 | { |
| 169 | // Create ashmem area |
| 170 | int fd = ashmem_create_region(NULL, length); |
| 171 | if (fd < 0) { |
| 172 | LOGE("ashmem_create_region failed: %s", strerror(errno)); |
| 173 | jniThrowIOException(env, errno); |
| 174 | return NULL; |
| 175 | } |
| 176 | |
| 177 | if (length > 0) { |
| 178 | // mmap the ashmem area |
| 179 | void * ashmem_ptr = |
| 180 | mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| 181 | if (ashmem_ptr == MAP_FAILED) { |
| 182 | LOGE("mmap failed: %s", strerror(errno)); |
| 183 | jniThrowIOException(env, errno); |
| 184 | close(fd); |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | // Copy data to ashmem area |
| 189 | memcpy(ashmem_ptr, data, length); |
| 190 | |
| 191 | // munmap ashmem area |
| 192 | if (munmap(ashmem_ptr, length) < 0) { |
| 193 | LOGE("munmap failed: %s", strerror(errno)); |
| 194 | jniThrowIOException(env, errno); |
| 195 | close(fd); |
| 196 | return NULL; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | // Make ashmem area read-only |
| 201 | if (ashmem_set_prot_region(fd, PROT_READ) < 0) { |
| 202 | LOGE("ashmem_set_prot_region failed: %s", strerror(errno)); |
| 203 | jniThrowIOException(env, errno); |
| 204 | close(fd); |
| 205 | return NULL; |
| 206 | } |
| 207 | |
| 208 | // Wrap it in a ParcelFileDescriptor |
| 209 | return createParcelFileDescriptor(env, fd); |
| 210 | } |
| 211 | |
| 212 | static jobject native_1x1_blob_ashmem(JNIEnv* env, jobject object) |
| 213 | { |
| 214 | int err; |
| 215 | sqlite3 * handle = GET_HANDLE(env, object); |
| 216 | sqlite3_stmt * statement = GET_STATEMENT(env, object); |
| 217 | jobject value = NULL; |
| 218 | |
| 219 | // Execute the statement |
| 220 | err = sqlite3_step(statement); |
| 221 | |
| 222 | // Handle the result |
| 223 | if (err == SQLITE_ROW) { |
| 224 | // No errors, read the data and return it |
| 225 | const void * blob = sqlite3_column_blob(statement, 0); |
| 226 | if (blob != NULL) { |
| 227 | int len = sqlite3_column_bytes(statement, 0); |
| 228 | if (len >= 0) { |
| 229 | value = create_ashmem_region_with_data(env, blob, len); |
| 230 | } |
| 231 | } |
| 232 | } else { |
| 233 | throw_sqlite3_exception_errcode(env, err, sqlite3_errmsg(handle)); |
| 234 | } |
| 235 | |
| 236 | // Reset the statment so it's ready to use again |
| 237 | sqlite3_reset(statement); |
| 238 | |
| 239 | return value; |
| 240 | } |
| 241 | |
Vasu Nori | 4e874ed | 2010-09-15 18:40:49 -0700 | [diff] [blame] | 242 | static void native_executeSql(JNIEnv* env, jobject object, jstring sql) |
| 243 | { |
| 244 | char const* sqlString = env->GetStringUTFChars(sql, NULL); |
| 245 | sqlite3 * handle = GET_HANDLE(env, object); |
| 246 | int err = sqlite3_exec(handle, sqlString, NULL, NULL, NULL); |
| 247 | if (err != SQLITE_OK) { |
| 248 | throw_sqlite3_exception(env, handle); |
| 249 | } |
| 250 | env->ReleaseStringUTFChars(sql, sqlString); |
| 251 | } |
| 252 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 253 | static JNINativeMethod sMethods[] = |
| 254 | { |
| 255 | /* name, signature, funcPtr */ |
Vasu Nori | fb16cbd | 2010-07-25 16:38:48 -0700 | [diff] [blame] | 256 | {"native_execute", "()I", (void *)native_execute}, |
| 257 | {"native_executeInsert", "()J", (void *)native_executeInsert}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 258 | {"native_1x1_long", "()J", (void *)native_1x1_long}, |
| 259 | {"native_1x1_string", "()Ljava/lang/String;", (void *)native_1x1_string}, |
Bjorn Bringert | a006b472 | 2010-04-14 14:43:26 +0100 | [diff] [blame] | 260 | {"native_1x1_blob_ashmem", "()Landroid/os/ParcelFileDescriptor;", (void *)native_1x1_blob_ashmem}, |
Vasu Nori | 4e874ed | 2010-09-15 18:40:49 -0700 | [diff] [blame] | 261 | {"native_executeSql", "(Ljava/lang/String;)V", (void *)native_executeSql}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 262 | }; |
| 263 | |
| 264 | int register_android_database_SQLiteStatement(JNIEnv * env) |
| 265 | { |
| 266 | jclass clazz; |
| 267 | |
| 268 | clazz = env->FindClass("android/database/sqlite/SQLiteStatement"); |
| 269 | if (clazz == NULL) { |
| 270 | LOGE("Can't find android/database/sqlite/SQLiteStatement"); |
| 271 | return -1; |
| 272 | } |
| 273 | |
| 274 | gHandleField = env->GetFieldID(clazz, "nHandle", "I"); |
| 275 | gStatementField = env->GetFieldID(clazz, "nStatement", "I"); |
| 276 | |
| 277 | if (gHandleField == NULL || gStatementField == NULL) { |
| 278 | LOGE("Error locating fields"); |
| 279 | return -1; |
| 280 | } |
| 281 | |
| 282 | return AndroidRuntime::registerNativeMethods(env, |
| 283 | "android/database/sqlite/SQLiteStatement", sMethods, NELEM(sMethods)); |
| 284 | } |
| 285 | |
| 286 | } // namespace android |