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add JNI implementation of android.database.SQLiteConnection

Browse source 
This is based on the implementation from https://www.sqlite.org/android,
which is equal to the AOSP implementation besides not depending private
Android APIs.
The code has been rewritten from C++ to C.
This commit is contained in:
Julian Winkler 2023-08-27 11:00:09 +02:00
parent 253932f985
commit d81c6800b2
5 changed files with 934 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

2
README.md
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@ -3,7 +3,7 @@
---
dependencies on debian:
`sudo apt install libglib2.0-dev libgtk-4-dev libasound2-dev libopenxr-dev`
`sudo apt install libglib2.0-dev libgtk-4-dev libasound2-dev libopenxr-dev libportal-dev libsqlite3-dev`
build instructions:
1. compile and install https://gitlab.com/Mis012/dalvik_standalone (art branch) (you can run it from builddir, but it requires some additional env variables)

4
meson.build
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@ -64,6 +64,8 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
'src/api-impl-jni/android_view_Window.c',
'src/api-impl-jni/util.c',
'src/api-impl-jni/android_graphics_Canvas.c',
'src/api-impl-jni/database/android_database_SQLiteCommon.c',
'src/api-impl-jni/database/android_database_SQLiteConnection.c',
'src/api-impl-jni/drawables/ninepatch.c',
'src/api-impl-jni/android_content_res_AssetManager.c',
'src/api-impl-jni/audio/android_media_AudioTrack.c',
@ -93,7 +95,7 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
install: true,
install_dir : get_option('libdir') / 'java/dex/android_translation_layer/natives',
dependencies: [
dependency('gtk4'), dependency('gl'), dependency('egl'), dependency('wayland-client'), dependency('jni'), dependency('libportal')
dependency('gtk4'), dependency('gl'), dependency('egl'), dependency('wayland-client'), dependency('jni'), dependency('libportal'), dependency('sqlite3')
],
link_with: [ libandroid_so ],
link_args: [

141
src/api-impl-jni/database/android_database_SQLiteCommon.c Normal file
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@ -0,0 +1,141 @@
/*
* Copyright (C) 2007 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.
*/
/*
** Modified to support SQLite extensions by the SQLite developers:
** sqlite-dev@sqlite.org.
*/
/*
** Rewritten from C++ to C for Android Translation Layer:
*/
#include <stdio.h>
#include <stdlib.h>
#include "android_database_SQLiteCommon.h"
/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception_handle(JNIEnv* env, sqlite3* handle) {
throw_sqlite3_exception_handle_message(env, handle, NULL);
}
/* throw a SQLiteException with the given message */
void throw_sqlite3_exception_message(JNIEnv* env, const char* message) {
throw_sqlite3_exception_handle_message(env, NULL, message);
}
/* throw a SQLiteException with a message appropriate for the error in handle
concatenated with the given message
*/
void throw_sqlite3_exception_handle_message(JNIEnv* env, sqlite3* handle, const char* message) {
if (handle) {
// get the error code and message from the SQLite connection
// the error message may contain more information than the error code
// because it is based on the extended error code rather than the simplified
// error code that SQLite normally returns.
throw_sqlite3_exception_errcode_message(env, sqlite3_extended_errcode(handle),
sqlite3_errmsg(handle), message);
} else {
// we use SQLITE_OK so that a generic SQLiteException is thrown;
// any code not specified in the switch statement below would do.
throw_sqlite3_exception_errcode_message(env, SQLITE_OK, "unknown error", message);
}
}
/* throw a SQLiteException for a given error code
* should only be used when the database connection is not available because the
* error information will not be quite as rich */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message) {
throw_sqlite3_exception_errcode_message(env, errcode, "unknown error", message);
}
/* throw a SQLiteException for a given error code, sqlite3message, and
user message
*/
void throw_sqlite3_exception_errcode_message(JNIEnv* env, int errcode,
const char* sqlite3Message, const char* message) {
const char* exceptionClass;
switch (errcode & 0xff) { /* mask off extended error code */
case SQLITE_IOERR:
exceptionClass = "android/database/sqlite/SQLiteDiskIOException";
break;
case SQLITE_CORRUPT:
case SQLITE_NOTADB: // treat "unsupported file format" error as corruption also
exceptionClass = "android/database/sqlite/SQLiteDatabaseCorruptException";
break;
case SQLITE_CONSTRAINT:
exceptionClass = "android/database/sqlite/SQLiteConstraintException";
break;
case SQLITE_ABORT:
exceptionClass = "android/database/sqlite/SQLiteAbortException";
break;
case SQLITE_DONE:
exceptionClass = "android/database/sqlite/SQLiteDoneException";
sqlite3Message = NULL; // SQLite error message is irrelevant in this case
break;
case SQLITE_FULL:
exceptionClass = "android/database/sqlite/SQLiteFullException";
break;
case SQLITE_MISUSE:
exceptionClass = "android/database/sqlite/SQLiteMisuseException";
break;
case SQLITE_PERM:
exceptionClass = "android/database/sqlite/SQLiteAccessPermException";
break;
case SQLITE_BUSY:
exceptionClass = "android/database/sqlite/SQLiteDatabaseLockedException";
break;
case SQLITE_LOCKED:
exceptionClass = "android/database/sqlite/SQLiteTableLockedException";
break;
case SQLITE_READONLY:
exceptionClass = "android/database/sqlite/SQLiteReadOnlyDatabaseException";
break;
case SQLITE_CANTOPEN:
exceptionClass = "android/database/sqlite/SQLiteCantOpenDatabaseException";
break;
case SQLITE_TOOBIG:
exceptionClass = "android/database/sqlite/SQLiteBlobTooBigException";
break;
case SQLITE_RANGE:
exceptionClass = "android/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException";
break;
case SQLITE_NOMEM:
exceptionClass = "android/database/sqlite/SQLiteOutOfMemoryException";
break;
case SQLITE_MISMATCH:
exceptionClass = "android/database/sqlite/SQLiteDatatypeMismatchException";
break;
case SQLITE_INTERRUPT:
exceptionClass = "android/os/OperationCanceledException";
break;
default:
exceptionClass = "android/database/sqlite/SQLiteException";
break;
}
if (sqlite3Message) {
char *zFullmsg = sqlite3_mprintf(
"%s (code %d)%s%s", sqlite3Message, errcode,
(message ? ": " : ""), (message ? message : "")
);
printf("throwing new %s\n", exceptionClass);
(*env)->ThrowNew(env, (*env)->FindClass(env, exceptionClass), zFullmsg);
sqlite3_free(zFullmsg);
} else {
printf("throwing new %s\n", exceptionClass);
(*env)->ThrowNew(env, (*env)->FindClass(env, exceptionClass), message);
}
}

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src/api-impl-jni/database/android_database_SQLiteCommon.h Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (C) 2007 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.
*/
/*
** Modified to support SQLite extensions by the SQLite developers:
** sqlite-dev@sqlite.org.
*/
#ifndef _ANDROID_DATABASE_SQLITE_COMMON_H
#define _ANDROID_DATABASE_SQLITE_COMMON_H
#include <jni.h>
#include <sqlite3.h>
// Special log tags defined in SQLiteDebug.java.
#define SQLITE_LOG_TAG "SQLiteLog"
#define SQLITE_TRACE_TAG "SQLiteStatements"
#define SQLITE_PROFILE_TAG "SQLiteTime"
/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception_handle(JNIEnv* env, sqlite3* handle);
/* throw a SQLiteException with the given message */
void throw_sqlite3_exception_message(JNIEnv* env, const char* message);
/* throw a SQLiteException with a message appropriate for the error in handle
concatenated with the given message
*/
void throw_sqlite3_exception_handle_message(JNIEnv* env, sqlite3* handle, const char* message);
/* throw a SQLiteException for a given error code */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message);
void throw_sqlite3_exception_errcode_message(JNIEnv* env, int errcode,
const char* sqlite3Message, const char* message);
#endif // _ANDROID_DATABASE_SQLITE_COMMON_H

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src/api-impl-jni/database/android_database_SQLiteConnection.c Normal file
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@ -0,0 +1,739 @@
/*
* Copyright (C) 2011 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.
*/
/*
** Modified to support SQLite extensions by the SQLite developers:
** sqlite-dev@sqlite.org.
*/
/*
** Rewritten from C++ to C for Android Translation Layer:
*/
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <assert.h>
#include <sqlite3.h>
#include "android_database_SQLiteCommon.h"
#include "../generated_headers/android_database_sqlite_SQLiteConnection.h"
#include "../defines.h"
#include "../util.h"
enum {
// Open flags.
// Must be kept in sync with the constants defined in SQLiteDatabase.java.
OPEN_READWRITE = 0x00000000,
OPEN_READONLY = 0x00000001,
OPEN_READ_MASK = 0x00000001,
NO_LOCALIZED_COLLATORS = 0x00000010,
CREATE_IF_NECESSARY = 0x10000000,
};
struct SQLiteConnection {
sqlite3* db;
int openFlags;
char *path;
char *label;
volatile bool canceled;
};
/* Busy timeout in milliseconds.
* If another connection (possibly in another process) has the database locked for
* longer than this amount of time then SQLite will generate a SQLITE_BUSY error.
* The SQLITE_BUSY error is then raised as a SQLiteDatabaseLockedException.
*
* In ordinary usage, busy timeouts are quite rare. Most databases only ever
* have a single open connection at a time unless they are using WAL. When using
* WAL, a timeout could occur if one connection is busy performing an auto-checkpoint
* operation. The busy timeout needs to be long enough to tolerate slow I/O write
* operations but not so long as to cause the application to hang indefinitely if
* there is a problem acquiring a database lock.
*/
static const int BUSY_TIMEOUT_MS = 2500;
/*
** This function is a collation sequence callback equivalent to the built-in
** BINARY sequence.
**
** Stock Android uses a modified version of sqlite3.c that calls out to a module
** named "sqlite3_android" to add extra built-in collations and functions to
** all database handles. Specifically, collation sequence "LOCALIZED". For now,
** this module does not include sqlite3_android (since it is difficult to build
** with the NDK only). Instead, this function is registered as "LOCALIZED" for all
** new database handles.
*/
static int coll_localized(
void *not_used,
int nKey1, const void *pKey1,
int nKey2, const void *pKey2
){
int rc, n;
n = nKey1<nKey2 ? nKey1 : nKey2;
rc = memcmp(pKey1, pKey2, n);
if( rc==0 ){
rc = nKey1 - nKey2;
}
return rc;
}
// Called each time a statement begins execution, when tracing is enabled.
static void sqliteTraceCallback(void *data, const char *sql) {
// struct SQLiteConnection* connection = data;
// printf(SQLITE_TRACE_TAG " %s: \"%s\"\n",
// connection->label, sql);
}
// Called each time a statement finishes execution, when profiling is enabled.
static void sqliteProfileCallback(void *data, const char *sql, sqlite3_uint64 tm) {
// struct SQLiteConnection* connection = data;
// printf(SQLITE_PROFILE_TAG " %s: \"%s\" took %0.3f ms\n",
// connection->label, sql, tm * 0.000001f);
}
JNIEXPORT jlong JNICALL Java_android_database_sqlite_SQLiteConnection_nativeOpen(JNIEnv *env, jclass clazz, jstring pathStr, jint openFlags,
jstring labelStr, jboolean enableTrace, jboolean enableProfile) {
int sqliteFlags;
if (openFlags & CREATE_IF_NECESSARY) {
sqliteFlags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
} else if (openFlags & OPEN_READONLY) {
sqliteFlags = SQLITE_OPEN_READONLY;
} else {
sqliteFlags = SQLITE_OPEN_READWRITE;
}
const char* pathChars = (*env)->GetStringUTFChars(env, pathStr, NULL);
char *path = strdup(pathChars);
(*env)->ReleaseStringUTFChars(env, pathStr, pathChars);
const char* labelChars = (*env)->GetStringUTFChars(env, labelStr, NULL);
char *label = strdup(labelChars);
(*env)->ReleaseStringUTFChars(env, labelStr, labelChars);
sqlite3* db;
int err = sqlite3_open_v2(path, &db, sqliteFlags, NULL);
if (err != SQLITE_OK) {
throw_sqlite3_exception_errcode(env, err, "Could not open database");
return 0;
}
err = sqlite3_create_collation(db, "localized", SQLITE_UTF8, 0, coll_localized);
if (err != SQLITE_OK) {
throw_sqlite3_exception_errcode(env, err, "Could not register collation");
sqlite3_close(db);
return 0;
}
// Check that the database is really read/write when that is what we asked for.
if ((sqliteFlags & SQLITE_OPEN_READWRITE) && sqlite3_db_readonly(db, NULL)) {
throw_sqlite3_exception_handle_message(env, db, "Could not open the database in read/write mode.");
sqlite3_close(db);
return 0;
}
// Set the default busy handler to retry automatically before returning SQLITE_BUSY.
err = sqlite3_busy_timeout(db, BUSY_TIMEOUT_MS);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, db, "Could not set busy timeout");
sqlite3_close(db);
return 0;
}
// Create wrapper object.
struct SQLiteConnection* connection = malloc(sizeof(struct SQLiteConnection));
connection->db = db;
connection->openFlags = openFlags;
connection->path = path;
connection->label = label;
// Enable tracing and profiling if requested.
if (enableTrace) {
sqlite3_trace(db, &sqliteTraceCallback, connection);
}
if (enableProfile) {
sqlite3_profile(db, &sqliteProfileCallback, connection);
}
// printf("Opened connection %p with label '%s'\n", db, label);
return _INTPTR(connection);
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeClose(JNIEnv *env, jclass clazz, jlong connectionPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
if (connection) {
// printf("Closing connection %p", connection->db);
int err = sqlite3_close(connection->db);
if (err != SQLITE_OK) {
// This can happen if sub-objects aren't closed first. Make sure the caller knows.
fprintf(stderr, "sqlite3_close(%p) failed: %d\n", connection->db, err);
throw_sqlite3_exception_handle_message(env, connection->db, "Count not close db.");
return;
}
free(connection->path);
free(connection->label);
free(connection);
}
}
// Called each time a custom function is evaluated.
static void sqliteCustomFunctionCallback(sqlite3_context *context, int argc, sqlite3_value **argv) {
JNIEnv* env = get_jni_env();
// Get the callback function object.
// Create a new local reference to it in case the callback tries to do something
// dumb like unregister the function (thereby destroying the global ref) while it is running.
jobject functionObjGlobal = sqlite3_user_data(context);
jobject functionObj = (*env)->NewLocalRef(env, functionObjGlobal);
jobjectArray argsArray = (*env)->NewObjectArray(env, argc, (*env)->FindClass(env, "java/lang/String"), NULL);
if (argsArray) {
for (int i = 0; i < argc; i++) {
const jchar* arg = sqlite3_value_text16(argv[i]);
if (!arg) {
fprintf(stderr, "NULL argument in custom_function_callback. This should not happen.");
} else {
size_t argLen = sqlite3_value_bytes16(argv[i]) / sizeof(jchar);
jstring argStr = (*env)->NewString(env, arg, argLen);
if (!argStr) {
goto error; // out of memory error
}
(*env)->SetObjectArrayElement(env, argsArray, i, argStr);
(*env)->DeleteLocalRef(env, argStr);
}
}
jclass custom_function_class = (*env)->FindClass(env, "android/database/sqlite/SQLiteCustomFunction");
// TODO: Support functions that return values.
(*env)->CallVoidMethod(env, functionObj,
_METHOD(custom_function_class, "dispatchCallback", "([Ljava/lang/String;)V"), argsArray);
error:
(*env)->DeleteLocalRef(env, argsArray);
}
(*env)->DeleteLocalRef(env, functionObj);
if ((*env)->ExceptionCheck(env)) {
fprintf(stderr, "An exception was thrown by custom SQLite function.");
/* LOGE_EX(env); */
(*env)->ExceptionClear(env);
}
}
// Called when a custom function is destroyed.
static void sqliteCustomFunctionDestructor(void* data) {
jobject functionObjGlobal = data;
JNIEnv* env = get_jni_env();
(*env)->DeleteGlobalRef(env, functionObjGlobal);
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeRegisterCustomFunction(JNIEnv* env, jclass clazz, jlong connectionPtr, jobject functionObj) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
jclass custom_function_class = (*env)->FindClass(env, "android/database/sqlite/SQLiteCustomFunction");
jstring nameStr = (*env)->GetObjectField(env, functionObj, _FIELD_ID(custom_function_class, "name", "Ljava/lang/String;"));
jint numArgs = (*env)->GetIntField(env, functionObj, _FIELD_ID(custom_function_class, "numArgs", "I"));
jobject functionObjGlobal = (*env)->NewGlobalRef(env, functionObj);
const char* name = (*env)->GetStringUTFChars(env, nameStr, NULL);
int err = sqlite3_create_function_v2(connection->db, name, numArgs, SQLITE_UTF16, functionObjGlobal,
&sqliteCustomFunctionCallback, NULL, NULL, &sqliteCustomFunctionDestructor);
(*env)->ReleaseStringUTFChars(env, nameStr, name);
if (err != SQLITE_OK) {
fprintf(stderr, "sqlite3_create_function returned %d", err);
(*env)->DeleteGlobalRef(env, functionObjGlobal);
throw_sqlite3_exception_handle(env, connection->db);
return;
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeRegisterLocalizedCollators(JNIEnv* env, jclass clazz, jlong connectionPtr, jstring localeStr) {
/* Localized collators are not supported. */
}
JNIEXPORT jlong JNICALL Java_android_database_sqlite_SQLiteConnection_nativePrepareStatement(JNIEnv* env, jclass clazz, jlong connectionPtr, jstring sqlString) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
jsize sqlLength = (*env)->GetStringLength(env, sqlString);
const jchar* sql = (*env)->GetStringCritical(env, sqlString, NULL);
sqlite3_stmt* statement;
int err = sqlite3_prepare16_v2(connection->db,
sql, sqlLength * sizeof(jchar), &statement, NULL);
(*env)->ReleaseStringCritical(env, sqlString, sql);
if (err != SQLITE_OK) {
// Error messages like 'near ")": syntax error' are not
// always helpful enough, so construct an error string that
// includes the query itself.
const char *query = (*env)->GetStringUTFChars(env, sqlString, NULL);
char *message = (char*) malloc(strlen(query) + 50);
if (message) {
strcpy(message, ", while compiling: "); // less than 50 chars
strcat(message, query);
}
(*env)->ReleaseStringUTFChars(env, sqlString, query);
throw_sqlite3_exception_handle_message(env, connection->db, message);
free(message);
return 0;
}
// printf("Prepared statement %p on connection %p\n", statement, connection->db);
return _INTPTR(statement);
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeFinalizeStatement(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
// struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
// We ignore the result of sqlite3_finalize because it is really telling us about
// whether any errors occurred while executing the statement. The statement itself
// is always finalized regardless.
// printf("Finalized statement %p on connection %p\n", statement, connection->db);
sqlite3_finalize(statement);
}
JNIEXPORT jint JNICALL Java_android_database_sqlite_SQLiteConnection_nativeGetParameterCount(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
sqlite3_stmt* statement = _PTR(statementPtr);
return sqlite3_bind_parameter_count(statement);
}
JNIEXPORT jboolean JNICALL Java_android_database_sqlite_SQLiteConnection_nativeIsReadOnly(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
sqlite3_stmt* statement = _PTR(statementPtr);
return sqlite3_stmt_readonly(statement) != 0;
}
JNIEXPORT jint JNICALL Java_android_database_sqlite_SQLiteConnection_nativeGetColumnCount(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
sqlite3_stmt* statement = _PTR(statementPtr);
return sqlite3_column_count(statement);
}
JNIEXPORT jstring JNICALL Java_android_database_sqlite_SQLiteConnection_nativeGetColumnName(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index) {
sqlite3_stmt* statement = _PTR(statementPtr);
const jchar* name = (sqlite3_column_name16(statement, index));
if (name) {
size_t length = 0;
while (name[length]) {
length += 1;
}
return (*env)->NewString(env, name, length);
}
return NULL;
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeBindNull(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = sqlite3_bind_null(statement, index);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeBindLong(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index, jlong value) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = sqlite3_bind_int64(statement, index, value);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeBindDouble(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index, jdouble value) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = sqlite3_bind_double(statement, index, value);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeBindString(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index, jstring valueString) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
jsize valueLength = (*env)->GetStringLength(env, valueString);
const jchar* value = (*env)->GetStringCritical(env, valueString, NULL);
int err = sqlite3_bind_text16(statement, index, value, valueLength * sizeof(jchar),
SQLITE_TRANSIENT);
(*env)->ReleaseStringCritical(env, valueString, value);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeBindBlob(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr, jint index, jbyteArray valueArray) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
jsize valueLength = (*env)->GetArrayLength(env, valueArray);
jbyte* value = ((*env)->GetPrimitiveArrayCritical(env, valueArray, NULL));
int err = sqlite3_bind_blob(statement, index, value, valueLength, SQLITE_TRANSIENT);
(*env)->ReleasePrimitiveArrayCritical(env, valueArray, value, JNI_ABORT);
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeResetStatementAndClearBindings(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = sqlite3_reset(statement);
if (err == SQLITE_OK) {
err = sqlite3_clear_bindings(statement);
}
if (err != SQLITE_OK) {
throw_sqlite3_exception_handle_message(env, connection->db, NULL);
}
}
static int executeNonQuery(JNIEnv* env, struct SQLiteConnection* connection, sqlite3_stmt* statement) {
int err;
while( SQLITE_ROW==(err=sqlite3_step(statement)) );
if( err!=SQLITE_DONE ){
throw_sqlite3_exception_handle(env, connection->db);
}
return err;
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecute(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
executeNonQuery(env, connection, statement);
}
static int executeOneRowQuery(JNIEnv* env, struct SQLiteConnection* connection, sqlite3_stmt* statement) {
int err = sqlite3_step(statement);
if (err != SQLITE_ROW) {
throw_sqlite3_exception_handle(env, connection->db);
}
return err;
}
JNIEXPORT jlong JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecuteForLong(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = executeOneRowQuery(env, connection, statement);
if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
return sqlite3_column_int64(statement, 0);
}
return -1;
}
JNIEXPORT jstring JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecuteForString(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = executeOneRowQuery(env, connection, statement);
if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
const jchar* text = (sqlite3_column_text16(statement, 0));
if (text) {
size_t length = sqlite3_column_bytes16(statement, 0) / sizeof(jchar);
return (*env)->NewString(env, text, length);
}
}
return NULL;
}
JNIEXPORT jint JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecuteForChangedRowCount(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = executeNonQuery(env, connection, statement);
return err == SQLITE_DONE ? sqlite3_changes(connection->db) : -1;
}
JNIEXPORT jlong JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecuteForLastInsertedRowId(JNIEnv* env, jclass clazz, jlong connectionPtr, jlong statementPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
sqlite3_stmt* statement = _PTR(statementPtr);
int err = executeNonQuery(env, connection, statement);
return err == SQLITE_DONE && sqlite3_changes(connection->db) > 0
? sqlite3_last_insert_rowid(connection->db) : -1;
}
/*
** Note: The following symbols must be in the same order as the corresponding
** elements in the aMethod[] array in function nativeExecuteForCursorWindow().
*/
enum CWMethodNames {
CW_CLEAR = 0,
CW_SETNUMCOLUMNS = 1,
CW_ALLOCROW = 2,
CW_FREELASTROW = 3,
CW_PUTNULL = 4,
CW_PUTLONG = 5,
CW_PUTDOUBLE = 6,
CW_PUTSTRING = 7,
CW_PUTBLOB = 8
};
/*
** An instance of this structure represents a single CursorWindow java method.
*/
struct CWMethod {
jmethodID id; /* Method id */
const char *zName; /* Method name */
const char *zSig; /* Method JNI signature */
};
/*
** Append the contents of the row that SQL statement pStmt currently points to
** to the CursorWindow object passed as the second argument. The CursorWindow
** currently contains iRow rows. Return true on success or false if an error
** occurs.
*/
static jboolean copyRowToWindow(
JNIEnv *env,
jobject win,
int iRow,
sqlite3_stmt *pStmt,
struct CWMethod *aMethod
){
int nCol = sqlite3_column_count(pStmt);
int i;
jboolean bOk;
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_ALLOCROW].id);
for(i=0; bOk && i<nCol; i++){
switch( sqlite3_column_type(pStmt, i) ){
case SQLITE_NULL: {
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_PUTNULL].id, iRow, i);
break;
}
case SQLITE_INTEGER: {
jlong val = sqlite3_column_int64(pStmt, i);
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_PUTLONG].id, val, iRow, i);
break;
}
case SQLITE_FLOAT: {
jdouble val = sqlite3_column_double(pStmt, i);
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_PUTDOUBLE].id, val, iRow, i);
break;
}
case SQLITE_TEXT: {
jchar *pStr = (jchar*)sqlite3_column_text16(pStmt, i);
int nStr = sqlite3_column_bytes16(pStmt, i) / sizeof(jchar);
jstring val = (*env)->NewString(env, pStr, nStr);
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_PUTSTRING].id, val, iRow, i);
(*env)->DeleteLocalRef(env, val);
break;
}
default: {
assert( sqlite3_column_type(pStmt, i)==SQLITE_BLOB );
const jbyte *p = (const jbyte*)sqlite3_column_blob(pStmt, i);
int n = sqlite3_column_bytes(pStmt, i);
jbyteArray val = (*env)->NewByteArray(env, n);
(*env)->SetByteArrayRegion(env, val, 0, n, p);
bOk = (*env)->CallBooleanMethod(env, win, aMethod[CW_PUTBLOB].id, val, iRow, i);
(*env)->DeleteLocalRef(env, val);
break;
}
}
if( bOk==0 ){
(*env)->CallVoidMethod(env, win, aMethod[CW_FREELASTROW].id);
}
}
return bOk;
}
static jboolean setWindowNumColumns(
JNIEnv *env,
jobject win,
sqlite3_stmt *pStmt,
struct CWMethod *aMethod
){
int nCol;
(*env)->CallVoidMethod(env, win, aMethod[CW_CLEAR].id);
nCol = sqlite3_column_count(pStmt);
return (*env)->CallBooleanMethod(env, win, aMethod[CW_SETNUMCOLUMNS].id, (jint)nCol);
}
/*
** This method has been rewritten for org.sqlite.database.*. The original
** android implementation used the C++ interface to populate a CursorWindow
** object. Since the NDK does not export this interface, we invoke the Java
** interface using standard JNI methods to do the same thing.
**
** This function executes the SQLite statement object passed as the 4th
** argument and copies one or more returned rows into the CursorWindow
** object passed as the 5th argument. The set of rows copied into the
** CursorWindow is always contiguous.
**
** The only row that *must* be copied into the CursorWindow is row
** iRowRequired. Ideally, all rows from iRowStart through to the end
** of the query are copied into the CursorWindow. If this is not possible
** (CursorWindow objects have a finite capacity), some compromise position
** is found (see comments embedded in the code below for details).
**
** The return value is a 64-bit integer calculated as follows:
**
** (iStart << 32) | nRow
**
** where iStart is the index of the first row copied into the CursorWindow.
** If the countAllRows argument is true, nRow is the total number of rows
** returned by the query. Otherwise, nRow is one greater than the index of
** the last row copied into the CursorWindow.
*/
JNIEXPORT jlong JNICALL Java_android_database_sqlite_SQLiteConnection_nativeExecuteForCursorWindow(
JNIEnv *env,
jclass clazz,
jlong connectionPtr, /* Pointer to SQLiteConnection C++ object */
jlong statementPtr, /* Pointer to sqlite3_stmt object */
jobject win, /* The CursorWindow object to populate */
jint startPos, /* First row to add (advisory) */
jint iRowRequired, /* Required row */
jboolean countAllRows
) {
sqlite3_stmt *pStmt = _PTR(statementPtr);
struct CWMethod aMethod[] = {
{0, "clear", "()V"},
{0, "setNumColumns", "(I)Z"},
{0, "allocRow", "()Z"},
{0, "freeLastRow", "()V"},
{0, "putNull", "(II)Z"},
{0, "putLong", "(JII)Z"},
{0, "putDouble", "(DII)Z"},
{0, "putString", "(Ljava/lang/String;II)Z"},
{0, "putBlob", "([BII)Z"},
};
jclass cls; /* Class android.database.CursorWindow */
int i; /* Iterator variable */
int nRow;
jboolean bOk;
int iStart; /* First row copied to CursorWindow */
/* Locate all required CursorWindow methods. */
cls = (*env)->FindClass(env, "android/database/CursorWindow");
for(i=0; i<(sizeof(aMethod)/sizeof(struct CWMethod)); i++){
aMethod[i].id = (*env)->GetMethodID(env, cls, aMethod[i].zName, aMethod[i].zSig);
if( aMethod[i].id==NULL ){
char msgBuf[512];
snprintf(msgBuf, sizeof(msgBuf), "Failed to find method CursorWindow.%s()", aMethod[i].zName);
(*env)->ThrowNew(env, (*env)->FindClass(env, "java/lang/Exception"), msgBuf);
return 0;
}
}
/* Set the number of columns in the window */
bOk = setWindowNumColumns(env, win, pStmt, aMethod);
if( bOk==0 ) return 0;
nRow = 0;
iStart = startPos;
while( sqlite3_step(pStmt)==SQLITE_ROW ){
/* Only copy in rows that occur at or after row index iStart. */
if( nRow>=iStart && bOk ){
bOk = copyRowToWindow(env, win, (nRow - iStart), pStmt, aMethod);
if( bOk==0 ){
/* The CursorWindow object ran out of memory. If row iRowRequired was
** not successfully added before this happened, clear the CursorWindow
** and try to add the current row again. */
if( nRow<=iRowRequired ){
bOk = setWindowNumColumns(env, win, pStmt, aMethod);
if( bOk==0 ){
sqlite3_reset(pStmt);
return 0;
}
iStart = nRow;
bOk = copyRowToWindow(env, win, (nRow - iStart), pStmt, aMethod);
}
/* If the CursorWindow is still full and the countAllRows flag is not
** set, break out of the loop here. If countAllRows is set, continue
** so as to set variable nRow correctly. */
if( bOk==0 && countAllRows==0 ) break;
}
}
nRow++;
}
/* Finalize the statement. If this indicates an error occurred, throw an
** SQLiteException exception. */
int rc = sqlite3_reset(pStmt);
if( rc!=SQLITE_OK ){
throw_sqlite3_exception_handle(env, sqlite3_db_handle(pStmt));
return 0;
}
jlong lRet = ((jlong)iStart) << 32 | ((jlong)nRow);
return lRet;
}
JNIEXPORT jint JNICALL Java_android_database_sqlite_SQLiteConnection_nativeGetDbLookaside(JNIEnv* env, jobject clazz, jlong connectionPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
int cur = -1;
int unused;
sqlite3_db_status(connection->db, SQLITE_DBSTATUS_LOOKASIDE_USED, &cur, &unused, 0);
return cur;
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeCancel(JNIEnv* env, jobject clazz, jlong connectionPtr) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
connection->canceled = true;
}
// Called after each SQLite VM instruction when cancelation is enabled.
static int sqliteProgressHandlerCallback(void* data) {
struct SQLiteConnection* connection = (data);
return connection->canceled;
}
JNIEXPORT void JNICALL Java_android_database_sqlite_SQLiteConnection_nativeResetCancel(JNIEnv* env, jobject clazz, jlong connectionPtr, jboolean cancelable) {
struct SQLiteConnection* connection = _PTR(connectionPtr);
connection->canceled = false;
if (cancelable) {
sqlite3_progress_handler(connection->db, 4, sqliteProgressHandlerCallback,
connection);
} else {
sqlite3_progress_handler(connection->db, 0, NULL, NULL);
}
}
JNIEXPORT jboolean JNICALL Java_android_database_sqlite_SQLiteConnection_nativeHasCodec(JNIEnv* env, jobject clazz){
#ifdef SQLITE_HAS_CODEC
return true;
#else
return false;
#endif
}