135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
/*
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* Copyright (C) 2006-2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#undef LOG_TAG
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#define LOG_TAG "Cursor"
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#include <jni.h>
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#include <JNIHelp.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <sqlite3.h>
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#include <utils/Log.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "sqlite3_exception.h"
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namespace android {
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static jfieldID gHandleField;
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static jfieldID gStatementField;
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#define GET_STATEMENT(env, object) \
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(sqlite3_stmt *)env->GetIntField(object, gStatementField)
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#define GET_HANDLE(env, object) \
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(sqlite3 *)env->GetIntField(object, gHandleField)
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sqlite3_stmt * compile(JNIEnv* env, jobject object,
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sqlite3 * handle, jstring sqlString)
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{
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int err;
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jchar const * sql;
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jsize sqlLen;
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sqlite3_stmt * statement = GET_STATEMENT(env, object);
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// Make sure not to leak the statement if it already exists
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if (statement != NULL) {
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sqlite3_finalize(statement);
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env->SetIntField(object, gStatementField, 0);
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}
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// Compile the SQL
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sql = env->GetStringChars(sqlString, NULL);
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sqlLen = env->GetStringLength(sqlString);
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err = sqlite3_prepare16_v2(handle, sql, sqlLen * 2, &statement, NULL);
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env->ReleaseStringChars(sqlString, sql);
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if (err == SQLITE_OK) {
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// Store the statement in the Java object for future calls
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LOGV("Prepared statement %p on %p", statement, handle);
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env->SetIntField(object, gStatementField, (int)statement);
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return statement;
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} else {
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// Error messages like 'near ")": syntax error' are not
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// always helpful enough, so construct an error string that
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// includes the query itself.
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const char *query = env->GetStringUTFChars(sqlString, NULL);
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char *message = (char*) malloc(strlen(query) + 50);
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if (message) {
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strcpy(message, ", while compiling: "); // less than 50 chars
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strcat(message, query);
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}
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env->ReleaseStringUTFChars(sqlString, query);
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throw_sqlite3_exception(env, handle, message);
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free(message);
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return NULL;
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}
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}
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static void native_compile(JNIEnv* env, jobject object, jstring sqlString)
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{
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compile(env, object, GET_HANDLE(env, object), sqlString);
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}
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static void native_finalize(JNIEnv* env, jobject object)
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{
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int err;
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sqlite3_stmt * statement = GET_STATEMENT(env, object);
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if (statement != NULL) {
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sqlite3_finalize(statement);
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env->SetIntField(object, gStatementField, 0);
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}
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}
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static JNINativeMethod sMethods[] =
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{
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/* name, signature, funcPtr */
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{"native_compile", "(Ljava/lang/String;)V", (void *)native_compile},
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{"native_finalize", "()V", (void *)native_finalize},
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};
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int register_android_database_SQLiteCompiledSql(JNIEnv * env)
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{
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jclass clazz;
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clazz = env->FindClass("android/database/sqlite/SQLiteCompiledSql");
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if (clazz == NULL) {
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LOGE("Can't find android/database/sqlite/SQLiteCompiledSql");
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return -1;
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}
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gHandleField = env->GetFieldID(clazz, "nHandle", "I");
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gStatementField = env->GetFieldID(clazz, "nStatement", "I");
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if (gHandleField == NULL || gStatementField == NULL) {
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LOGE("Error locating fields");
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return -1;
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}
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return AndroidRuntime::registerNativeMethods(env,
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"android/database/sqlite/SQLiteCompiledSql", sMethods, NELEM(sMethods));
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}
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} // namespace android
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