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#include "jni_helper.hpp"
#include "logging.hpp"
#include "base/assert.hpp"
#include "std/vector.hpp"
static JavaVM * g_jvm = 0;
extern JavaVM * GetJVM()
{
return g_jvm;
}
// TODO refactor cached jclass to smth more
// TODO finish this logic after refactoring
// cached classloader that can be used to find classes & methods from native threads.
//static shared_ptr<jobject> g_classLoader;
//static jmethodID g_findClassMethod;
// caching is necessary to create class from native threads
jclass g_indexClazz;
// @TODO remove after refactoring. Needed for NVidia code
void InitNVEvent(JavaVM * jvm);
extern "C"
{
JNIEXPORT jint JNICALL
JNI_OnLoad(JavaVM * jvm, void *)
{
g_jvm = jvm;
jni::InitSystemLog();
jni::InitAssertLog();
// @TODO remove line below after refactoring
InitNVEvent(jvm);
JNIEnv * env = jni::GetEnv();
// TODO
// init classloader & findclass methodID.
// auto randomClass = env->FindClass("com/mapswithme/maps/MapStorage");
// jclass classClass = env->GetObjectClass(randomClass);
// auto classLoaderClass = env->FindClass("java/lang/ClassLoader");
// auto getClassLoaderMethod = env->GetMethodID(classClass, "getClassLoader",
// "()Ljava/lang/ClassLoader;");
// g_classLoader = jni::make_global_ref(env->CallObjectMethod(randomClass, getClassLoaderMethod));
// ASSERT(*g_classLoader, ("Classloader can't be 0"));
// g_findClassMethod = env->GetMethodID(classLoaderClass, "findClass",
// "(Ljava/lang/String;)Ljava/lang/Class;");
// ASSERT(g_findClassMethod, ("FindClass methodId can't be 0"));
g_indexClazz = static_cast<jclass>(env->NewGlobalRef(env->FindClass("com/mapswithme/maps/MapStorage$Index")));
ASSERT(g_indexClazz, ("Index class not found!"));
return JNI_VERSION_1_6;
}
JNIEXPORT void JNICALL
JNI_OnUnload(JavaVM *, void *)
{
g_jvm = 0;
jni::GetEnv()->DeleteGlobalRef(g_indexClazz);
}
} // extern "C"
namespace jni
{
//
// jclass FindClass(char const * name)
// {
// JNIEnv * env = GetEnv();
// jstring className = env->NewStringUTF(name);
// jclass clazz = static_cast<jclass>(GetEnv()->CallObjectMethod(*g_classLoader, g_findClassMethod, className));
// env->DeleteLocalRef(className);
// return clazz;
// }
jmethodID GetJavaMethodID(JNIEnv * env, jobject obj, char const * fn, char const * sig)
{
ASSERT(env, ("JNIEnv can't be 0"));
ASSERT(obj, ("jobject can't be 0"));
jclass cls = env->GetObjectClass(obj);
ASSERT(cls, ("Can't get class: ", DescribeException()));
jmethodID mid = env->GetMethodID(cls, fn, sig);
ASSERT(mid, ("Can't get methodID", fn, sig, DescribeException()));
env->DeleteLocalRef(cls);
return mid;
}
jclass GetGlobalClassRef(JNIEnv * env, char const * sig)
{
jclass klass = env->FindClass(sig);
ASSERT(klass, ("Can't get class : ", DescribeException()));
return static_cast<jclass>(env->NewGlobalRef(klass));
}
string ToNativeString(JNIEnv * env, jstring str)
{
string result;
char const * utfBuffer = env->GetStringUTFChars(str, 0);
if (utfBuffer)
{
result = utfBuffer;
env->ReleaseStringUTFChars(str, utfBuffer);
}
return result;
}
string ToNativeString(JNIEnv * env, jbyteArray const & bytes)
{
int const len = env->GetArrayLength(bytes);
vector<char> buffer(len);
env->GetByteArrayRegion(bytes, 0, len, reinterpret_cast<jbyte *>(buffer.data()));
return string(buffer.data(), len);
}
jstring ToJavaString(JNIEnv * env, char const * s)
{
return env->NewStringUTF(s);
}
jclass GetStringClass(JNIEnv * env)
{
return env->FindClass(GetStringClassName());
}
char const * GetStringClassName()
{
return "java/lang/String";
}
JNIEnv * GetEnv()
{
JNIEnv * env;
if (JNI_OK != g_jvm->GetEnv((void **)&env, JNI_VERSION_1_6))
{
ASSERT(false, ("Can't get JNIEnv. Was thread attached to JVM?"));
return 0;
}
return env;
}
JavaVM * GetJVM()
{
ASSERT(g_jvm, ("JVM is not initialized"));
return g_jvm;
}
struct global_ref_deleter
{
void operator()(jobject * ref)
{
jni::GetEnv()->DeleteGlobalRef(*ref);
delete ref;
}
};
shared_ptr<jobject> make_global_ref(jobject obj)
{
jobject * ref = new jobject;
*ref = jni::GetEnv()->NewGlobalRef(obj);
return shared_ptr<jobject>(ref, global_ref_deleter());
}
string DescribeException()
{
JNIEnv * env = jni::GetEnv();
if (env->ExceptionCheck())
{
jthrowable e = env->ExceptionOccurred();
// have to clear the exception before JNI will work again.
env->ExceptionClear();
jclass eclass = env->GetObjectClass(e);
jmethodID mid = env->GetMethodID(eclass, "toString", "()Ljava/lang/String;");
jstring jErrorMsg = (jstring) env->CallObjectMethod(e, mid);
return ToNativeString(env, jErrorMsg);
}
return "";
}
jobject GetNewParcelablePointD(JNIEnv * env, m2::PointD const & point)
{
jclass klass = env->FindClass("com/mapswithme/maps/bookmarks/data/ParcelablePointD");
ASSERT ( klass, () );
jmethodID methodID = env->GetMethodID(
klass, "<init>",
"(DD)V");
ASSERT ( methodID, () );
return env->NewObject(klass, methodID,
static_cast<jdouble>(point.x),
static_cast<jdouble>(point.y));
}
jobject GetNewPoint(JNIEnv * env, m2::PointD const & point)
{
return GetNewPoint(env, m2::PointI(static_cast<int>(point.x), static_cast<int>(point.y)));
}
jobject GetNewPoint(JNIEnv * env, m2::PointI const & point)
{
jclass klass = env->FindClass("android/graphics/Point");
ASSERT ( klass, () );
jmethodID methodID = env->GetMethodID(
klass, "<init>",
"(II)V");
ASSERT ( methodID, () );
return env->NewObject(klass, methodID,
static_cast<jint>(point.x),
static_cast<jint>(point.y));
}
// TODO
// make ScopedLocalRef wrapper similar to https://android.googlesource.com/platform/libnativehelper/+/jb-mr1.1-dev-plus-aosp/include/nativehelper/ScopedLocalRef.h
// for localrefs automatically removed after going out of scope
// This util method dumps content of local and global reference jni tables to logcat for debug and testing purposes
void DumpDalvikReferenceTables()
{
JNIEnv * env = jni::GetEnv();
jclass vm_class = env->FindClass("dalvik/system/VMDebug");
jmethodID dump_mid = env->GetStaticMethodID(vm_class, "dumpReferenceTables", "()V");
env->CallStaticVoidMethod(vm_class, dump_mid);
env->DeleteLocalRef(vm_class);
}
} // namespace jni
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