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/*
* Author: Andrei Vasiliu <andrei.vasiliu@intel.com>
* Copyright (c) 2016 Intel Corporation.
*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef HELPER_BASE_HPP_
#define HELPER_BASE_HPP_
#include <vector>
#include <memory>
#include <functional>
#include <jni.h>
#include "BasicTypes.hpp"
jfieldID getInstanceField(JNIEnv *env, jobject obj);
jclass search_class(JNIEnv *env, const char *clazz_name);
jclass search_class(JNIEnv *env, jobject obj);
jmethodID search_method(JNIEnv *env, jclass clazz, const char *method_name,
const char *prototype, bool is_static);
jfieldID search_field(JNIEnv *env, jclass clazz, const char *field_name,
const char *type, bool is_static);
bool from_jboolean_to_bool(jboolean val);
std::string from_jstring_to_string(JNIEnv *env, jstring str);
jstring from_string_to_jstring(JNIEnv *env, const std::string & str);
jobject get_bluetooth_type(JNIEnv *env, const char *field_name);
jobject get_new_arraylist(JNIEnv *env, unsigned int size, jmethodID *add);
template <typename T>
T *castInstance(jlong instance)
{
T *t = reinterpret_cast<T *>(instance);
if (t == nullptr) {
throw std::runtime_error("Trying to cast null object");
}
return t;
}
template <typename T>
T *getInstance(JNIEnv *env, jobject obj)
{
jlong instance = env->GetLongField(obj, getInstanceField(env, obj));
T *t = reinterpret_cast<T *>(instance);
if (t == nullptr) {
throw std::runtime_error("Trying to acquire null object");
}
return t;
}
template <typename T>
void setInstance(JNIEnv *env, jobject obj, T *t)
{
if (t == nullptr) {
throw std::runtime_error("Trying to create null object");
}
jlong instance = reinterpret_cast<jlong>(t);
env->SetLongField(obj, getInstanceField(env, obj), instance);
}
template <typename T>
jobject generic_clone(JNIEnv *env, jobject obj)
{
T *obj_generic = getInstance<T>(env, obj);
T *copy_generic = obj_generic->clone();
jclass generic_class = search_class(env, *copy_generic);
jmethodID generic_ctor = search_method(env, generic_class, "<init>", "(J)V", false);
jobject result = env->NewObject(generic_class, generic_ctor, (jlong)copy_generic);
if (!result)
{
throw std::runtime_error("cannot create instance of class");
}
return result;
}
template <typename T>
jobject convert_vector_to_jobject(JNIEnv *env, std::vector<std::unique_ptr<T>>& array,
const char *ctor_prototype)
{
unsigned int array_size = array.size();
jmethodID arraylist_add;
jobject result = get_new_arraylist(env, array_size, &arraylist_add);
if (array_size == 0)
{
return result;
}
jclass clazz = search_class(env, T::java_class().c_str());
jmethodID clazz_ctor = search_method(env, clazz, "<init>", ctor_prototype, false);
for (unsigned int i = 0; i < array_size; ++i)
{
T *elem = array.at(i).release();
jobject object = env->NewObject(clazz, clazz_ctor, (jlong)elem);
if (!object)
{
throw direct_bt::InternalError("cannot create instance of class", E_FILE_LINE);
}
env->CallBooleanMethod(result, arraylist_add, object);
}
return result;
}
template <typename T>
jobject convert_vector_to_jobject(JNIEnv *env, std::vector<std::shared_ptr<T>>& array,
const char *ctor_prototype, std::function<jobject(JNIEnv*, jclass, jmethodID, T*)> ctor)
{
unsigned int array_size = array.size();
jmethodID arraylist_add;
jobject result = get_new_arraylist(env, array_size, &arraylist_add);
if (array_size == 0)
{
return result;
}
jclass clazz = search_class(env, T::java_class().c_str());
jmethodID clazz_ctor = search_method(env, clazz, "<init>", ctor_prototype, false);
for (unsigned int i = 0; i < array_size; ++i)
{
T *elem = array.at(i).get();
jobject object = ctor(env, clazz, clazz_ctor, elem);
if (!object)
{
throw std::runtime_error("cannot create instance of class\n");
}
env->CallBooleanMethod(result, arraylist_add, object);
}
return result;
}
void raise_java_exception(JNIEnv *env, std::exception &e);
void raise_java_runtime_exception(JNIEnv *env, std::runtime_error &e);
void raise_java_runtime_exception(JNIEnv *env, direct_bt::RuntimeException &e);
void raise_java_oom_exception(JNIEnv *env, std::bad_alloc &e);
void raise_java_invalid_arg_exception(JNIEnv *env, std::invalid_argument &e);
void raise_java_bluetooth_exception(JNIEnv *env, direct_bt::BluetoothException &e);
/**
* Re-throw current exception and raise respective java exception
* using any matching function above.
*/
void rethrow_and_raise_java_exception(JNIEnv *env);
/**
* Return true if a java exception occurred, otherwise false.
* <p>
* In case of an exception, the information might be logged to stderr.
* </p>
* <p>
* In case of an exception, user shall release resourced in their JNI code
* and leave immediately.
* </p>
*/
bool java_exception_check(JNIEnv *env, const char* file, int line);
/**
* Throws a C++ exception if a java exception occurred, otherwise do nothing.
* <p>
* In case of an exception, the information might be logged to stderr.
* </p>
* <p>
* In case of an exception and hence thrown C++ exception,
* might want to catch all and handle it via {@link #rethrow_and_raise_java_exception(JNIEnv*)}.
* </p>
*/
void java_exception_check_and_throw(JNIEnv *env, const char* file, int line);
#endif /* HELPER_BASE_HPP_ */
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