1 files changed, 117 insertions, 0 deletions
diff --git a/java/jni/helper_base.hpp b/java/jni/helper_base.hpp
new file mode 100644
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--- /dev/null
+++ b/java/jni/helper_base.hpp
@@ -0,0 +1,117 @@
+/*
+ * Author: Andrei Vasiliu <[email protected]>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * Author: Sven Gothel <[email protected]>
+ * 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.
+ */
+
+#pragma once
+
+#include <vector>
+#include <memory>
+
+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);
+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 *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\n");
+    }
+
+    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 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_oom_exception(JNIEnv *env, std::bad_alloc &e);
+void raise_java_invalid_arg_exception(JNIEnv *env, std::invalid_argument &e);