java jni: Split helper to helper_base + helper_tinyb (modularization)

C++ tinyb namespace is for the original D-Bus implementation,
hence providing the base helper explicitly.

Add static BluetoothFactory.getNativeAPIVersion().

1 files changed, 195 insertions, 0 deletions

diff --git a/java/jni/helper_base.cxx b/java/jni/helper_base.cxx
new file mode 100644
index 00000000..2c0c23e6
--- /dev/null
+++ b/java/jni/helper_base.cxx
@@ -0,0 +1,195 @@
+/*
+ * 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.
+ */
+
+#include <jni.h>
+#include <memory>
+#include <stdexcept>
+#include <vector>
+
+#include "helper_tinyb.hpp"
+
+jfieldID getInstanceField(JNIEnv *env, jobject obj)
+{
+    jclass clazz = env->GetObjectClass(obj);
+    // J == long
+    return env->GetFieldID(clazz, "nativeInstance", "J");
+}
+
+jclass search_class(JNIEnv *env, const char *clazz_name)
+{
+    jclass clazz = env->FindClass(clazz_name);
+    if (!clazz)
+    {
+        std::string error = "no class found: "; error += clazz_name;
+        throw std::runtime_error(error);
+    }
+    return clazz;
+}
+
+jclass search_class(JNIEnv *env, jobject obj)
+{
+    jclass clazz = env->GetObjectClass(obj);
+    if (!clazz)
+    {
+        std::string error = "no class found: ";
+        throw std::runtime_error(error);
+    }
+    return clazz;
+}
+
+jmethodID search_method(JNIEnv *env, jclass clazz, const char *method_name,
+                const char *prototype, bool is_static)
+{
+    jmethodID method;
+    if (is_static)
+    {
+        method = env->GetStaticMethodID(clazz, method_name, prototype);
+    }
+    else
+    {
+        method = env->GetMethodID(clazz, method_name, prototype);
+    }
+
+    if (!method)
+    {
+        throw std::runtime_error("no method found\n");
+    }
+
+    return method;
+}
+
+jfieldID search_field(JNIEnv *env, jclass clazz, const char *field_name,
+                const char *type, bool is_static)
+{
+    jfieldID field;
+    if (is_static)
+    {
+        field = env->GetStaticFieldID(clazz, field_name, type);
+    }
+    else
+    {
+        field = env->GetFieldID(clazz, field_name, type);
+    }
+
+    if (!field)
+    {
+        throw std::runtime_error("no method found\n");
+    }
+
+    return field;
+}
+
+bool from_jboolean_to_bool(jboolean val)
+{
+    bool result;
+
+    if (val == JNI_TRUE)
+    {
+        result = true;
+    }
+    else
+    {
+        if (val == JNI_FALSE)
+        {
+            result = false;
+        }
+        else
+        {
+            throw std::invalid_argument("the jboolean value is not true/false\n");
+        }
+    }
+
+    return result;
+}
+
+std::string from_jstring_to_string(JNIEnv *env, jstring str)
+{
+    jboolean is_copy = JNI_TRUE;
+    if (!str) {
+        throw std::invalid_argument("String should not be null");
+    }
+    const char *str_chars = (char *)env->GetStringUTFChars(str, &is_copy);
+    if (!str_chars) {
+        throw std::bad_alloc();
+    }
+    const std::string string_to_write = std::string(str_chars);
+
+    env->ReleaseStringUTFChars(str, str_chars);
+
+    return string_to_write;
+}
+
+jobject get_bluetooth_type(JNIEnv *env, const char *field_name)
+{
+    jclass b_type_enum = search_class(env, JAVA_MAIN_PACKAGE "/BluetoothType");
+
+    jfieldID b_type_field = search_field(env, b_type_enum, field_name, "L" JAVA_MAIN_PACKAGE "/BluetoothType;", true);
+
+    jobject result = env->GetStaticObjectField(b_type_enum, b_type_field);
+    env->DeleteLocalRef(b_type_enum);
+    return result;
+}
+
+jobject get_new_arraylist(JNIEnv *env, unsigned int size, jmethodID *add)
+{
+    jclass arraylist_class = search_class(env, "Ljava/util/ArrayList;");
+    jmethodID arraylist_ctor = search_method(env, arraylist_class, "<init>", "(I)V", false);
+
+    jobject result = env->NewObject(arraylist_class, arraylist_ctor, size);
+    if (!result)
+    {
+        throw std::runtime_error("cannot create instance of class\n");
+    }
+
+    *add = search_method(env, arraylist_class, "add", "(Ljava/lang/Object;)Z", false);
+
+    env->DeleteLocalRef(arraylist_class);
+    return result;
+}
+
+void raise_java_exception(JNIEnv *env, std::exception &e)
+{
+    env->ThrowNew(env->FindClass("java/lang/Error"), e.what());
+}
+
+void raise_java_runtime_exception(JNIEnv *env, std::runtime_error &e)
+{
+    env->ThrowNew(env->FindClass("java/lang/RuntimeException"), e.what());
+}
+
+void raise_java_oom_exception(JNIEnv *env, std::bad_alloc &e)
+{
+    env->ThrowNew(env->FindClass("java/lang/OutOfMemoryException"), e.what());
+}
+
+void raise_java_invalid_arg_exception(JNIEnv *env, std::invalid_argument &e)
+{
+    env->ThrowNew(env->FindClass("java/lang/IllegalArgumentException"), e.what());
+}
+
+