DBTManager.cxx

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/*
 * 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.
 */
 
#include "jau_direct_bt_DBTManager.h"
 
// #define VERBOSE_ON 1
#include <jau/debug.hpp>
 
#include "helper_base.hpp"
#include "helper_dbt.hpp"
 
#include "direct_bt/BTDevice.hpp"
#include "direct_bt/BTAdapter.hpp"
#include "direct_bt/BTManager.hpp"
 
using namespace direct_bt;
using namespace jau;
 
static const std::string _removeAdapterCBMethodName("removeAdapterCB");
static const std::string _removeAdapterCBMethodArgs("(II)V");
static const std::string _updatedAdapterCBMethodName("updatedAdapterCB");
static const std::string _updatedAdapterCBMethodArgs("(II)V");
 
struct BooleanMgmtCBContext {
    MgmtEvent::Opcode opc;
    JNIGlobalRef jmgmtRef;
    jmethodID  mid;
 
    BooleanMgmtCBContext(MgmtEvent::Opcode opc_, JNIGlobalRef jmgmtRef_, jmethodID mid_)
    : opc(opc_), jmgmtRef(jmgmtRef_), mid(mid_) { }
 
    bool operator==(const BooleanMgmtCBContext& rhs) const
    {
        if( &rhs == this ) {
            return true;
        }
        return rhs.opc == opc &&
               rhs.jmgmtRef == jmgmtRef;
    }
 
    bool operator!=(const BooleanMgmtCBContext& rhs) const
    { return !( *this == rhs ); }
 
};
typedef std::shared_ptr<BooleanMgmtCBContext> BooleanMgmtCBContextRef;
 
static void _addMgmtCBOnce(JNIEnv *env, BTManager & mgmt, JNIGlobalRef jmgmtRef, MgmtEvent::Opcode opc,
                           const std::string &jmethodName, const std::string &jmethodArgs)
{
    try {
        bool(*nativeCallback)(BooleanMgmtCBContextRef&, const MgmtEvent&) =
                [](BooleanMgmtCBContextRef& ctx_ref, const MgmtEvent& e)->bool {
            JNIEnv *env_ = *jni_env;
            const int dev_id = e.getDevID();
 
            if( MgmtEvent::Opcode::INDEX_REMOVED == ctx_ref->opc ) {
                env_->CallVoidMethod(*(ctx_ref->jmgmtRef), ctx_ref->mid, dev_id, ctx_ref->opc); // remove
            } else if( MgmtEvent::Opcode::INDEX_ADDED == ctx_ref->opc ) {
                env_->CallVoidMethod(*(ctx_ref->jmgmtRef), ctx_ref->mid, dev_id, ctx_ref->opc); // updated
            } else if( MgmtEvent::Opcode::NEW_SETTINGS == ctx_ref->opc ) {
                const MgmtEvtNewSettings &event = *static_cast<const MgmtEvtNewSettings *>(&e);
                if( isAdapterSettingBitSet(event.getSettings(), AdapterSetting::POWERED) ) {
                    // probably newly POWERED on
                    env_->CallVoidMethod(*(ctx_ref->jmgmtRef), ctx_ref->mid, dev_id, ctx_ref->opc); // updated
                }
            }
            return true;
        };
 
 
        jclass mgmtClazz = jau::search_class(env, jmgmtRef.getObject());
        jau::java_exception_check_and_throw(env, E_FILE_LINE);
        if( nullptr == mgmtClazz ) {
            throw jau::InternalError("BTManager not found", E_FILE_LINE);
        }
        jmethodID mid = jau::search_method(env, mgmtClazz, jmethodName.c_str(), jmethodArgs.c_str(), false);
        jau::java_exception_check_and_throw(env, E_FILE_LINE);
        if( nullptr == mid ) {
            throw jau::InternalError("BTManager has no "+jmethodName+"."+jmethodArgs+" method, for "+mgmt.toString(), E_FILE_LINE);
        }
 
        // move BooleanDeviceCBContextRef into CaptureInvocationFunc and operator== includes javaCallback comparison
        FunctionDef<bool, const MgmtEvent&> funcDef = bindCaptureFunc(std::make_shared<BooleanMgmtCBContext>(opc, jmgmtRef, mid), nativeCallback);
        mgmt.addMgmtEventCallback(-1, opc, funcDef);
    } catch(...) {
        rethrow_and_raise_java_exception(env);
    }
}
 
void Java_jau_direct_1bt_DBTManager_initImpl(JNIEnv *env, jobject obj, jboolean unifyUUID128Bit, jint jbtMode)
{
    directBTJNISettings.setUnifyUUID128Bit(unifyUUID128Bit);
    try {
        BTMode btMode = static_cast<BTMode>(jbtMode);
        BTManager *manager = &BTManager::get(btMode); // special: static singleton
        setInstance<BTManager>(env, obj, manager);
        java_exception_check_and_throw(env, E_FILE_LINE);
        manager->setJavaObject( std::shared_ptr<JavaAnon>( new JavaGlobalObj(obj, nullptr) ) );
        JavaGlobalObj::check(manager->getJavaObject(), E_FILE_LINE);
 
        JNIGlobalRef jmgmtRef = JavaGlobalObj::GetJavaObject(manager->getJavaObject());
        _addMgmtCBOnce(env, *manager, jmgmtRef, MgmtEvent::Opcode::INDEX_REMOVED, _removeAdapterCBMethodName, _removeAdapterCBMethodArgs);
        _addMgmtCBOnce(env, *manager, jmgmtRef, MgmtEvent::Opcode::INDEX_ADDED, _updatedAdapterCBMethodName, _updatedAdapterCBMethodArgs);
        _addMgmtCBOnce(env, *manager, jmgmtRef, MgmtEvent::Opcode::NEW_SETTINGS, _updatedAdapterCBMethodName, _updatedAdapterCBMethodArgs);
        DBG_PRINT("Java_jau_direct_1bt_DBTManager_init: Manager %s", manager->toString().c_str());
    } catch(...) {
        rethrow_and_raise_java_exception(env);
    }
}
 
void Java_jau_direct_1bt_DBTManager_deleteImpl(JNIEnv *env, jobject obj, jlong nativeInstance)
{
    (void)obj;
    try {
        BTManager *manager = castInstance<BTManager>(nativeInstance); // special: static singleton
        manager->close();
        manager->setJavaObject();
        (void) manager;
    } catch(...) {
        rethrow_and_raise_java_exception(env);
    }
}
 
static const std::string _adapterClazzCtorArgs("(J[BBLjava/lang/String;I)V");
static jobject _createJavaAdapter(JNIEnv *env_, jclass clazz, jmethodID clazz_ctor, BTAdapter* adapter) {
    // prepare adapter ctor
    const EUI48 addr = adapter->getAddressAndType().address;
    jbyteArray jaddr = env_->NewByteArray(sizeof(addr));
    env_->SetByteArrayRegion(jaddr, 0, sizeof(addr), (const jbyte*)(addr.b));
    jau::java_exception_check_and_throw(env_, E_FILE_LINE);
    const jstring name = from_string_to_jstring(env_, adapter->getName());
    java_exception_check_and_throw(env_, E_FILE_LINE);
    jobject jAdapter = env_->NewObject(clazz, clazz_ctor, (jlong)adapter, jaddr, adapter->getAddressAndType().type, name, adapter->dev_id);
    java_exception_check_and_throw(env_, E_FILE_LINE);
    JNIGlobalRef::check(jAdapter, E_FILE_LINE);
    std::shared_ptr<JavaAnon> jAdapterRef = adapter->getJavaObject(); // GlobalRef
    JavaGlobalObj::check(jAdapterRef, E_FILE_LINE);
    env_->DeleteLocalRef(jaddr);
    env_->DeleteLocalRef(name);
    env_->DeleteLocalRef(jAdapter);
 
    DBG_PRINT("Java_jau_direct_1bt_DBTManager_createJavaAdapter: New Adapter %p %s", adapter, adapter->toString().c_str());
    return JavaGlobalObj::GetObject(jAdapterRef);
};
 
jobject Java_jau_direct_1bt_DBTManager_getAdapterListImpl(JNIEnv *env, jobject obj)
{
    try {
        BTManager *manager = getInstance<BTManager>(env, obj);
        DBG_PRINT("Java_jau_direct_1bt_DBTManager_getAdapterListImpl: Manager %s", manager->toString().c_str());
 
        jau::darray<std::shared_ptr<BTAdapter>> adapters = manager->getAdapters();
        return convert_vector_sharedptr_to_jarraylist<jau::darray<std::shared_ptr<BTAdapter>>, BTAdapter>(
                env, adapters, _adapterClazzCtorArgs.c_str(), _createJavaAdapter);
    } catch(...) {
        rethrow_and_raise_java_exception(env);
    }
    return nullptr;
}
 
jobject Java_jau_direct_1bt_DBTManager_getAdapterImpl(JNIEnv *env, jobject obj, jint dev_id)
{
    try {
        BTManager *manager = getInstance<BTManager>(env, obj);
 
        std::shared_ptr<BTAdapter> adapter = manager->getAdapter(dev_id);
        if( nullptr == adapter ) {
            ERR_PRINT("BTManager::getAdapterImpl: Adapter dev_id %d: Not found", dev_id);
            return nullptr;
        }
        DBG_PRINT("BTManager::getAdapterImpl: Adapter dev_id %d: %s", dev_id, adapter->toString().c_str());
 
        return jau::convert_instance_to_jobject<BTAdapter>(env, adapter.get(),  _adapterClazzCtorArgs.c_str(), _createJavaAdapter);
    } catch(...) {
        rethrow_and_raise_java_exception(env);
    }
    return nullptr;
}