java_nativelistener.h

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/********************************************************************************************
* Twitch Broadcasting SDK
*
* This software is supplied under the terms of a license agreement with Twitch Interactive, Inc. and
* may not be copied or used except in accordance with the terms of that agreement
* Copyright (c) 2012-2016 Twitch Interactive, Inc.
*********************************************************************************************/

#pragma once

#include "twitchsdk/core/types/errortypes.h"
#include "twitchsdk/core/generated/java_all.h"
#include "twitchsdk/core/module.h"


namespace ttv
{
    namespace binding
    {
        namespace java
        {
            template <typename LISTENER_TYPE>
            class NativeListenerProxy;

            template <typename LISTENER_TYPE>
            class NativeModuleListener;
        }
    }
}


template <typename LISTENER_TYPE>
class ttv::binding::java::NativeListenerProxy : public LISTENER_TYPE
{
public:
    virtual ~NativeListenerProxy()
    {
    }

    void SetListener(jobject jListener)
    {
        AutoJEnv jEnv;

        if (mJavaListener.GetInstance() != nullptr)
        {
            if (jEnv->IsSameObject(mJavaListener.GetInstance(), jListener))
            {
                return;
            }
        }

        mJavaListener.Release();

        if (jListener != nullptr)
        {
            mJavaListener.Bind(jEnv, jListener);
        }

        return;
    }

    jobject GetListener() const
    {
        return mJavaListener.GetInstance();
    }

protected:
    GlobalJavaObjectReference mJavaListener;
    JavaClassInfo mListenerInfo;
};


template <typename LISTENER_TYPE>
class ttv::binding::java::NativeModuleListener : public NativeListenerProxy<LISTENER_TYPE>
{
public:
    NativeModuleListener(jobject jModule)
    {
        mJavaModule.Bind(gActiveJavaEnvironment, jModule);

        mModuleListenerInfo = GetJavaClassInfo_IModuleListener(gActiveJavaEnvironment);
    }

    virtual void ModuleStateChanged(ttv::IModule* /*source*/, ttv::IModule::State state, TTV_ErrorCode ec) override
    {
        jobject jListener = NativeListenerProxy<LISTENER_TYPE>::mJavaListener.GetInstance();
        if (jListener == nullptr)
        {
            return;
        }

        // Notify the java client
        AUTO_DELETE_LOCAL_REF(gActiveJavaEnvironment, jobject, jState, GetJavaInstance_SimpleEnum(gActiveJavaEnvironment, GetJavaClassInfo_ModuleState(gActiveJavaEnvironment), state));
        AUTO_DELETE_LOCAL_REF(gActiveJavaEnvironment, jobject, jResult, GetJavaInstance_ErrorCode(gActiveJavaEnvironment, ec));

        gActiveJavaEnvironment->CallVoidMethod(jListener, mModuleListenerInfo.methods["moduleStateChanged"], mJavaModule.GetInstance(), jState, jResult);
    }

protected:
    GlobalJavaObjectReference mJavaModule;
    JavaClassInfo mModuleListenerInfo;
};