src/controller/java/templates/CHIPReadCallbacks-src.zapt

{{> header}}
#include <jni/CHIPReadCallbacks.h>

#include <controller/java/zap-generated/CHIPClientCallbacks.h>

#include <jni.h>
#include <lib/support/JniReferences.h>
#include <lib/support/JniTypeWrappers.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/SafeInt.h>
#include <platform/PlatformManager.h>

{{#chip_server_global_responses}}
{{! TODO: Add support for struct-typed attributes }}
{{#unless (isStrEqual chipCallback.name "Unsupported")}}

CHIP{{chipCallback.name}}AttributeCallback::CHIP{{chipCallback.name}}AttributeCallback(jobject javaCallback, bool keepAlive) :
    chip::Callback::Callback<{{chipCallback.name}}AttributeCallback>(CallbackFn, this), keepAlive(keepAlive)
{
    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    if (env == nullptr) {
        ChipLogError(Zcl, "Could not create global reference for Java callback");
        return;
    }
    javaCallbackRef = env->NewGlobalRef(javaCallback);
    if (javaCallbackRef == nullptr) {
        ChipLogError(Zcl, "Could not create global reference for Java callback");
    }
}

CHIP{{chipCallback.name}}AttributeCallback::~CHIP{{chipCallback.name}}AttributeCallback() {
    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    if (env == nullptr)
    {
        ChipLogError(Zcl, "Could not delete global reference for Java callback");
        return;
    }
    env->DeleteGlobalRef(javaCallbackRef);
}

void CHIP{{chipCallback.name}}AttributeCallback::CallbackFn(void * context, {{chipCallback.type}} value)
{
    chip::DeviceLayer::StackUnlock unlock;
    CHIP_ERROR err = CHIP_NO_ERROR;

    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    VerifyOrReturn(env != nullptr, ChipLogError(Zcl, "Could not get JNI env"));

    std::unique_ptr<CHIP{{chipCallback.name}}AttributeCallback, decltype(&maybeDestroy)> cppCallback(reinterpret_cast<CHIP{{chipCallback.name}}AttributeCallback *>(context), maybeDestroy);

    // It's valid for javaCallbackRef to be nullptr if the Java code passed in a null callback.
    jobject javaCallbackRef = cppCallback.get()->javaCallbackRef;
    VerifyOrReturn(javaCallbackRef != nullptr, ChipLogDetail(Zcl, "Early return from attribute callback since Java callback is null"));

    jmethodID javaMethod;
    {{#unless (isStrEqual chipCallback.name "OctetString")}}
    {{#unless (isStrEqual chipCallback.name "CharString")}}
    err = chip::JniReferences::GetInstance().FindMethod(env, javaCallbackRef, "onSuccess", "({{convertCTypeToJniSignature chipCallback.type false}})V", &javaMethod);
    VerifyOrReturn(err == CHIP_NO_ERROR, ChipLogError(Zcl, "Could not find onSuccess method"));
    env->CallVoidMethod(javaCallbackRef, javaMethod, static_cast<{{convertBasicCTypeToJniType chipCallback.type}}>(value));
    {{/unless}}
    {{/unless}}

    {{#if (isStrEqual chipCallback.name "OctetString")}}
    err = chip::JniReferences::GetInstance().FindMethod(env, javaCallbackRef, "onSuccess", "([B)V", &javaMethod);
    VerifyOrReturn(err == CHIP_NO_ERROR, ChipLogError(Zcl, "Could not find onSuccess method"));

    VerifyOrReturn(chip::CanCastTo<uint32_t>(value.size()), ChipLogError(Zcl, "Value too long"));
    jbyteArray valueArr = env->NewByteArray(static_cast<uint32_t>(value.size()));
    env->ExceptionClear();
    env->SetByteArrayRegion(valueArr, 0, static_cast<uint32_t>(value.size()), reinterpret_cast<const jbyte *>(value.data()));

    env->CallVoidMethod(javaCallbackRef, javaMethod, valueArr);
    {{/if}}

    {{#if (isStrEqual chipCallback.name "CharString")}}
    err = chip::JniReferences::GetInstance().FindMethod(env, javaCallbackRef, "onSuccess", "(Ljava/lang/String;)V", &javaMethod);
    VerifyOrReturn(err == CHIP_NO_ERROR, ChipLogError(Zcl, "Could not find onSuccess method"));

    chip::UtfString valueStr(env, value);
    env->CallVoidMethod(javaCallbackRef, javaMethod, valueStr.jniValue());
    {{/if}}
}
{{/unless}}
{{/chip_server_global_responses}}

{{#zcl_clusters}}
{{#zcl_attributes_server removeKeys='isOptional'}}
{{! TODO: Add support for struct-typed attributes }}
{{#if_unsupported_attribute_callback type isArray ../id}}
{{else}}

{{#if_basic_attribute type ../id}}
{{else}}
CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback::CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback(jobject javaCallback, bool keepAlive) :
    chip::Callback::Callback<CHIP{{asUpperCamelCase parent.name}}Cluster{{asUpperCamelCase name}}AttributeCallbackType>(CallbackFn, this), keepAlive(keepAlive)
{
    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    if (env == nullptr) {
        ChipLogError(Zcl, "Could not create global reference for Java callback");
        return;
    }

    javaCallbackRef = env->NewGlobalRef(javaCallback);
    if (javaCallbackRef == nullptr) {
        ChipLogError(Zcl, "Could not create global reference for Java callback");
    }
}

CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback::~CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback() {
    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    if (env == nullptr)
    {
        ChipLogError(Zcl, "Could not delete global reference for Java callback");
        return;
    }
    env->DeleteGlobalRef(javaCallbackRef);
}
{{/if_basic_attribute}}

{{#if isArray}}
void CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback::CallbackFn(void * context, {{zapTypeToDecodableClusterObjectType type ns=parent.name isArgument=true}} list)
{
    chip::DeviceLayer::StackUnlock unlock;
    CHIP_ERROR err = CHIP_NO_ERROR;
    JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
    jobject javaCallbackRef;

    VerifyOrReturn(env != nullptr, ChipLogError(Zcl, "Could not get JNI env"));

    std::unique_ptr<CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback, decltype(&maybeDestroy)> cppCallback(reinterpret_cast<CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback *>(context), maybeDestroy);

    // It's valid for javaCallbackRef to be nullptr if the Java code passed in a null callback.
    javaCallbackRef = cppCallback.get()->javaCallbackRef;
    VerifyOrReturn(javaCallbackRef != nullptr, ChipLogProgress(Zcl, "Early return from attribute callback since Java callback is null"));

    jmethodID javaMethod;
    err = chip::JniReferences::GetInstance().FindMethod(env, javaCallbackRef, "onSuccess", "(Ljava/util/List;)V", &javaMethod);
    VerifyOrReturn(err == CHIP_NO_ERROR, ChipLogError(Zcl, "Could not find onSuccess() method"));

    {{>decode_value source="list" target="arrayListObj" cluster=parent.name depth=0}}

    env->ExceptionClear();
    env->CallVoidMethod(javaCallbackRef, javaMethod, arrayListObj);
}
{{else}}
  {{#if_basic_attribute type ../id}}
  {{else}}
    void CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback::CallbackFn(void * context, {{zapTypeToDecodableClusterObjectType type ns=parent.name isArgument=true}} value)
    {
        chip::DeviceLayer::StackUnlock unlock;
        CHIP_ERROR err = CHIP_NO_ERROR;
        JNIEnv * env = chip::JniReferences::GetInstance().GetEnvForCurrentThread();
        jobject javaCallbackRef;

        VerifyOrReturn(env != nullptr, ChipLogError(Zcl, "Could not get JNI env"));
        std::unique_ptr<CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback, decltype(&maybeDestroy)> cppCallback(reinterpret_cast<CHIP{{asUpperCamelCase parent.name}}{{asUpperCamelCase name}}AttributeCallback *>(context), maybeDestroy);

        // It's valid for javaCallbackRef to be nullptr if the Java code passed in a null callback.
        javaCallbackRef = cppCallback.get()->javaCallbackRef;
        VerifyOrReturn(javaCallbackRef != nullptr, ChipLogProgress(Zcl, "Early return from attribute callback since Java callback is null"));

        jmethodID javaMethod;
        err = chip::JniReferences::GetInstance().FindMethod(env, javaCallbackRef, "onSuccess", "({{#if isArray}}{{else if isStruct}}{{else if isOptional}}Ljava/util/Optional;{{else if (isOctetString type)}}[B{{else if (isCharString type)}}Ljava/lang/String;{{else}}{{asJniSignatureBasic type true}}{{/if}})V", &javaMethod);
        VerifyOrReturn(err == CHIP_NO_ERROR, ChipLogError(Zcl, "Could not find onSuccess() method"));

        {{>decode_value source="value" target="javaValue" cluster=parent.name depth=0}}

        env->CallVoidMethod(javaCallbackRef, javaMethod, javaValue);
    }
  {{/if_basic_attribute}}
{{/if}}
{{/if_unsupported_attribute_callback}}
{{/zcl_attributes_server}}
{{/zcl_clusters}}