node-java/src-cpp/methodCallBaton.cpp at master · specs-feup/node-java · GitHub

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#include "methodCallBaton.h"

#include "java.h"

#include "javaObject.h"

#include "javaScope.h"

jmethodID MethodCallBaton::m_methodInvokeMethodId = 0;

Nan::Callback *toNanCallback(v8::Local<v8::Value> &callback) {

if (callback->IsFunction()) {

return new Nan::Callback(callback.As<v8::Function>());

}

return NULL;

}

MethodCallBaton::MethodCallBaton(Java *java, jobject method, jarray args, v8::Local<v8::Value> &callback)

: Nan::AsyncWorker(toNanCallback(callback)) {

JNIEnv *env = java->getJavaEnv();

m_java = java;

m_args = (jarray)env->NewGlobalRef(args);

m_method = env->NewGlobalRef(method);

m_error = NULL;

m_result = NULL;

}

MethodCallBaton::~MethodCallBaton() {

JNIEnv *env = m_java->getJavaEnv();

if (m_result) {

env->DeleteGlobalRef(m_result);

m_result = NULL;

}

if (m_error) {

env->DeleteGlobalRef(m_error);

m_error = NULL;

}

env->DeleteGlobalRef(m_args);

m_args = NULL;

env->DeleteGlobalRef(m_method);

m_method = NULL;

}

jmethodID MethodCallBaton::getMethodInvokeMethodId(JNIEnv *env) {

if (m_methodInvokeMethodId == 0) {

jclass methodClazz = env->FindClass("java/lang/reflect/Method");

m_methodInvokeMethodId =

env->GetMethodID(methodClazz, "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");

}

return m_methodInvokeMethodId;

}

void MethodCallBaton::run() { Nan::AsyncQueueWorker(this); }

v8::Local<v8::Value> MethodCallBaton::runSync() {

JNIEnv *env = m_java->getJavaEnv();

ExecuteInternal(env);

return resultsToV8(env);

}

// called by NanAsyncWorker. This will be on a worker thread

void MethodCallBaton::Execute() {

JNIEnv *env = javaGetEnv(this->m_java->getJvm(), this->m_java->getClassLoader());

JavaScope javaScope(env);

ExecuteInternal(env);

}

// callback from NanAsyncWorker. This will be on the v8 main thread

void MethodCallBaton::WorkComplete() {

Nan::HandleScope scope;

if (callback) {

JNIEnv *env = javaGetEnv(this->m_java->getJvm(), this->m_java->getClassLoader());

JavaScope javaScope(env);

v8::Local<v8::Value> result = resultsToV8(env);

if (result->IsNativeError()) {

v8::Local<v8::Value> argv[] = {result};

callback->Call(1, argv, async_resource);

} else {

v8::Local<v8::Value> argv[] = {Nan::Undefined(), result};

callback->Call(2, argv, async_resource);

}

delete callback;

callback = NULL;

}

v8::Local<v8::Value> MethodCallBaton::resultsToV8(JNIEnv *env) {

Nan::EscapableHandleScope scope;

if (m_error) {

jthrowable cause = m_error;

// if we've caught an InvocationTargetException exception,

// let's grab the cause. users don't necessarily know that

// we're invoking the methods through reflection

jclass invocationExceptionClazz = env->FindClass("java/lang/reflect/InvocationTargetException");

if (env->IsInstanceOf(m_error, invocationExceptionClazz)) {

jclass throwableClazz = env->FindClass("java/lang/Throwable");

jmethodID throwable_getCause = env->GetMethodID(throwableClazz, "getCause", "()Ljava/lang/Throwable;");

cause = (jthrowable)env->CallObjectMethod(m_error, throwable_getCause);

checkJavaException(env);

}

v8::Local<v8::Value> err = javaExceptionToV8(m_java, env, cause, m_errorString);

return scope.Escape(err);

}

return scope.Escape(javaToV8(m_java, env, m_result));

}

void NewInstanceBaton::ExecuteInternal(JNIEnv *env) {

jclass batonClazz = env->FindClass("node/MethodCallBaton");

jmethodID newInstance = env->GetStaticMethodID(

batonClazz, "newInstance", "(Ljava/lang/reflect/Constructor;[Ljava/lang/Object;)Ljava/lang/Object;");

jarray args = javaGetArgsForConstructor(env, m_method, m_args);

jobject result = env->CallStaticObjectMethod(batonClazz, newInstance, m_method, args);

if (env->ExceptionCheck()) {

jthrowable ex = env->ExceptionOccurred();

env->ExceptionClear();

m_error = (jthrowable)env->NewGlobalRef(ex);

m_errorString = "Error creating class";

return;

}

m_result = env->NewGlobalRef(result);

}

void StaticMethodCallBaton::ExecuteInternal(JNIEnv *env) {

printf("calling %s\n", javaObjectToString(env, m_method).c_str());

printf("arguments\n");

for(int i=0; i<env->GetArrayLength(m_args); i++) {

jobject o = env->GetObjectArrayElement((jobjectArray)m_args, i);

jclass c = env->GetObjectClass(o);

printf(" %s (%s)\n", javaObjectToString(env, o).c_str(), javaObjectToString(env, c).c_str());

}

jclass batonClazz = env->FindClass("node/MethodCallBaton");

jmethodID invokeMethod =

env->GetStaticMethodID(batonClazz, env->GetVersion() >= 0x90000 ? "invokeMethod9" : "invokeMethod",

"(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");

jarray args = javaGetArgsForMethod(env, m_method, m_args);

jobject result = env->CallStaticObjectMethod(batonClazz, invokeMethod, m_method, NULL, args);

if (env->ExceptionCheck()) {

jthrowable ex = env->ExceptionOccurred();

env->ExceptionClear();

m_error = (jthrowable)env->NewGlobalRef(ex);

m_errorString = "Error running static method";

return;

}

m_result = env->NewGlobalRef(result);

}

void InstanceMethodCallBaton::ExecuteInternal(JNIEnv *env) {

printf("calling %s\n", javaObjectToString(env, m_method).c_str());

printf("arguments\n");

for(int i=0; i<env->GetArrayLength(m_args); i++) {

printf(" %s\n", javaObjectToString(env, env->GetObjectArrayElement((jobjectArray)m_args, i)).c_str());

}

jclass batonClazz = env->FindClass("node/MethodCallBaton");

jmethodID invokeMethod =

env->GetStaticMethodID(batonClazz, env->GetVersion() >= 0x90000 ? "invokeMethod9" : "invokeMethod",

"(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;");

jarray args = javaGetArgsForMethod(env, m_method, m_args);

jobject result = env->CallStaticObjectMethod(batonClazz, invokeMethod, m_method, m_javaObject->getObject(), args);

if (env->ExceptionCheck()) {

jthrowable ex = env->ExceptionOccurred();

env->ExceptionClear();

m_error = (jthrowable)env->NewGlobalRef(ex);

m_errorString = "Error running instance method";

return;

}

if (result == NULL) {

m_result = NULL;

} else {

m_result = env->NewGlobalRef(result);

}

NewInstanceBaton::NewInstanceBaton(Java *java, jclass clazz, jobject method, jarray args,

v8::Local<v8::Value> &callback)

: MethodCallBaton(java, method, args, callback) {

JNIEnv *env = m_java->getJavaEnv();

m_clazz = (jclass)env->NewGlobalRef(clazz);

}

NewInstanceBaton::~NewInstanceBaton() {

JNIEnv *env = m_java->getJavaEnv();

env->DeleteGlobalRef(m_clazz);

m_clazz = NULL;

}

StaticMethodCallBaton::StaticMethodCallBaton(Java *java, jclass clazz, jobject method, jarray args,

v8::Local<v8::Value> &callback)

: MethodCallBaton(java, method, args, callback) {

JNIEnv *env = m_java->getJavaEnv();

m_clazz = (jclass)env->NewGlobalRef(clazz);

}

StaticMethodCallBaton::~StaticMethodCallBaton() {

JNIEnv *env = m_java->getJavaEnv();

env->DeleteGlobalRef(m_clazz);

m_clazz = NULL;

}

InstanceMethodCallBaton::InstanceMethodCallBaton(Java *java, JavaObject *obj, jobject method, jarray args,

v8::Local<v8::Value> &callback)

: MethodCallBaton(java, method, args, callback) {

m_javaObject = obj;

m_javaObject->Ref();

}

InstanceMethodCallBaton::~InstanceMethodCallBaton() {

if (m_javaObject) {

m_javaObject->Unref();

m_javaObject = NULL;

}

node-java/src-cpp/methodCallBaton.cpp at master · specs-feup/node-java · GitHub

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