node-java/src/methodCallBaton.cpp at master · AthosLui/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 constructorClazz = env->FindClass("java/lang/reflect/Constructor");

jmethodID constructor_newInstance = env->GetMethodID(constructorClazz, "newInstance", "([Ljava/lang/Object;)Ljava/lang/Object;");

//printf("invoke: %s\n", javaMethodCallToString(env, m_method, constructor_newInstance, m_args).c_str());

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

jobject result = env->CallObjectMethod(m_method, constructor_newInstance, 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) {

jmethodID method_invoke = getMethodInvokeMethodId(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());

}

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

jobject result = env->CallObjectMethod(m_method, method_invoke, 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) {

jmethodID method_invoke = getMethodInvokeMethodId(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());

}

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

jobject result = env->CallObjectMethod(m_method, method_invoke, 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() {

m_javaObject->Unref();

}

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

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