node-java/src/java.cpp at master · NoamB/node-java · GitHub

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#include "java.h"

#include <string.h>

#include "javaObject.h"

#include "methodCallBaton.h"

#include <sstream>

/*static*/ v8::Persistent<v8::FunctionTemplate> Java::s_ct;

/*static*/ void Java::Init(v8::Handle<v8::Object> target) {

v8::HandleScope scope;

v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New(New);

s_ct = v8::Persistent<v8::FunctionTemplate>::New(t);

s_ct->InstanceTemplate()->SetInternalFieldCount(1);

s_ct->SetClassName(v8::String::NewSymbol("Java"));

NODE_SET_PROTOTYPE_METHOD(s_ct, "newInstance", newInstance);

NODE_SET_PROTOTYPE_METHOD(s_ct, "newInstanceSync", newInstanceSync);

NODE_SET_PROTOTYPE_METHOD(s_ct, "callStaticMethod", callStaticMethod);

NODE_SET_PROTOTYPE_METHOD(s_ct, "callStaticMethodSync", callStaticMethodSync);

NODE_SET_PROTOTYPE_METHOD(s_ct, "findClassSync", findClassSync);

NODE_SET_PROTOTYPE_METHOD(s_ct, "newArray", newArray);

NODE_SET_PROTOTYPE_METHOD(s_ct, "newByte", newByte);

NODE_SET_PROTOTYPE_METHOD(s_ct, "getStaticFieldValue", getStaticFieldValue);

NODE_SET_PROTOTYPE_METHOD(s_ct, "setStaticFieldValue", setStaticFieldValue);

target->Set(v8::String::NewSymbol("Java"), s_ct->GetFunction());

}

/*static*/ v8::Handle<v8::Value> Java::New(const v8::Arguments& args) {

v8::HandleScope scope;

Java *self = new Java();

self->Wrap(args.This());

self->handle_->Set(v8::String::New("classpath"), v8::Array::New());

self->handle_->Set(v8::String::New("options"), v8::Array::New());

return args.This();

}

Java::Java() {

this->m_jvm = NULL;

this->m_env = NULL;

}

Java::~Java() {

}

v8::Handle<v8::Value> Java::ensureJvm() {

if(!m_jvm) {

return createJVM(&this->m_jvm, &this->m_env);

}

return v8::Undefined();

}

v8::Handle<v8::Value> Java::createJVM(JavaVM** jvm, JNIEnv** env) {

JavaVM* jvmTemp;

JavaVMInitArgs args;

// setup classpath

std::ostringstream classPath;

classPath << "-Djava.class.path=";

v8::Local<v8::Value> classPathValue = handle_->Get(v8::String::New("classpath"));

if(!classPathValue->IsArray()) {

return ThrowException(v8::Exception::TypeError(v8::String::New("Classpath must be an array")));

}

v8::Local<v8::Array> classPathArray = v8::Array::Cast(*classPathValue);

for(uint32_t i=0; i<classPathArray->Length(); i++) {

if(i != 0) {

#ifdef WIN32

classPath << ";";

#else

classPath << ":";

#endif

}

v8::Local<v8::Value> arrayItemValue = classPathArray->Get(i);

if(!arrayItemValue->IsString()) {

return ThrowException(v8::Exception::TypeError(v8::String::New("Classpath must only contain strings")));

}

v8::Local<v8::String> arrayItem = arrayItemValue->ToString();

v8::String::AsciiValue arrayItemStr(arrayItem);

classPath << *arrayItemStr;

}

// get other options

v8::Local<v8::Value> optionsValue = handle_->Get(v8::String::New("options"));

if(!optionsValue->IsArray()) {

return ThrowException(v8::Exception::TypeError(v8::String::New("options must be an array")));

}

v8::Local<v8::Array> optionsArray = v8::Array::Cast(*optionsValue);

// create vm options

int vmOptionsCount = optionsArray->Length() + 1;

JavaVMOption* vmOptions = new JavaVMOption[vmOptionsCount];

vmOptions[0].optionString = strdup(classPath.str().c_str());

for(uint32_t i=0; i<optionsArray->Length(); i++) {

v8::Local<v8::Value> arrayItemValue = optionsArray->Get(i);

if(!arrayItemValue->IsString()) {

return ThrowException(v8::Exception::TypeError(v8::String::New("options must only contain strings")));

}

v8::Local<v8::String> arrayItem = arrayItemValue->ToString();

v8::String::AsciiValue arrayItemStr(arrayItem);

vmOptions[i+1].optionString = strdup(*arrayItemStr);

}

JNI_GetDefaultJavaVMInitArgs(&args);

args.version = JNI_VERSION_1_6;

args.ignoreUnrecognized = false;

args.options = vmOptions;

args.nOptions = vmOptionsCount;

JNI_CreateJavaVM(&jvmTemp, (void **)env, &args);

*jvm = jvmTemp;

return v8::Undefined();

}

/*static*/ v8::Handle<v8::Value> Java::newInstance(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

ARGS_BACK_CALLBACK();

// find class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

EXCEPTION_CALL_CALLBACK("Could not find class " << className.c_str());

return v8::Undefined();

}

// get method

jobjectArray methodArgs = v8ToJava(env, args, argsStart, argsEnd);

jobject method = javaFindConstructor(env, clazz, methodArgs);

if(method == NULL) {

EXCEPTION_CALL_CALLBACK("Could not find constructor");

return v8::Undefined();

}

// run

NewInstanceBaton* baton = new NewInstanceBaton(self, clazz, method, methodArgs, callback);

baton->run();

END_CALLBACK_FUNCTION("\"Constructor for class '" << className << "' called without a callback did you mean to use the Sync version?\"");

}

/*static*/ v8::Handle<v8::Value> Java::newInstanceSync(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

// find class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// find method

jobjectArray methodArgs = v8ToJava(env, args, argsStart, argsEnd);

jobject method = javaFindConstructor(env, clazz, methodArgs);

if(method == NULL) {

std::ostringstream errStr;

errStr << "Could not find constructor";

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// run

v8::Handle<v8::Value> callback = v8::Object::New();

NewInstanceBaton* baton = new NewInstanceBaton(self, clazz, method, methodArgs, callback);

v8::Handle<v8::Value> result = baton->runSync();

delete baton;

if(result->IsNativeError()) {

return ThrowException(result);

}

return scope.Close(result);

}

/*static*/ v8::Handle<v8::Value> Java::callStaticMethod(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

ARGS_FRONT_STRING(methodName);

ARGS_BACK_CALLBACK();

// find class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

EXCEPTION_CALL_CALLBACK("Could not create class " << className.c_str());

return v8::Undefined();

}

// find method

jobjectArray methodArgs = v8ToJava(env, args, argsStart, argsEnd);

jobject method = javaFindMethod(env, clazz, methodName, methodArgs);

if(method == NULL) {

EXCEPTION_CALL_CALLBACK("Could not find method \"" << methodName.c_str() << "\"");

return v8::Undefined();

}

// run

StaticMethodCallBaton* baton = new StaticMethodCallBaton(self, clazz, method, methodArgs, callback);

baton->run();

END_CALLBACK_FUNCTION("\"Static method '" << methodName << "' called without a callback did you mean to use the Sync version?\"");

}

/*static*/ v8::Handle<v8::Value> Java::callStaticMethodSync(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

ARGS_FRONT_STRING(methodName);

// find class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// find method

jobjectArray methodArgs = v8ToJava(env, args, argsStart, argsEnd);

jobject method = javaFindMethod(env, clazz, methodName, methodArgs);

if(method == NULL) {

std::ostringstream errStr;

errStr << "Could not find method \"" << methodName.c_str() << "\"";

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// run

v8::Handle<v8::Value> callback = v8::Object::New();

StaticMethodCallBaton* baton = new StaticMethodCallBaton(self, clazz, method, methodArgs, callback);

v8::Handle<v8::Value> result = baton->runSync();

delete baton;

if(result->IsNativeError()) {

return ThrowException(result);

}

return scope.Close(result);

}

/*static*/ v8::Handle<v8::Value> Java::findClassSync(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

// find class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// run

v8::Handle<v8::Value> result = javaToV8(self, env, clazz);

return scope.Close(result);

}

/*static*/ v8::Handle<v8::Value> Java::newArray(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

// argument - array

if(args.Length() < argsStart+1 || !args[argsStart]->IsArray()) {

std::ostringstream errStr;

errStr << "Argument " << (argsStart+1) << " must be an array";

return ThrowException(v8::Exception::TypeError(v8::String::New(errStr.str().c_str())));

}

v8::Local<v8::Array> arrayObj = v8::Local<v8::Array>::Cast(args[argsStart]);

UNUSED_VARIABLE(argsEnd);

// find class and method

jarray results;

if(strcmp(className.c_str(), "byte") == 0) {

results = env->NewByteArray(arrayObj->Length());

for(uint32_t i=0; i<arrayObj->Length(); i++) {

v8::Local<v8::Value> item = arrayObj->Get(i);

jobject val = v8ToJava(env, item);

jclass byteClazz = env->FindClass("java/lang/Byte");

jmethodID byte_byteValue = env->GetMethodID(byteClazz, "byteValue", "()B");

jbyte byteValues[1];

byteValues[0] = env->CallByteMethod(val, byte_byteValue);

env->SetByteArrayRegion((jbyteArray)results, i, 1, byteValues);

}

else

{

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// create array

results = env->NewObjectArray(arrayObj->Length(), clazz, NULL);

for(uint32_t i=0; i<arrayObj->Length(); i++) {

v8::Local<v8::Value> item = arrayObj->Get(i);

jobject val = v8ToJava(env, item);

env->SetObjectArrayElement((jobjectArray)results, i, val);

if(env->ExceptionOccurred()) {

std::ostringstream errStr;

v8::String::AsciiValue valStr(item);

errStr << "Could not add item \"" << *valStr << "\" to array.";

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

return scope.Close(JavaObject::New(self, results));

}

/*static*/ v8::Handle<v8::Value> Java::newByte(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

if(args.Length() != 1) {

return ThrowException(v8::Exception::TypeError(v8::String::New("newByte only takes 1 argument")));

}

// argument - value

if(!args[0]->IsNumber()) {

return ThrowException(v8::Exception::TypeError(v8::String::New("Argument 1 must be a number")));

}

v8::Local<v8::Number> val = args[0]->ToNumber();

jclass clazz = env->FindClass("java/lang/Byte");

jmethodID constructor = env->GetMethodID(clazz, "<init>", "(B)V");

jobject newObj = env->NewObject(clazz, constructor, (jbyte)val->Value());

return scope.Close(JavaObject::New(self, newObj));

}

/*static*/ v8::Handle<v8::Value> Java::getStaticFieldValue(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

ARGS_FRONT_STRING(fieldName);

UNUSED_VARIABLE(argsEnd);

// find the class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// get the field

jobject field = javaFindField(env, clazz, fieldName);

if(field == NULL) {

std::ostringstream errStr;

errStr << "Could not find field " << fieldName.c_str() << " on class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

jclass fieldClazz = env->FindClass("java/lang/reflect/Field");

jmethodID field_get = env->GetMethodID(fieldClazz, "get", "(Ljava/lang/Object;)Ljava/lang/Object;");

// get field value

jobject val = env->CallObjectMethod(field, field_get, NULL);

if(env->ExceptionOccurred()) {

std::ostringstream errStr;

errStr << "Could not get field " << fieldName.c_str() << " on class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

return scope.Close(javaToV8(self, env, val));

}

/*static*/ v8::Handle<v8::Value> Java::setStaticFieldValue(const v8::Arguments& args) {

v8::HandleScope scope;

Java* self = node::ObjectWrap::Unwrap<Java>(args.This());

v8::Handle<v8::Value> ensureJvmResults = self->ensureJvm();

if(!ensureJvmResults->IsUndefined()) {

return ensureJvmResults;

}

JNIEnv* env = self->getJavaEnv();

int argsStart = 0;

int argsEnd = args.Length();

// arguments

ARGS_FRONT_CLASSNAME();

ARGS_FRONT_STRING(fieldName);

// argument - new value

if(args.Length() < argsStart+1) {

std::ostringstream errStr;

errStr << "setStaticFieldValue requires " << (argsStart+1) << " arguments";

return ThrowException(v8::Exception::TypeError(v8::String::New(errStr.str().c_str())));

}

jobject newValue = v8ToJava(env, args[argsStart]);

argsStart++;

UNUSED_VARIABLE(argsEnd);

// find the class

jclass clazz = javaFindClass(env, className);

if(clazz == NULL) {

std::ostringstream errStr;

errStr << "Could not create class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

// get the field

jobject field = javaFindField(env, clazz, fieldName);

if(field == NULL) {

std::ostringstream errStr;

errStr << "Could not find field " << fieldName.c_str() << " on class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

jclass fieldClazz = env->FindClass("java/lang/reflect/Field");

jmethodID field_set = env->GetMethodID(fieldClazz, "set", "(Ljava/lang/Object;Ljava/lang/Object;)V");

//printf("newValue: %s\n", javaObjectToString(env, newValue).c_str());

// set field value

env->CallObjectMethod(field, field_set, NULL, newValue);

if(env->ExceptionOccurred()) {

std::ostringstream errStr;

errStr << "Could not set field " << fieldName.c_str() << " on class " << className.c_str();

return ThrowException(javaExceptionToV8(env, errStr.str()));

}

return v8::Undefined();

}

node-java/src/java.cpp at master · NoamB/node-java · GitHub

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