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186 lines (158 loc) · 6.17 KB
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#include "utils.h"
#include <string.h>
#include <algorithm>
std::list<jobject> javaReflectionGetMethods(JNIEnv *env, jclass clazz) {
std::list<jobject> results;
jclass clazzclazz = env->GetObjectClass(clazz);
jmethodID methodId = env->GetMethodID(clazzclazz, "getMethods", "()[Ljava/lang/reflect/Method;");
// TODO: filter out static and prive methods
jobjectArray methodObjects = (jobjectArray)env->CallObjectMethod(clazz, methodId);
jsize methodCount = env->GetArrayLength(methodObjects);
for(jsize i=0; i<methodCount; i++) {
jobject obj = env->GetObjectArrayElement(methodObjects, i);
results.push_back(obj);
}
return results;
}
std::list<jobject> javaReflectionGetStaticMethods(JNIEnv *env, jclass clazz) {
std::list<jobject> results;
jclass clazzclazz = env->GetObjectClass(clazz);
jmethodID methodId = env->GetMethodID(clazzclazz, "getDeclaredMethods", "()[Ljava/lang/reflect/Method;");
// TODO: filter out instance and prive methods
jobjectArray methodObjects = (jobjectArray)env->CallObjectMethod(clazz, methodId);
jsize methodCount = env->GetArrayLength(methodObjects);
for(jsize i=0; i<methodCount; i++) {
jobject obj = env->GetObjectArrayElement(methodObjects, i);
results.push_back(obj);
}
return results;
}
std::list<jobject> javaReflectionGetConstructors(JNIEnv *env, jclass clazz) {
std::list<jobject> results;
jclass clazzclazz = env->GetObjectClass(clazz);
jmethodID methodId = env->GetMethodID(clazzclazz, "getConstructors", "()[Ljava/lang/reflect/Constructor;");
jobjectArray methodObjects = (jobjectArray)env->CallObjectMethod(clazz, methodId);
jsize methodCount = env->GetArrayLength(methodObjects);
for(jsize i=0; i<methodCount; i++) {
jobject obj = env->GetObjectArrayElement(methodObjects, i);
results.push_back(obj);
}
return results;
}
std::string javaToString(JNIEnv *env, jstring str) {
const char* chars = env->GetStringUTFChars(str, NULL);
std::string results = chars;
env->ReleaseStringUTFChars(str, chars);
return results;
}
std::string javaObjectToString(JNIEnv *env, jobject obj) {
if(obj == NULL) {
return "";
}
jclass objClazz = env->GetObjectClass(obj);
jmethodID methodId = env->GetMethodID(objClazz, "toString", "()Ljava/lang/String;");
jstring result = (jstring)env->CallObjectMethod(obj, methodId);
return javaToString(env, result);
}
jobject javaFindBestMatchingMethod(
JNIEnv *env,
std::list<jobject>& methods,
const char *methodName,
std::list<int>& argTypes) {
jclass methodClazz = env->FindClass("java/lang/reflect/Method");
jmethodID method_getNameMethod = env->GetMethodID(methodClazz, "getName", "()Ljava/lang/String;");
jmethodID method_getParameterTypes = env->GetMethodID(methodClazz, "getParameterTypes", "()[Ljava/lang/Class;");
for(std::list<jobject>::iterator it = methods.begin(); it != methods.end(); it++) {
std::string itMethodName = javaToString(env, (jstring)env->CallObjectMethod(*it, method_getNameMethod));
if(itMethodName == methodName) {
jarray parameters = (jarray)env->CallObjectMethod(*it, method_getParameterTypes);
if(env->GetArrayLength(parameters) == (jsize)argTypes.size()) {
return *it; // TODO: check parameters
}
}
}
return NULL;
}
jobject javaFindBestMatchingConstructor(
JNIEnv *env,
std::list<jobject>& constructors,
std::list<int>& argTypes) {
jclass constructorClazz = env->FindClass("java/lang/reflect/Constructor");
jmethodID constructor_getParameterTypes = env->GetMethodID(constructorClazz, "getParameterTypes", "()[Ljava/lang/Class;");
for(std::list<jobject>::iterator it = constructors.begin(); it != constructors.end(); it++) {
jarray parameters = (jarray)env->CallObjectMethod(*it, constructor_getParameterTypes);
if(env->GetArrayLength(parameters) == (jsize)argTypes.size()) {
return *it; // TODO: check parameters
}
}
return NULL;
}
JNIEnv* javaAttachCurrentThread(JavaVM* jvm) {
JNIEnv* env;
JavaVMAttachArgs attachArgs;
attachArgs.version = JNI_VERSION_1_4;
attachArgs.name = NULL;
attachArgs.group = NULL;
jvm->AttachCurrentThread((void**)&env, &attachArgs);
return env;
}
void javaDetachCurrentThread(JavaVM* jvm) {
jvm->DetachCurrentThread();
}
jvalueType javaGetType(JNIEnv *env, jclass type) {
// TODO: has to be a better way
const char *typeStr = javaObjectToString(env, type).c_str();
//printf("%s\n", typeStr);
if(strcmp(typeStr, "int") == 0) {
return TYPE_INT;
} else if(strcmp(typeStr, "long") == 0) {
return TYPE_LONG;
} else if(strcmp(typeStr, "void") == 0) {
return TYPE_VOID;
} else if(strcmp(typeStr, "boolean") == 0) {
return TYPE_BOOLEAN;
} else if(strcmp(typeStr, "class java.lang.String") == 0) {
return TYPE_STRING;
}
return TYPE_OBJECT;
}
jclass javaFindClass(JNIEnv* env, std::string className) {
std::replace(className.begin(), className.end(), '.', '/');
jclass clazz = env->FindClass(className.c_str());
return clazz;
}
jobject v8ToJava(JNIEnv* env, v8::Local<v8::Value> arg, int *methodArgType) {
if(arg->IsString()) {
*methodArgType = TYPE_STRING;
v8::String::AsciiValue val(arg->ToString());
return env->NewStringUTF(*val);
} else {
// TODO: handle other arg types
*methodArgType = TYPE_OBJECT;
return NULL;
}
}
jarray v8ToJava(JNIEnv* env, const v8::Arguments& args, int start, int end, std::list<int> *methodArgTypes) {
jclass clazz = env->FindClass("java/lang/Object");
jobjectArray results = env->NewObjectArray(end-start, clazz, NULL);
for(int i=start; i<end; i++) {
int methodArgType;
jobject val = v8ToJava(env, args[i], &methodArgType);
env->SetObjectArrayElement(results, i - start, val);
if(methodArgTypes) {
methodArgTypes->push_back(methodArgType);
}
}
return results;
}
v8::Handle<v8::Value> javaExceptionToV8(JNIEnv* env, const std::string& alternateMessage) {
jthrowable ex = env->ExceptionOccurred();
if(ex) {
printf("BEGIN Java Exception -------\n");
env->ExceptionDescribe(); // TODO: handle error
printf("END Java Exception ---------\n");
return v8::Exception::TypeError(v8::String::New("java exception"));
} else {
return v8::Exception::TypeError(v8::String::New(alternateMessage.c_str()));
}
}