35 lines
930 B
C++
35 lines
930 B
C++
|
#pragma once
|
||
|
|
|
||
|
|
#include "JniContext.h"
|
||
|
|
#include <optional>
|
||
|
|
|
||
|
|
class JBindings {
|
||
|
|
protected:
|
||
|
|
JBindings(const char* className) {
|
||
|
|
JNIEnv* env = JniContext::getJniEnv();
|
||
|
|
_class = findClass(env, className);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::optional<jfieldID> getStaticFieldID(const char* name, const char* signature) {
|
||
|
|
try{
|
||
|
|
auto result = JniContext::getJniEnv()->GetStaticFieldID(_class, name, signature);
|
||
|
|
JniContext::checkException();
|
||
|
|
return result;
|
||
|
|
}catch(...){
|
||
|
|
return std::nullopt;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
//
|
||
|
|
|
||
|
|
static jclass findClass(JNIEnv* env, const char* className) {
|
||
|
|
auto classLocalRef = env->FindClass(className);
|
||
|
|
if(classLocalRef == nullptr){
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
auto globalRef = (jclass)env->NewGlobalRef(classLocalRef);
|
||
|
|
env->DeleteLocalRef(classLocalRef);
|
||
|
|
return globalRef;
|
||
|
|
}
|
||
|
|
|
||
|
|
jclass _class;
|
||
|
|
};
|