JavaCPP export Library clone as C++ class files #17
Labels
Comments
|
For example with the help of JavaCPP. |
|
It wasn't designed for that, no... Check the README.md file for some options. |
|
I know but its not that hard to do with ANTLR Library |
|
I'm not sure why ANTLR would help with that. We don't really need to parse anything... Am I missing something? |
|
so how can you convert Java code to C++ ?? I can help you about library. |
|
You can call JavaVM inside C++ with the help of JNI Library on C++ |
|
You can invoke with that code: JavaVM *InitJVM(JNIEnv **env2) {
JavaVM* vm;
JNIEnv* env;
JavaVMInitArgs vm_args;
JavaVMOption options[3];
CHAR lpDataTempClass[MAX_PATH];
CHAR lpchDataLib[MAX_PATH];
TCHAR lpchRuntimelib[MAX_PATH];
TCHAR lpchJavaPath[MAX_PATH];
jobjectArray joApplicationArgs;
*env2 = NULL;
/* disable JIT */
//options[0].optionString ="-Djava.compiler=NONE";
/* user classes */
//"-Djava.class.path=c:\\myclasses"
//Pointer to the function JNI_CreateJavaVM
HKEY key;
BOOL foundDLL;
TCHAR lpchRuntimePath[MAX_PATH];
TCHAR lpchJavaHome[MAX_PATH];
TCHAR lpchThisPath[MAX_PATH];
GetThisPath(lpchThisPath,MAX_PATH);
HRESULT result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"Software\\JavaSoft\\Java Runtime Environment", 0, KEY_QUERY_VALUE,&key);
char *lpVal = readStringRegValue(key, "CurrentVersion");
if ( lpVal != NULL ) {
TCHAR lpchJVMRuntime[MAX_PATH];
HKEY subkey;
result = RegOpenKeyExA(key, lpVal, 0, KEY_QUERY_VALUE, &subkey);
if(result == ERROR_SUCCESS) {
readStringRegValueW(subkey, _T("RuntimeLib"), lpchJVMRuntime );
readStringRegValueW(subkey, L"JavaHome", lpchJavaHome);
//lpchJavaHome = readStringRegValue( subkey , "JavaHome" );
if(hinst_JVM == NULL) {
//WCHAR achRuntimePath[MAX_PATH];
//MultiByteToWideChar( CP_ACP , 0 , lpchJVMRuntime , -1 , achRuntimePath , MAX_PATH );
//CHAR *achCustomLib = "C:\\Program Files\\Java\\jre6\\bin\\client\\jvm.dll";
hinst_JVM = LoadLibraryW( lpchJVMRuntime );
DWORD errCode = GetLastError( );
if (!hinst_JVM) {
WCHAR lpchJVMBinPath[MAX_PATH];
WCHAR lpchFullFilePath[MAX_PATH];
WCHAR lpchJavaHomeW[MAX_PATH];
WCHAR lpchClientPath[MAX_PATH];
//hinst_JVM = LoadLibraryA("jvm.dll");
EnumerateSubKeys(HKEY_LOCAL_MACHINE, "Software\\JavaSoft\\Java Runtime Environment", &foundDLL, lpchRuntimePath, lpchJavaHome);
if (foundDLL) {
wsprintfW(lpchJVMBinPath, L"%s\\bin", lpchJavaHome);
wsprintfW(lpchClientPath, L"%s\\bin\\client\\", lpchJavaHome);
CVector<CUIString> values;
listFiles(lpchJVMBinPath, values);
for (int j = 0; j < values.size(); j++) {
CUIString *str = values.getElementAt(j);
WCHAR *value = str->c_str();
if (wcsstr(value, L"msvcr") && wcsstr(value, L".dll")) {
//lpchFullFilePath
WCHAR wchCombinedPath[MAX_PATH];
wsprintfW(wchCombinedPath, L"%s\\%s", lpchJVMBinPath, value);
wcscat(lpchClientPath, value);
CopyFile(wchCombinedPath, lpchClientPath, FALSE);
wcscat(lpchThisPath, _T("\\"));
wcscat(lpchThisPath, value);
CopyFile(wchCombinedPath, lpchThisPath, FALSE);
break;
}
}
}
else {
//no jvm
RegCloseKey(key);
RegCloseKey(subkey);
return NULL;
}
}
//jvm.dll found
else {
WCHAR lpchJVMBinPath[MAX_PATH];
WCHAR lpchFullFilePath[MAX_PATH];
WCHAR lpchJavaHomeW[MAX_PATH];
WCHAR lpchClientPath[MAX_PATH];
wsprintfW(lpchJVMBinPath, L"%s\\bin", lpchJavaHome);
wsprintfW(lpchClientPath, L"%s\\bin\\client\\", lpchJavaHome);
CVector<CUIString> values;
listFiles(lpchJVMBinPath, values);
for (int j = 0; j < values.size(); j++) {
CUIString *str = values.getElementAt(j);
WCHAR *value = str->c_str();
if (wcsstr(value, L"msvcr") && wcsstr(value, L".dll")) {
//lpchFullFilePath
WCHAR wchCombinedPath[MAX_PATH];
wsprintfW(wchCombinedPath, L"%s\\%s", lpchJVMBinPath, value);
wcscat(lpchClientPath, value);
CopyFile(wchCombinedPath, lpchClientPath, FALSE);
wcscat(lpchThisPath, _T("\\"));
wcscat(lpchThisPath, value);
CopyFile(wchCombinedPath, lpchThisPath , FALSE);
break;
}
}
}
}
RegCloseKey(subkey);
}
} else {
//NO JVM Installed
}
RegCloseKey(key);
if(hinst_JVM == NULL) {
return NULL;
}
//java -Djava.library.path=C:\Users\Kadir\IdeaProjects\WebcamTransmitter\nativeLib\windows\x64 -cp logback-classic-1.1.3.jar;logback-core-1.1.3.jar;WebcamTransmitter-1.0-SNAPSHOT.jar;bridj-0.6.2.jar;ffmpeg-2.6.1-0.11.jar;ffmpeg-2.6.1-0.11-windows-x86_64.jar;javacpp-0.11.jar;webcam-capture-0.3.10.jar;slf4j-api-1.7.2.jar service.WebcamCapture
//java -Djava.library.path=C:\Users\Kadir\IdeaProjects\WebcamTransmitter\nativeLib\windows\x86 -cp logback-classic-1.1.3.jar;logback-core-1.1.3.jar;WebcamTransmitter-1.0-SNAPSHOT.jar;bridj-0.6.2.jar;ffmpeg-2.6.1-0.11.jar;ffmpeg-2.6.1-0.11-windows-x86_64.jar;javacpp-0.11.jar;webcam-capture-0.3.10.jar;slf4j-api-1.7.2.jar service.WebcamCapture
//Get the address of the function
pfnCreateJavaVM = (CreateJavaVM_t*)GetProcAddress(hinst_JVM, "JNI_CreateJavaVM");
pfnGetDefaultJavaVMOptions = (OptionsJavaVM_t*)GetProcAddress(hinst_JVM, "JNI_GetDefaultJavaVMInitArgs");
//-Djava.class.path
//"logback-classic-1.1.3.jar;logback-core-1.1.3.jar;WebcamTransmitter-1.0-SNAPSHOT.jar;bridj-0.6.2.jar;ffmpeg-2.6.1-0.11.jar;ffmpeg-2.6.1-0.11-windows-x86_64.jar;javacpp-0.11.jar;webcam-capture-0.3.10.jar;slf4j-api-1.7.2.jar"
CHAR achTemp[MAX_PATH];
{
TCHAR achTemp2[MAX_PATH];
GetTempPath(MAX_PATH, achTemp2);
int sizeNeed = WideCharToMultiByte(CP_UTF8, 0, achTemp2, MAX_PATH, achTemp, 0, NULL, NULL);
WideCharToMultiByte(CP_UTF8, 0, achTemp2, MAX_PATH, achTemp, sizeNeed, NULL, NULL);
int dataLen = wcslen(achTemp2) - 1;
if (achTemp[dataLen] == '\\') {
achTemp[dataLen] = L'\0';
}
}
//SHCreateDirectoryEx(T("C:\\Foo\\Bar\\Baz"));
sprintf( lpDataTempClass, "-Djava.class.path=%s;%ls\\lib;", achTemp , lpchJavaHome );
options[ 0 ].optionString = lpDataTempClass;
CHAR lpDataTempClass2[ 2048 ];
CHAR lpData[MAX_PATH];
TCHAR lpData2[MAX_PATH];
GetThisPath(lpData2, 2048);
int sizeNeed = WideCharToMultiByte(CP_UTF8, 0, lpData2, MAX_PATH, lpData , 0 , NULL , NULL );
WideCharToMultiByte(CP_UTF8, 0, lpData2, MAX_PATH, lpData , sizeNeed, NULL, NULL);
#ifdef _WIN64
sprintf(lpDataTempClass2, "%s\\libn\\x64", lpData);
CreateDirectoryRecA( lpDataTempClass2 );
sprintf(lpDataTempClass2, "-Djava.library.path=%s\\bin;%s\\libn\\x64", lpchJavaHome, lpData );
#else
sprintf(lpDataTempClass2, "%s\\libn\\x86", lpData);
CreateDirectoryRecA(lpDataTempClass2);
sprintf(lpDataTempClass2, "-Djava.library.path=%s\\bin;%s\\libn\\x86", lpchJavaHome, lpData );
#endif
options[1].optionString = lpDataTempClass2;
//options[0].optionString = "-Djava.complier=JIT";
/* native lib path */
//"-Djava.library.path=c:\\mylibs"
//sprintf(lpchDataLib,"-Djava.library.path=%s",lpchLibrary);
options[2].optionString = "-Djava.complier=JIT";
pfnGetDefaultJavaVMOptions(&vm_args);
vm_args.version = JNI_VERSION_1_6;//JNI_VERSION_1_4;
vm_args.options = options;
vm_args.nOptions = 3;
vm_args.ignoreUnrecognized = TRUE;
if(pfnCreateJavaVM == NULL) {
return NULL;
}
if(!pfnGetDefaultJavaVMOptions) {
FreeLibrary(hinst_JVM);
return NULL;
}
//Create JVM
jint iRetval = pfnCreateJavaVM(&vm, (void**)&env,&vm_args);
//Error handling.
if (iRetval < 0) {
vm_args.nOptions = 2;
options[2].optionString = NULL;
iRetval = pfnCreateJavaVM(&vm, (void**)&env,&vm_args);
if(iRetval < 0) {
return NULL;
}
}
*env2 = env;
return vm;
} |
|
That works for Win32. |
|
JavaCPP will make C++ code from Java class library. |
|
jar files will be used a dll inside C++ can be good idea! |
|
I will give you example C++ code for that if you want to add such capability to JavaCPP |
|
There's also jni.hpp these days: https://github.com/mapbox/jni.hpp |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hello again.
Now i am doing C++ and Java Application.
I want C++ with Java Interop.
To do i use JavaCPP.
But the problem is , can javacpp export library clone as C++ also ?
so interop between java and C++ will be easier
The text was updated successfully, but these errors were encountered: