public static JavaEnvWrapper init(
JNI_VERSION version = JNI_VERSION.v1_6,
string[] options = null,
bool ignoreUnrecognized = false
)
{
IntPtr optionsPtr = IntPtr.Zero;
if (options != null && options.Length > 0)
{
int optSize = Marshal.SizeOf <JavaVMOption>();
//Leave the trash laying around cause this is a singleton
//Also cause I don't know when java will try to read these
optionsPtr = Marshal.AllocHGlobal(optSize * options.Length);
var optArray = (JavaVMOption *)optionsPtr.ToPointer();
optArray[1] = new JavaVMOption();
for (int i = 0; i < options.Length; i++)
{
optArray[i].optionString = Marshal.StringToHGlobalAnsi(options[i]);
optArray[i].extraInfo = IntPtr.Zero;
}
}
var result = new JavaEnvWrapper(
version: version,
nOptions: options?.Length ?? 0,
options: optionsPtr,
ignoreUnrecognized: (byte)(ignoreUnrecognized ? 1 : 0)
);
return(result);
}
private JavaEnvWrapper(
JNI_VERSION version = JNI_VERSION.v1_6,
int nOptions = 0,
IntPtr options = default,
byte ignoreUnrecognized = 0,
string threadName = null
)
{
lock (_JVMLinkLock) loadJavaLibrary();
this.version = version;
if (JVMInstance == null)
{
var args = new JavaVMInitArgs {
version = version,
nOptions = nOptions,
options = options,
ignoreUnrecognized = ignoreUnrecognized
};
int retc = _JNI_CreateJavaVM(
out _jvm,
out _env,
ref args
);
JVMInstance = this._jvm;
}
else
{
this._jvm = JVMInstance;
var namePtr = Marshal.StringToHGlobalAnsi(threadName);
var args = new JavaVMAttachArgs {
version = version,
name = namePtr,
extraInfo = IntPtr.Zero
};
Marshal.GetDelegateForFunctionPointer <_AttachCurrentThread>(
JVMInstance->fTable->AttachCurrentThread
).Invoke(
JVMInstance,
out _env,
ref args
);
}
this._findClass = Marshal.GetDelegateForFunctionPointer <_FindClassD>(_env->fTable->FindClass);
this._GetStaticMethodID = Marshal.GetDelegateForFunctionPointer <_GetStaticMethodIDD>(_env->fTable->GetStaticMethodID);
this._CallStaticMethod = Marshal.GetDelegateForFunctionPointer <_CallStaticMethodD>(_env->fTable->CallStaticObjectMethodA);
}