/// <summary>
/// Java object method callers
/// </summary>
/// <typeparam name="T">expect return type</typeparam>
/// <param name="javaClass">Java class pointer</param>
/// <param name="javaObject">Java Object pointer</param>
/// <param name="methodName">Name of the method to call</param>
/// <param name="sig">Method's JNI signature</param>
/// <param name="param">Paramters of the method call</param>
/// <returns></returns>
public T CallMethod <T>(IntPtr javaClass, IntPtr javaObject, string methodName, string sig, params object[] param)
{
IntPtr methodId = env.GetMethodID(javaClass, methodName, sig);
try {
if (typeof(T) == typeof(byte))
{
// Call the byte method
byte res = env.CallByteMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(bool))
{
// Call the boolean method
bool res = env.CallBooleanMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
if (typeof(T) == typeof(char))
{
// Call the char method
char res = env.CallCharMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(short))
{
// Call the short method
short res = env.CallShortMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(int))
{
// Call the int method
int res = env.CallIntMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(long))
{
// Call the long method
long res = env.CallLongMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(float))
{
// Call the float method
float res = env.CallFloatMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
else if (typeof(T) == typeof(double))
{
// Call the double method
double res = env.CallDoubleMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res); // need to fix this
}
else if (typeof(T) == typeof(string))
{
// Call the string method
IntPtr jstr = env.CallObjectMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
string res = env.JStringToString(jstr);
env.DeleteLocalRef(jstr);
return((T)(object)res);
}
else if (typeof(T) == typeof(byte[]))
{
// Call the byte method
IntPtr jobj = env.CallStaticObjectMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
if (jobj == IntPtr.Zero)
{
return(default(T));
}
byte[] res = env.JStringToByte(jobj);
env.DeleteLocalRef(jobj);
return((T)(object)res);
}
else if (typeof(T) == typeof(string[]))
{
// Call the string array method
IntPtr jobj = env.CallObjectMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
if (jobj == IntPtr.Zero)
{
return(default(T));
}
IntPtr[] objArray = env.GetObjectArray(jobj);
string[] res = new string[objArray.Length];
for (int i = 0; i < objArray.Length; i++)
{
res[i] = env.JStringToString(objArray[i]);
}
env.DeleteLocalRef(jobj);
return((T)(object)res);
}
else if (typeof(T) == typeof(int[]))
{
// Call the int array method
IntPtr jobj = env.CallObjectMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
if (jobj == IntPtr.Zero)
{
return(default(T));
}
int[] res = env.GetIntArray(jobj);
env.DeleteLocalRef(jobj);
return((T)(object)res);
}
else if (typeof(T) == typeof(IntPtr))
{
// Call the object method and deal with whatever comes back in the call code
IntPtr res = env.CallObjectMethod(javaObject, methodId, ParseParameters(javaClass, sig, param));
return((T)(object)res);
}
return(default(T));
} catch {
throw new Exception(env.CatchJavaException());
}
}
