public void LoadVM(Dictionary <string, string> options)
{
string currentDir = Directory.GetCurrentDirectory();
string jvmDll = Path.Combine("jre", "bin", "server", "jvm.dll");
if ((!File.Exists(jvmDll)))
{
throw new Exception("Error determining the location of the Java Runtime Environment");
}
// Set the directory to the location of the JVM.dll.
// This will ensure that the API call JNI_CreateJavaVM will work
Directory.SetCurrentDirectory(Path.GetDirectoryName(jvmDll));
var args = new JavaVMInitArgs();
args.version = JNIVersion.JNI_VERSION_10;
args.ignoreUnrecognized = JavaVM.BooleanToByte(true); // True
if (options.Count > 0)
{
args.nOptions = options.Count;
var opt = new JavaVMOption[options.Count];
int i = 0;
foreach (KeyValuePair <string, string> kvp in options)
{
opt[i++].optionString = Marshal.StringToHGlobalAnsi(kvp.Key.ToString() + "=" + kvp.Value.ToString());
}
fixed(JavaVMOption *a = &opt[0])
{
// prevents the garbage collector from relocating the opt variable as this is used in unmanaged code that the gc does not know about
args.options = a;
}
}
var result = JavaVM.JNI_CreateJavaVM(out IntPtr javaVirtualMachine, out IntPtr environment, &args);
if (result != JNIReturnValue.JNI_OK)
{
throw new Exception("Cannot create JVM " + result.ToString());
}
jvm = new JavaVM(javaVirtualMachine);
env = new JNIEnv(environment);
Directory.SetCurrentDirectory(currentDir);
}
public void LoadVM(Dictionary <string, string> options, bool AddToExistingJVM)
{
// Get the location of the current version of the JVM.dll
string jreVersion = (string)Registry.GetValue(JRE_REGISTRY_KEY, "CurrentVersion", null);
string keyName = Path.Combine(JRE_REGISTRY_KEY, jreVersion);
string jvmDir = (string)Registry.GetValue(keyName, "RuntimeLib", null);
if ((jvmDir.Length == 0) || (!File.Exists(jvmDir)))
{
throw new Exception("Error determining the location of the Java Runtime Environment");
}
// Set the directory to the location of the JVM.dll.
// This will ensure that the API call JNI_CreateJavaVM will work
Directory.SetCurrentDirectory(Path.GetDirectoryName(jvmDir));
var args = new JavaVMInitArgs();
switch (Convert.ToInt32((decimal.Parse(jreVersion.Substring(0, 3)) - 1) / 2 * 10))
{
case 0:
throw new Exception("Unsupported java version. Please upgrade your version of the JRE.");
case 1:
args.version = JNIVersion.JNI_VERSION_1_2;
break;
case 2:
args.version = JNIVersion.JNI_VERSION_1_4;
break;
default:
args.version = JNIVersion.JNI_VERSION_1_6;
break;
}
args.ignoreUnrecognized = JavaVM.BooleanToByte(true); // True
if (options.Count > 0)
{
args.nOptions = options.Count;
var opt = new JavaVMOption[options.Count];
int i = 0;
foreach (KeyValuePair <string, string> kvp in options)
{
opt[i++].optionString = Marshal.StringToHGlobalAnsi(kvp.Key.ToString() + "=" + kvp.Value.ToString());
}
fixed(JavaVMOption *a = &opt[0])
{
// prevents the garbage collector from relocating the opt variable as this is used in unmanaged code that the gc does not know about
args.options = a;
}
}
if (!AttachToCurrentJVMThread)
{
IntPtr environment;
IntPtr javaVirtualMachine;
int result = JavaVM.JNI_CreateJavaVM(out javaVirtualMachine, out environment, &args);
if (result != JNIReturnValue.JNI_OK)
{
throw new Exception("Cannot create JVM " + result.ToString());
}
jvm = new JavaVM(javaVirtualMachine);
env = new JNIEnv(environment);
}
else
{
AttachToCurrentJVM(args);
}
}