throwing Exception having multiple arguments in constructor
hi,
I am trying to implement exception handling for a JAVA + C++ module.
In which C++ exception is caught by a Java module.
The c++ code is as follows,
try
{
///////////===========
} catch (Exception1 &e) {
jclass clazz = jenv->FindClass("test/Exception1Java");
if(clazz)
jenv->ThrowNew(clazz,e.getErrMsg().c_str());
return 0;
} catch (Exception2 &e) {
jclass clazz = jenv->FindClass("test/Exception2");
if(clazz)
jenv->ThrowNew(clazz,e.getErrMsg().c_str());
return 0;
}
This works perfectly fine.
But I want to pass one more argument as int while throwing the java exception.
jenv->ThrowNew(clazz,e.getErrId(),e.getErrMsg().c_str());
As the jenv->ThrowNew function only take two arguments I am unable to send the error id( int ) to the message.
Is there any alternate to this function or some other approach to throw the java exceptions.
[1004 byte] By [
jsp_proa] at [2007-11-26 22:46:48]
# 1
> hi,
> I am trying to implement exception handling for a
> JAVA + C++ module.
> In which C++ exception is caught by a Java module.
>
> The c++ code is as follows,
<snip>
>
> But I want to pass one more argument as int while
> throwing the java exception.
>
>
> env->ThrowNew(clazz,e.getErrId(),e.getErrMsg().c_str());
>
> As the jenv->ThrowNew function only take two
> arguments I am unable to send the error id( int ) to
> the message.
>
> Is there any alternate to this function or some other
> approach to throw the java exceptions.
Build the exception using the normal FindClass, GetMethodID approach,. and then throw it.
#include "NativeExceptionTest.h"
JNIEXPORT void JNICALL Java_NativeExceptionTest_test
(JNIEnv *env, jobject obj, jint data) {
if (data == 42) {
jclass excClass = env->FindClass("MyException");
if (!excClass) {
return;
}
jmethodID ctorID = env->GetMethodID(excClass, "<init>", "(ILjava/lang/String;)V");
if (!ctorID) {
return;
}
jstring excMessage = env->NewStringUTF("ILLEGAL VALUE");
jobject excObject = env->NewObject(excClass, ctorID,-1,excMessage);
if (!excObject) {
return;
}
env->Throw((jthrowable)excObject);
}
return;
}
============================================
public class NativeExceptionTest {
static {
System.loadLibrary("nativeException");
}
NativeExceptionTest() {
try {
test(42);
} catch (MyException e) {
System.out.println("Exception: " + e.getCode() + "(" + e.getMessage() +")");
}
}
private native void test(int i) throws MyException;
public static void main(String[] args) {
new NativeExceptionTest();
}
}
class MyException extends Exception {
private int code;
MyException(int code, String message) {
super(message);
this.code = code;
}
int getCode() {
return this.code;
}
}
