/*
* Returns a human-readable summary of an exception object. The buffer will
* be populated with the "binary" class name and, if present, the
* exception message.
*/
static bool getExceptionSummary(C_JNIEnv* env, jthrowable exception, std::string& result) {
JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
/* get the name of the exception's class */
scoped_local_ref<jclass> exceptionClass(env, (*env)->GetObjectClass(e, exception)); // can't fail
scoped_local_ref<jclass> classClass(env,
(*env)->GetObjectClass(e, exceptionClass.get())); // java.lang.Class, can't fail
jmethodID classGetNameMethod =
(*env)->GetMethodID(e, classClass.get(), "getName", "()Ljava/lang/String;");
scoped_local_ref<jstring> classNameStr(env,
(jstring) (*env)->CallObjectMethod(e, exceptionClass.get(), classGetNameMethod));
if (classNameStr.get() == NULL) {
(*env)->ExceptionClear(e);
result = "<error getting class name>";
return false;
}
const char* classNameChars = (*env)->GetStringUTFChars(e, classNameStr.get(), NULL);
if (classNameChars == NULL) {
(*env)->ExceptionClear(e);
result = "<error getting class name UTF-8>";
return false;
}
result += classNameChars;
(*env)->ReleaseStringUTFChars(e, classNameStr.get(), classNameChars);
/* if the exception has a detail message, get that */
jmethodID getMessage =
(*env)->GetMethodID(e, exceptionClass.get(), "getMessage", "()Ljava/lang/String;");
scoped_local_ref<jstring> messageStr(env,
(jstring) (*env)->CallObjectMethod(e, exception, getMessage));
if (messageStr.get() == NULL) {
return true;
}
result += ": ";
const char* messageChars = (*env)->GetStringUTFChars(e, messageStr.get(), NULL);
if (messageChars != NULL) {
result += messageChars;
(*env)->ReleaseStringUTFChars(e, messageStr.get(), messageChars);
} else {
result += "<error getting message>";
(*env)->ExceptionClear(e); // clear OOM
}
return true;
}
/*
* Returns a human-readable summary of an exception object. The buffer will
* be populated with the "binary" class name and, if present, the
* exception message.
*/
static char* getExceptionSummary0(C_JNIEnv* env, jthrowable exception) {
JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
/* get the name of the exception's class */
scoped_local_ref<jclass> exceptionClass(env,
(*env)->GetObjectClass(e, exception)); // can't fail
scoped_local_ref<jclass> classClass(env,
(*env)->GetObjectClass(e, exceptionClass.get())); // java.lang.Class, can't fail
jmethodID classGetNameMethod = (*env)->GetMethodID(e, classClass.get(),
"getName", "()Ljava/lang/String;");
scoped_local_ref<jstring> classNameStr(env,
(jstring) (*env)->CallObjectMethod(e, exceptionClass.get(),
classGetNameMethod));
if (classNameStr.get() == NULL) {
return NULL;
}
/* get printable string */
const char* classNameChars = (*env)->GetStringUTFChars(e,
classNameStr.get(), NULL);
if (classNameChars == NULL) {
return NULL;
}
/* if the exception has a detail message, get that */
jmethodID getMessage = (*env)->GetMethodID(e, exceptionClass.get(),
"getMessage", "()Ljava/lang/String;");
scoped_local_ref<jstring> messageStr(env,
(jstring) (*env)->CallObjectMethod(e, exception, getMessage));
if (messageStr.get() == NULL) {
return strdup(classNameChars);
}
char* result = NULL;
const char* messageChars = (*env)->GetStringUTFChars(e, messageStr.get(),
NULL);
if (messageChars != NULL) {
asprintf(&result, "%s: %s", classNameChars, messageChars);
(*env)->ReleaseStringUTFChars(e, messageStr.get(), messageChars);
} else {
(*env)->ExceptionClear(e); // clear OOM
asprintf(&result, "%s: <error getting message>", classNameChars);
}
(*env)->ReleaseStringUTFChars(e, classNameStr.get(), classNameChars);
return result;
}
