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exceptionHandling.cpp
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120 lines (109 loc) · 2.84 KB
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/*
* exceptionHandling.cpp
*
* Created on: 6 oct. 2013
* Author: Loic Oudot
*/
#include <iostream>
#include <stdexcept>
#include "java4cpp/java_classes.h"
#include "exceptionHandling.h"
using namespace java4cpp::demos;
void allExceptionHandling()
{
std::cout << "================================" << std::endl;
std::cout << "Exception Handling" << std::endl;
std::cout << "================================" << std::endl;
nullInstance();
nullPointerException();
uncheckedException();
checkedException();
customCheckedException();
customUncheckedException();
badCastException();
}
/**
* Handling of Null instance
*/
void nullInstance() {
// Create a null instance
ExceptionClass nullInstance((jobject)NULL);
try {
std::cout << "Is null instance: " << (nullInstance.getJavaObject() == NULL) << std::endl;
nullInstance.someMethod();
} catch (std::exception& e) {
std::cout << "Calling method on null instance: " << e.what() << std::endl;
}
// Receiving a null instance
nullInstance = ExceptionClass::getNullInstance();
try {
std::cout << "Is null instance: " << (nullInstance.getJavaObject() == NULL) << std::endl;
nullInstance.someMethod();
} catch (std::exception& e) {
std::cout << "Calling method on null instance: " << e.what() << std::endl;
}
}
/**
* Handling NullPointerException inside Java class
*/
void nullPointerException()
{
try {
ExceptionClass::generateNullPointerException();
} catch (std::exception& e) {
std::cout << "Method generating NullPointerException: " << e.what() << std::endl;
}
}
/**
* Handling unchecked exception inside Java class
*/
void uncheckedException()
{
try {
ExceptionClass::generateUncheckedException();
} catch (std::exception& e) {
std::cout << "Method generating unchecked exception: " << e.what() << std::endl;
}
}
/**
* Handling checked exception inside Java class
*/
void checkedException()
{
try {
ExceptionClass::generateCheckedException();
} catch (std::exception& e) {
std::cout << "Method generating checked exception: " << e.what() << std::endl;
}
}
/**
* Handling custom checked exception inside Java class
*/
void customCheckedException()
{
try {
ExceptionClass::generateCustomCheckedException();
} catch (java4cpp::demos::CheckedException& e) {
std::cout << "Method generating custom checked exception: " << e.what() << std::endl;
}
}
/**
* Handling custom unchecked exception inside Java class
*/
void customUncheckedException()
{
try {
ExceptionClass::generateCustomUncheckedException();
} catch (java4cpp::demos::UncheckedException& e) {
std::cout << "Method generating custom unchecked exception: " << e.what() << std::endl;
}
}
void badCastException()
{
ExceptionClass aClass;
try {
UncheckedException incompatibleClass(aClass.getJavaObject());
} catch(std::exception& e) {
std::cout << "Bad cast exception: " << e.what() << std::endl;
}
}