checkGuard class
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class Guard{
public:
/// <summary>
/// Checks that the index is within range, if not it throws an exception.
/// </summary>
/// <param name="index">The ordinal position (index) of the item.</param>
/// <param name="count">The number of items in the collection.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the index is out of range.</exception>
static void CheckIndex(int index, int count, const std::string & message="Index out of range error."){
if(index>=count||index<0){
throw DataException(message);
}
}
/// <summary>
/// Checks that the condition is true, if not it throws an exception.
/// </summary>
/// <param name="condition">The condition to assert.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the condition is false.</exception>
static void CheckTrue(bool condition, const std::string & message="Failed assertion error."){
if(!condition){
throw DataException(message);
}
}
/// <summary>
/// Checkes that the condition is false, if not it throws an exception.
/// </summary>
/// <param name="condition">The condition to assert.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Throw when the condition is true.</exception>
static void CheckNotTrue(bool condition, const std::string & message="Failed assertion error."){
if(condition){
throw DataException(message);
}
}
/// <summary>
/// Checks that a pointer is not null, otherwise it will throw an exception.
/// </summary>
/// <param name="p">The pointer to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the pointer is NULL.</exception>
static void CheckNull(void * p, const std::string & message="Missing value error: pointer is NULL."){
if(p==NULL){
throw DataException(message);
}
}
/// <summary>
/// Checks that the string is not empty or only contains whitespace
/// </summary>
/// <param name="value">The string to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the string is empty or only contains whitespace.</exception>
static void NotEmptyOrWhitespace(const std::string & value, const std::string & message="String is empty or only whitespace error."){
if(value.length()==0 || StringHelper::Trim(value).length()==0){
throw DataException(message);
}
}
/// <summary>
/// Checks that the string is not empty or only contains whitespace
/// </summary>
/// <param name="value">The string to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the string is empty or only contains whitespace.</exception>
static void NotEmptyOrWhitespace(const std::wstring & value, const std::string & message="String is empty or only whitespace error."){
if(value.length()==0 || StringHelper::Trim(value).length()==0){
throw DataException(message);
}
}
/// <summary>
/// Checks that the string is not empty.
/// </summary>
/// <param name="value">The string to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the string is empty.</exception>
static void NotEmpty(const std::string & value, const std::string & message="String is empty error."){
if(value.length()==0){
throw DataException(message);
}
}
/// <summary>
/// Checks that the string is not empty.
/// </summary>
/// <param name="value">The string to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the string is empty.</exception>
static void NotEmpty(const std::wstring & value, const std::string & message="String is empty error."){
if(value.length()==0){
throw DataException(message);
}
}
/// <summary>
/// Checks that a collection is not empty.
/// </summary>
/// <param name="count">The number of items in the collection.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the collection is empty.</exception>
static void NotEmpty(int count, const std::string & message="Collection is empty error."){
if(count<1){
throw DataException(message);
}
}
/// <summary>
/// Checks that a character is not empty.
/// </summary>
/// <param name="ch">The character to check.</param>
/// <param name="message">The exception message to throw.</param>
/// <exception cref="DataException">Thrown when the character is empty.</exception>
static void NotEmpty(const char ch, const std::string & message="Character is empty error."){
if(ch==NULL){
throw DataException(message);
}
}
};
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