/**
* Gets an Optional with or without a value of CVar argument at position
*
* @param cv
* @return Optional
*/
public T get <T>(CommandVariable cv, Class <T> itemType, int position)
{
if (cv.arguments[position] != itemType)
{
throw new ArgumentException(String.Format("CVar argument at position %d is not of class %s",
position, itemType.getName()));
}
if (!cVarMap.ContainsKey(cv))
{
return(Optional.empty());
}
var ret = (T)cVarMap.Get(cv)[position];
return(Optional.ofNullable(ret));
}
/**
* Tries to apply a CVar argument at position to the consuming function
* The magic is that you declare a lambda function or reference some method
* and the type of object will be automatically picked from what you hinted
* <p>
* i.e. (String s) -> System.out.println(s) will try to get string,
* (Object o) -> map.put(key, o) or o -> list.add(o.hashCode()) will try to get objects
* and you dont have to specify class
* <p>
* The drawback is the ClassCastException will be thrown if the value is neither
* what you expected, nor a subclass of it
*
* @param cv
* @param position
* @param action
* @return false if CVar is not passed as Command Line Argument or the consuming action is incompatible
*/
public bool with <T>(CommandVariable cv, int position, Consumer <T> action)
{
try
{
var mapped = cVarMap.Get(cv);
if (mapped == null)
{
return(false);
}
var item = (T)mapped[position];
action.accept(item);
return(true);
}
catch (Exception ex)
{
return(false);
}
}
/**
* Tries to replace the CVar argument if already present or add it along with CVar
*
* @param cv
* @param value
* @param position
* @return false if invalid position or value class
*/
public bool unknown <T>(CommandVariable cv, T value, int position)
{
if (position < 0 || position >= cv.arguments.Count)
{
return(false);
}
if (!cv.arguments[position].isInstance(value))
{
return(false);
}
cVarMap.compute(cv, (key, array)->{
if (array == null)
{
array = new Object[cv.arguments.Count];
}
array[position] = value;
return(array);
});
/**
* Checks that CVar of any type is passed as Command Line Argument
*
* @param cv
* @return boolean
*/
public bool specified(CommandVariable cv)
{
return(cVarMap.ContainsKey(cv));
}
/**
* Checks that CVar of any type is passed as Command Line Argument with proper value(s)
*
* @param cv
* @return boolean
*/
public bool present(CommandVariable cv)
{
return(cVarMap[cv] != null);
}
/**
* Checks that CVar of switch-type is passed as Command Line Argument
*
* @param cv
* @return boolean
*/
public bool Bool(CommandVariable cv)
{
return(cv.getType() == CommandVariable.Type.SWITCH && cVarMap.ContainsKey(cv));
}