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Dependency for the MultiMachineBuilder, a voxel game about building an industrial empire in a finite world.
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/**
*
*/
package mmb.engine;
import java.util.function.Consumer;
import java.util.function.Supplier;
import mmb.NN;
/**
* @author oskar
*
*/
public class MMBUtils {
private MMBUtils() {}
//Casting
/**
* Switches displayed class types. The types should be variant of the same class type
* @param dest type
* @param cls class to cast
* @return a casted class
*/
@SuppressWarnings("unchecked")
@NN public static Class classcast(Class> cls){
return (Class) cls;
}
/**
* WARNING: THIS METHOD IS UNSAFE AND MISUSE WILL RESULT IN HARD TO TRACE CASTING BUGS, so the name is very long
* @param in input
* @param source type
* @param destination type
* @return the same object (but it might fail)
* @throws ClassCastException randomly, when misused in various methods
*/
@SuppressWarnings("unchecked")
public static U thisIsAReallyLongNameUnsafeCast(T in) {
return (U) in;
}
/**
* WARNING: THIS METHOD IS UNSAFE AND MISUSE WILL RESULT IN HARD TO TRACE CASTING BUGS, so the name is very long
* @param in input
* @param source type
* @param destination type
* @return the same object (but it might fail)
* @throws ClassCastException randomly, when misused in various methods
*/
@SuppressWarnings("unchecked")
@NN public static U thisIsAReallyLongNameUnsafeCastNN(T in) {
return (U) in;
}
//Boolean to value
/**
* Bool-to-int conversion
* @param bool value to convert
* @return an integer representation of a boolean
*/
public static int bool2int(boolean bool) {
return bool ? 1 : 0;
}
//Lambda expressions
@NN private static final Consumer> nothing = v -> {};
/**
* @param type of the input
* @return a consumer which does nothing.
* @apiNote The returned consumers are the same object
*/
@SuppressWarnings("unchecked")
@NN public static Consumer doNothing(){
return (Consumer) nothing;
}
/**
* Creates a {@link Runnable} which invokes the {@code action} with {@code value}
* @param the data type
* @param action consumer to insert into
* @param value value to insert
* @return the runnable object
*/
public static Runnable loadValue(Consumer action, T value) {
return () -> action.accept(value);
}
/**
* @param type of values
* @param sup
* @return a lazily evaluated supplier
*/
public static Supplier lazy(Supplier sup){
return new Supplier<>() {
boolean isValid;
T value;
@Override
public T get() {
if(!isValid) {
value = sup.get();
isValid = true;
}
return value;
}
};
}
//Undeclared throws
/**s
* Throws given exception without a declaration
* @param t the exception to throw
*/
public static void shoot(Throwable t) {
MMBUtils.shoot0(t);
}
@SuppressWarnings("unchecked")
private static void shoot0(Throwable e) throws T {
throw (T) e;
}
}