package speiger.src.collections.PACKAGE.sets;

#if TYPE_OBJECT
import java.util.Objects;
#endif
import java.util.Set;

import speiger.src.collections.PACKAGE.collections.ABSTRACT_COLLECTION;
import speiger.src.collections.PACKAGE.collections.ITERATOR;

/**
 * Abstract Type Specific Set that reduces boxing/unboxing
 * @Type(T)
 */
public abstract class ABSTRACT_SET KEY_GENERIC_TYPE extends ABSTRACT_COLLECTION KEY_GENERIC_TYPE implements SET KEY_GENERIC_TYPE
{
#if TYPE_OBJECT
	@Override
	public KEY_TYPE addOrGet(KEY_TYPE o) { throw new UnsupportedOperationException(); }
	
#endif
	@Override
	public abstract ITERATOR KEY_GENERIC_TYPE iterator();
	@Override
	public ABSTRACT_SET KEY_GENERIC_TYPE copy() { throw new UnsupportedOperationException(); }
	
	@Override
	public int hashCode() {
		int hashCode = 0;
		ITERATOR KEY_GENERIC_TYPE i = iterator();
		while(i.hasNext())
			hashCode += KEY_TO_HASH(i.NEXT());
		return hashCode;
	}
	
	@Override
	public boolean equals(Object o) {
		if (o == this)
			return true;
		if (!(o instanceof Set))
			return false;
		Set<?> l = (Set<?>)o;
		if(l.size() != size()) return false;
		try {
			return containsAll(l);
		} catch (ClassCastException | NullPointerException unused) {
			return false;
		}
	}
}