marcel.lang.primitives.collections.sets.AbstractCharSet Maven / Gradle / Ivy
package marcel.lang.primitives.collections.sets;
import marcel.lang.primitives.collections.AbstractCharCollection;
import marcel.lang.primitives.iterators.CharIterator;
import java.util.Set;
public abstract class AbstractCharSet extends AbstractCharCollection implements Cloneable, CharSet {
protected AbstractCharSet() {}
@Override
public abstract CharIterator iterator();
@Override
public boolean equals(final Object o) {
if (o == this) return true;
if (!(o instanceof Set)) return false;
Set s = (Set) o;
if (s.size() != size()) return false;
if (s instanceof CharSet) {
return containsAll((CharSet) s);
}
return containsAll(s);
}
/** Returns a hash code for this set.
*
* The hash code of a set is computed by summing the hash codes of
* its elements.
*
* @return a hash code for this set.
*/
@Override
public int hashCode() {
int h = 0, n = size();
CharIterator i = iterator();
char k;
while(n-- != 0) {
k = i.nextChar(); // We need k because KEY2JAVAHASH() is a macro with repeated evaluation.
h += (k);
}
return h;
}
}