org.nasdanika.common.AbstractSplitJoinSet Maven / Gradle / Ivy
package org.nasdanika.common;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;
public abstract class AbstractSplitJoinSet extends AbstractSplitJoinCollection implements Set {
@Override
public boolean add(E e) {
if (contains(e)) {
return false;
}
return super.add(e);
}
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof Set)) {
return false;
}
Set s = (Set) o;
return s.size() == size() && containsAll(s);
}
public int hashCode() {
int ret = 0;
for (E e: this) {
if (e != null) {
ret ^= e.hashCode();
}
}
return ret;
}
public boolean removeAll(Collection c) {
if (c == null) {
return false;
}
boolean ret = false;
if (size() < c.size()) {
Iterator i = iterator();
while (i.hasNext()) {
if (c.contains(i.next())) {
i.remove();
ret = true;
}
}
} else {
for (Object e : c) {
ret = remove(e) | ret;
}
}
return ret;
}
}