package it.unimi.dsi.fastutil.longs;
import java.util.Comparator;
public final class LongComparators {
private LongComparators() {
}
protected static class NaturalImplicitComparator implements LongComparator, java.io.Serializable {
private static final long serialVersionUID = 1L;
@Override
public final int compare(final long a, final long b) {
return (Long.compare((a), (b)));
}
@Override
public LongComparator reversed() {
return OPPOSITE_COMPARATOR;
}
private Object readResolve() {
return NATURAL_COMPARATOR;
}
};
public static final LongComparator NATURAL_COMPARATOR = new NaturalImplicitComparator();
protected static class OppositeImplicitComparator implements LongComparator, java.io.Serializable {
private static final long serialVersionUID = 1L;
@Override
public final int compare(final long a, final long b) {
return -(Long.compare((a), (b)));
}
@Override
public LongComparator reversed() {
return NATURAL_COMPARATOR;
}
private Object readResolve() {
return OPPOSITE_COMPARATOR;
}
};
public static final LongComparator OPPOSITE_COMPARATOR = new OppositeImplicitComparator();
protected static class OppositeComparator implements LongComparator, java.io.Serializable {
private static final long serialVersionUID = 1L;
final LongComparator comparator;
protected OppositeComparator(final LongComparator c) {
comparator = c;
}
@Override
public final int compare(final long a, final long b) {
return comparator.compare(b, a);
}
@Override
public final LongComparator reversed() {
return comparator;
}
};
public static LongComparator oppositeComparator(final LongComparator c) {
if (c instanceof OppositeComparator)
return ((OppositeComparator) c).comparator;
return new OppositeComparator(c);
}
public static LongComparator asLongComparator(final Comparator<? super Long> c) {
if (c == null || c instanceof LongComparator)
return (LongComparator) c;
return new LongComparator() {
@Override
public int compare(long x, long y) {
return c.compare(Long.valueOf(x), Long.valueOf(y));
}
@SuppressWarnings("deprecation")
@Override
public int compare(Long x, Long y) {
return c.compare(x, y);
}
};
}
}