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