/** Converts a {@link Map} of integers to a {@link TargetMapping}. */
public static TargetMapping target(Map<Integer, Integer> map, int sourceCount, int targetCount) {
final PartialFunctionImpl mapping =
new PartialFunctionImpl(sourceCount, targetCount, MappingType.FUNCTION);
for (Map.Entry<Integer, Integer> entry : map.entrySet()) {
mapping.set(entry.getKey(), entry.getValue());
}
return mapping;
}
@SuppressWarnings("unchecked")
private static <K, V> HashMap<K, V> copy(Map<K, V> map) {
HashMap<K, V> copy = new HashMap<K, V>();
for (Iterator<Map.Entry<K, V>> i = map.entrySet().iterator(); i.hasNext(); ) {
Map.Entry<K, V> e = i.next();
if (e.getValue() instanceof Set) {
copy.put(e.getKey(), (V) copy((Set) e.getValue()));
} else {
copy.put(e.getKey(), e.getValue());
}
}
return copy;
}
