How to use

FactoryComparator

in

org.geotools.factory

/**
 * Compares this factory with the specified object for equality.
 * The default implementation returns {@code true} if and only if:
 * <p>
 * <ul>
 *   <li>Both objects are of the exact same class
 *       (a <cite>is instance of</cite> relationship is not enough).</li>
 *   <li>{@linkplain #getImplementationHints implementation hints} are
 *       {@linkplain Map#equals equal}.</li>
 * </ul>
 * <p>
 * The requirement for the <cite>exact same class</cite> is needed for consistency with the
 * {@linkplain FactoryRegistry factory registry} working, since at most one instance of a given
 * class {@linkplain FactoryRegistry#getServiceProviderByClass) is allowed} in a registry.
 *
 * @since 2.3
 */
public final boolean equals(final Object object) {
  if (object == this) {
    return true;
  }
  if (object!=null && object.getClass().equals(getClass())) {
    final AbstractFactory that = (AbstractFactory) object;
    return this.priority == that.priority &&
        new FactoryComparator(this, that).compare(new HashSet());
  }
  return false;
}

if (this.priority == that.priority) {
  final Set<FactoryComparator> comparators = new HashSet<FactoryComparator>();
  return new FactoryComparator(this, that).compare(comparators);

/**
 * Returns {@code true} if {@code f1} and {@code f2} are equals.
 *
 * @param done An initially empty set. Used internally for preventing infinite recursivity.
 */
boolean compare(final Set<FactoryComparator> done) {
  if (done.add(this)) {
    final Map<RenderingHints.Key, ?> m1 = f1.getImplementationHints();
    final Map<RenderingHints.Key, ?> m2 = f2.getImplementationHints();
    if (m1.size() != m2.size()) {
      return false;
    }
    for (final Map.Entry<RenderingHints.Key, ?> entry : m1.entrySet()) {
      final Object key = entry.getKey();
      final Object v1  = entry.getValue();
      final Object v2  = m2.get(key);
      if (v1 == v2) continue;
      if (v1 instanceof Factory) {
        if (v2 == null || !v1.getClass().equals(v2.getClass()) ||
          !new FactoryComparator((Factory) v1, (Factory) v2).compare(done))
        {
          return false;
        }
      } else if (!Utilities.equals(v1, v2)) {
        return false;
      }
    }
  }
  return true;
}

if (v1 instanceof Factory) {
  if (v2 == null || !v1.getClass().equals(v2.getClass()) ||
    !new FactoryComparator((Factory) v1, (Factory) v2).compare(done))