StaticListenerLookup.java

package sk.stuba.fiit.perconik.core.services.listeners;

import com.google.common.base.Supplier;

import sk.stuba.fiit.perconik.core.Listener;
import sk.stuba.fiit.perconik.utilities.reflect.accessor.DelayedLookup;

final class StaticListenerLookup<L extends Listener> implements Supplier<L> {
  private final DelayedLookup<L> lookup;

  private StaticListenerLookup(final DelayedLookup<L> lookup) {
    this.lookup = lookup;
  }

  static <L extends Listener> StaticListenerLookup<L> forClass(final Class<L> type) {
    DelayedLookup.Builder<L> builder = DelayedLookup.builder();

    builder.enumConstant(type, "INSTANCE");
    builder.enumConstant(type, "instance");
    builder.classMethod(type, type, "getInstance");
    builder.classConstant(type, type, "INSTANCE");
    builder.classConstant(type, type, "instance");
    builder.classConstructor(type);

    return new StaticListenerLookup<>(builder.build());
  }

  public L get() {
    return this.lookup.get();
  }
}