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/*
 * Copyright (C) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package shaded.shaded.com.google.inject.internal;

import shaded.shaded.com.google.common.collect.Lists;
import java.util.List;

/**
 * Keeps track of creation listeners & uninitialized bindings, so they can be processed after
 * bindings are recorded.
 *
 * @author [email protected] (Sam Berlin)
 */
class ProcessedBindingData {

  private final List creationListeners = Lists.newArrayList();
  private final List uninitializedBindings = Lists.newArrayList();
  private final List delayedUninitializedBindings = Lists.newArrayList();

  void addCreationListener(CreationListener listener) {
    creationListeners.add(listener);
  }

  void addUninitializedBinding(Runnable runnable) {
    uninitializedBindings.add(runnable);
  }

  void addDelayedUninitializedBinding(Runnable runnable) {
    delayedUninitializedBindings.add(runnable);
  }

  /** Initialize bindings. This may be done eagerly */
  void initializeBindings() {
    for (Runnable initializer : uninitializedBindings) {
      initializer.run();
    }
  }

  /**
   * Runs creation listeners.
   *
   * TODO(lukes): figure out exactly why this case exists.
   */
  void runCreationListeners(Errors errors) {
    for (CreationListener creationListener : creationListeners) {
      creationListener.notify(errors);
    }
  }

  /**
   * Initialized bindings that need to be delayed until after all injection points and other
   * bindings are processed. The main current usecase for this is resolving Optional dependencies
   * for OptionalBinder bindings.
   */
  void initializeDelayedBindings() {
    for (Runnable initializer : delayedUninitializedBindings) {
      initializer.run();
    }
  }
}