/*
 * Copyright (C) 2012 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.jboss.errai.ioc.client.container.async;

import org.jboss.errai.common.client.util.CreationalCallback;

/**
 * @author Mike Brock
 */
public class AsyncBeanFuture<T> {
  private T value;
  private CreationalCallback<T> creationalCallback;

  public AsyncBeanFuture(final CreationalCallback<T> creationalCallback) {
    this.creationalCallback = new CreationalCallback<T>() {
      @Override
      public void callback(final T beanInstance) {
        value = beanInstance;
        if (creationalCallback != null) {
          creationalCallback.callback(beanInstance);
        }
      }
    };
  }

  public T get() {
    if (value == null) {
      throw new AsyncBeanNotLoaded();
    }
    return value;
  }

  public boolean isLoaded() {
    return value != null;
  }

  public CreationalCallback<T> getCreationalCallback() {
    return creationalCallback;
  }
}
