content: /*
   *
   *  Copyright (c) 2016. Rick Hightower, Geoff Chandler
   *
   *  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 io.advantageous.reakt.promise.impl;
  
  import io.advantageous.reakt.Invokable;
  import io.advantageous.reakt.promise.Promise;
  import io.advantageous.reakt.promise.PromiseHandler;
  
  public class AnyPromise extends BasePromise<Void> implements PromiseHandler<Void>, Invokable {
  
      private final Promise<?>[] promises;
      private boolean invoked;
  
      public AnyPromise(Promise<?>... promises) {
          this.promises = promises;
          PromiseUtil.any((Promise) this, (Promise<Void>[]) promises);
      }
  
  
      @Override
      public void invoke() {
          if (invoked) {
              throw new IllegalStateException("PromiseHandler can only be invoked once");
          }
          invoked = true;
          for (Promise<?> promise : promises) {
              if (!promise.asHandler().isInvokable()) {
                  throw new IllegalStateException("AnyPromise can only be invoked if all children are invokeable");
              }
              promise.invoke();
          }
      }
  
      @Override
      public boolean isInvokable() {
          return true;
      }
  }
  