code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.sdk.server.subscriptions;
  
  import java.util.Map;
  
  import com.google.common.collect.Maps;
  import org.eclipse.milo.opcua.sdk.server.items.BaseMonitoredItem;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
  
  public class TriggeringLinks {
  
      private final Map<UInteger, BaseMonitoredItem<?>> triggeredItems = Maps.newConcurrentMap();
  
      private final BaseMonitoredItem<?> triggeringItem;
  
      public TriggeringLinks(BaseMonitoredItem<?> triggeringItem) {
          this.triggeringItem = triggeringItem;
      }
  
      public BaseMonitoredItem<?> getTriggeringItem() {
          return triggeringItem;
      }
  
      public Map<UInteger, BaseMonitoredItem<?>> getTriggeredItems() {
          return triggeredItems;
      }
  
      public boolean isEmpty() {
          return triggeredItems.isEmpty();
      }
  
  }
  