content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.bifromq.basecrdt.core.internal;
  
  import org.apache.bifromq.basecrdt.core.api.DWFlagOperation;
  import org.apache.bifromq.basecrdt.core.api.IDWFlag;
  import org.apache.bifromq.basecrdt.proto.Replica;
  import org.apache.bifromq.basecrdt.proto.StateLattice;
  
  class DWFlag extends CausalCRDT<IDotSet, DWFlagOperation> implements IDWFlag {
      private volatile boolean flag;
  
      DWFlag(Replica replica, DotStoreAccessor<IDotSet> dotStoreAccessor,
             CRDTOperationExecutor<DWFlagOperation> executor) {
          super(replica, dotStoreAccessor, executor);
          refresh();
      }
  
      @Override
      public boolean read() {
          return flag;
      }
  
      @Override
      protected void handleInflation(Iterable<StateLattice> addEvents, Iterable<StateLattice> removeEvents) {
          refresh();
      }
  
      private void refresh() {
          flag = dotStoreAccessor.fetch().isBottom();
      }
  }
  