code: /*
   * 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.skywalking.oap.server.core.query.type;
  
  import io.vavr.collection.Stream;
  import io.vavr.control.Option;
  import java.util.ArrayList;
  import java.util.List;
  import lombok.Getter;
  
  public class IntValues {
      @Getter
      private List<KVInt> values = new ArrayList<>();
  
      public void addKVInt(KVInt e) {
          values.add(e);
      }
  
      /**
       * Return defaultValue if absent.
       */
      public KVInt findValue(String id, int defaultValue) {
          for (KVInt value : values) {
              if (value.getId().equals(id)) {
                  return value;
              }
          }
  
          return new KVInt(id, defaultValue, true);
      }
  
      public NullableValue latestValue(int defaultValue) {
          Option<KVInt> kvInt = Stream.ofAll(values).findLast(v -> !v.isEmptyValue());
          if (kvInt.isEmpty()) {
              return new NullableValue(defaultValue, true);
          } else {
              return new NullableValue(kvInt.get().getValue(), kvInt.get().isEmptyValue());
          }
      }
  }
  