content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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 com.tencent.angel.ps.storage.vector.storage;
  
  import com.tencent.angel.ps.storage.vector.element.IElement;
  import com.tencent.angel.ps.storage.vector.op.IStringElementOp;
  import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
  import it.unimi.dsi.fastutil.objects.ObjectIterator;
  
  /**
   * Base class for String key complex value storage
   */
  public abstract class StringElementStorage extends ObjectTypeStorage implements IStringElementOp {
  
      public StringElementStorage(Class<? extends IElement> objectClass, long indexOffset) {
          super(objectClass, indexOffset);
          this.objectClass = objectClass;
      }
  
      public StringElementStorage() {
          this(null, 0L);
      }
  
      abstract public ObjectIterator<Object2ObjectMap.Entry<String, IElement>> iterator();
  }