content: /*
   *
   *  * Copyright 2020 Alibaba Group Holding Limited.
   *  *
   *  * 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 com.alibaba.graphscope.common.ir.rel.type;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  public class JoinVertexEntry<T> {
      private final T vertex;
      private @Nullable final String keyName;
  
      public JoinVertexEntry(T vertex, @Nullable String keyName) {
          this.vertex = vertex;
          this.keyName = keyName;
      }
  
      public T getVertex() {
          return vertex;
      }
  
      public @Nullable String getKeyName() {
          return keyName;
      }
  }
  