content: /*
   * Copyright 2021-2022 Alibaba Group Holding Ltd.
   *
   *    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.aliyun.fastmodel.core.tree.statement.script;
  
  import java.util.List;
  
  import com.aliyun.fastmodel.core.tree.AbstractNode;
  import com.aliyun.fastmodel.core.tree.Comment;
  import com.aliyun.fastmodel.core.tree.Node;
  import com.aliyun.fastmodel.core.tree.QualifiedName;
  import com.aliyun.fastmodel.core.tree.expr.Identifier;
  import com.google.common.base.Preconditions;
  import com.google.common.collect.ImmutableList;
  import lombok.Getter;
  
  /**
   * ref object
   *
   * @author panguanjing
   * @date 2021/9/14
   */
  @Getter
  public class RefObject extends AbstractNode {
  
      private final QualifiedName mainName;
  
      private final List<Identifier> attrNameList;
  
      private final Comment comment;
  
      public RefObject(QualifiedName mainName, List<Identifier> attrNameList,
                       Comment comment) {
          Preconditions.checkNotNull(mainName, "tableName can't be null");
          this.mainName = mainName;
          this.attrNameList = attrNameList;
          this.comment = comment;
      }
  
      public String getCommentValue() {
          if (comment == null) {
              return null;
          }
          return comment.getComment();
      }
  
      @Override
      public List<? extends Node> getChildren() {
          ImmutableList.Builder<Node> builder = ImmutableList.builder();
          builder.add(mainName);
          if (attrNameList != null) {
              builder.addAll(attrNameList);
          }
          return builder.build();
      }
  }
  