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.impexp;
  
  import java.util.List;
  
  import com.aliyun.fastmodel.core.tree.Node;
  import com.aliyun.fastmodel.core.tree.expr.BaseExpression;
  import com.aliyun.fastmodel.core.tree.expr.Identifier;
  import com.aliyun.fastmodel.core.tree.expr.literal.StringLiteral;
  import com.aliyun.fastmodel.core.tree.statement.BaseQueryStatement;
  import com.aliyun.fastmodel.core.tree.statement.constants.StatementType;
  import com.google.common.collect.ImmutableList;
  import lombok.Getter;
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * export statement
   * export output=a.txt where domain='cn';
   *
   * @author panguanjing
   * @date 2021/8/20
   */
  @Getter
  public class ExportStatement extends BaseQueryStatement {
  
      private final StringLiteral output;
  
      private final BaseExpression where;
  
      private final StringLiteral target;
  
      public ExportStatement(Identifier baseUnit, StringLiteral output,
                             StringLiteral target, BaseExpression where) {
          super(baseUnit);
          this.output = output;
          this.target = target;
          this.where = where;
          setStatementType(StatementType.EXPORT);
      }
  
      public String getOutputValue() {
          if (output != null) {
              return output.getValue();
          }
          return StringUtils.EMPTY;
      }
  
      public String getTargetValue() {
          if (target != null) {
              return target.getValue();
          }
          return StringUtils.EMPTY;
      }
  
      @Override
      public List<? extends Node> getChildren() {
          return ImmutableList.of(output, where);
      }
  }
  