/*
    * 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.shardingsphere.sql.parser.sql.dialect.statement.sqlserver.dml;
  
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.ddl.index.IndexSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.OutputSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.WithSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.statement.dml.MergeStatement;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.sqlserver.hint.OptionHintSegment;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.sqlserver.hint.WithTableHintSegment;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.sqlserver.merge.MergeWhenAndThenSegment;
  import org.apache.shardingsphere.sql.parser.sql.dialect.statement.sqlserver.SQLServerStatement;
  
  import java.util.Collection;
  import java.util.LinkedList;
  import java.util.Optional;
  
  /**
   * SQLServer merge statement.
   */
  @Setter
  @Getter
  public final class SQLServerMergeStatement extends MergeStatement implements SQLServerStatement {
      
      private WithSegment withSegment;
      
      private WithTableHintSegment withTableHintSegment;
      
      private Collection<IndexSegment> indexes = new LinkedList<>();
      
      private OutputSegment outputSegment;
      
      private OptionHintSegment optionHintSegment;
      
      private Collection<MergeWhenAndThenSegment> whenAndThenSegments = new LinkedList<>();
      
      /**
       * Get with segment.
       *
       * @return with segment.
       */
      public Optional<WithSegment> getWithSegment() {
          return Optional.ofNullable(withSegment);
      }
      
      /**
       * Get with table hint segment.
       *
       * @return with table hint segment.
       */
      public Optional<WithTableHintSegment> getWithTableHintSegment() {
          return Optional.ofNullable(withTableHintSegment);
      }
      
      /**
       * Get output segment.
       *
       * @return output segment.
       */
      public Optional<OutputSegment> getOutputSegment() {
          return Optional.ofNullable(outputSegment);
      }
      
      /**
       * Get option hint segment.
       *
       * @return option hint segment.
       */
      public Optional<OptionHintSegment> getOptionHintSegment() {
          return Optional.ofNullable(optionHintSegment);
      }
  }