/*
    * 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.common.statement;
  
  import lombok.Getter;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.CommentSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.ParameterMarkerSegment;
  
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.LinkedHashSet;
  import java.util.LinkedList;
  
  /**
   * SQL statement abstract class.
   */
  @Getter
  public abstract class AbstractSQLStatement implements SQLStatement {
      
      private final Collection<ParameterMarkerSegment> parameterMarkerSegments = new LinkedHashSet<>();
      
      private final Collection<Integer> uniqueParameterIndexes = new HashSet<>();
      
      private final Collection<CommentSegment> commentSegments = new LinkedList<>();
      
      private final Collection<String> variableNames = new HashSet<>();
      
      @Override
      public int getParameterCount() {
          return uniqueParameterIndexes.size();
      }
      
      /**
       * Add parameter marker segment.
       * 
       * @param parameterMarkerSegments parameter marker segment collection
       */
      public void addParameterMarkerSegments(final Collection<ParameterMarkerSegment> parameterMarkerSegments) {
          for (ParameterMarkerSegment each : parameterMarkerSegments) {
              this.parameterMarkerSegments.add(each);
              uniqueParameterIndexes.add(each.getParameterIndex());
          }
      }
  }