content: /*
   * Copyright 1999-2023 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.alibaba.nacos.plugin.auth.impl.persistence.handler.support;
  
  import com.alibaba.nacos.persistence.constants.PersistenceConstant;
  import com.alibaba.nacos.plugin.auth.impl.constant.AuthPageConstant;
  import com.alibaba.nacos.plugin.auth.impl.model.OffsetFetchResult;
  import com.alibaba.nacos.plugin.auth.impl.persistence.handler.PageHandlerAdapter;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * derby page handler adapter.
   *
   * @author huangKeMing
   */
  public class DerbyPageHandlerAdapter implements PageHandlerAdapter {
      
      @Override
      public boolean supports(String dataSourceType) {
          return PersistenceConstant.DERBY.equals(dataSourceType);
      }
      
      @Override
      public OffsetFetchResult addOffsetAndFetchNext(String fetchSql, Object[] arg, int pageNo, int pageSize) {
          if (!fetchSql.contains(AuthPageConstant.OFFSET)) {
              fetchSql += " " + AuthPageConstant.OFFSET_ROWS + " " + AuthPageConstant.FETCH_NEXT;
              
              List<Object> newArgsList = new ArrayList<>(Arrays.asList(arg));
              newArgsList.add((pageNo - 1) * pageSize);
              newArgsList.add(pageSize);
              
              Object[] newArgs = newArgsList.toArray(new Object[newArgsList.size()]);
              
              return new OffsetFetchResult(fetchSql, newArgs);
          }
          
          return new OffsetFetchResult(fetchSql, arg);
      }
      
  }
  