content: /*
   * Copyright 1999-2012 Alibaba Group.
   *  
   * 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.
   */
  /**
   * (created at 2012-2-15)
   */
  package com.alibaba.cobar.server.response;
  
  import java.nio.ByteBuffer;
  
  import com.alibaba.cobar.config.Fields;
  import com.alibaba.cobar.mysql.PacketUtil;
  import com.alibaba.cobar.net.mysql.EOFPacket;
  import com.alibaba.cobar.net.mysql.FieldPacket;
  import com.alibaba.cobar.net.mysql.ResultSetHeaderPacket;
  import com.alibaba.cobar.net.mysql.RowDataPacket;
  import com.alibaba.cobar.parser.util.ParseUtil;
  import com.alibaba.cobar.server.ServerConnection;
  import com.alibaba.cobar.util.LongUtil;
  
  /**
   * @author <a href="mailto:shuo.qius@alibaba-inc.com">QIU Shuo</a>
   */
  public class SelectIdentity {
  
      private static final int FIELD_COUNT = 1;
      private static final ResultSetHeaderPacket header = PacketUtil.getHeader(FIELD_COUNT);
      static {
          byte packetId = 0;
          header.packetId = ++packetId;
      }
  
      public static void response(ServerConnection c, String stmt, int aliasIndex, final String orgName) {
          String alias = ParseUtil.parseAlias(stmt, aliasIndex);
          if (alias == null) {
              alias = orgName;
          }
  
          ByteBuffer buffer = c.allocate();
  
          // write header
          buffer = header.write(buffer, c);
  
          // write fields
          byte packetId = header.packetId;
          FieldPacket field = PacketUtil.getField(alias, orgName, Fields.FIELD_TYPE_LONGLONG);
          field.packetId = ++packetId;
          buffer = field.write(buffer, c);
  
          // write eof
          EOFPacket eof = new EOFPacket();
          eof.packetId = ++packetId;
          buffer = eof.write(buffer, c);
  
          // write rows
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(LongUtil.toBytes(c.getLastInsertId()));
          row.packetId = ++packetId;
          buffer = row.write(buffer, c);
  
          // write last eof
          EOFPacket lastEof = new EOFPacket();
          lastEof.packetId = ++packetId;
          buffer = lastEof.write(buffer, c);
  
          // post write
          c.write(buffer);
      }
  
  }
  