content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  package com.actiontech.dble.plan.common.item.function.strfunc;
  
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.ItemFunc;
  
  import java.util.List;
  
  
  public class ItemFuncQuote extends ItemStrFunc {
  
      public ItemFuncQuote(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "quote";
      }
  
      @Override
      public String valStr() {
          String old = args.get(0).valStr();
          if (args.get(0).isNull()) {
              this.nullValue = true;
              return EMPTY;
          }
          StringBuilder newSb = new StringBuilder();
          newSb.append("'");
          for (char c : old.toCharArray()) {
              switch (c) {
                  case 0:
                  case '\032':
                  case '\'':
                  case '\\':
                      newSb.append('\\').append(c);
                      break;
                  default:
                      newSb.append(c);
                      break;
              }
          }
          newSb.append("'");
          return newSb.toString();
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncQuote(realArgs, charsetIndex);
      }
  }
  