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;
  
  import com.actiontech.dble.plan.common.context.NameResolutionContext;
  import com.actiontech.dble.plan.common.context.ReferContext;
  import com.actiontech.dble.plan.common.field.Field;
  import com.actiontech.dble.plan.common.time.MySQLTime;
  import com.actiontech.dble.plan.node.PlanNode;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.SQLVariantRefExpr;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.util.List;
  
  public class ItemVariables extends Item {
      private String name;
      private Item ref;
  
      public ItemVariables(String name, Item ref) {
          this.name = name;
          this.ref = ref;
      }
  
      @Override
      public Item fixFields(NameResolutionContext context) {
          getReferTables().clear();
          this.getReferTables().add(context.getPlanNode());
          return this;
      }
  
      @Override
      public final void fixRefer(ReferContext context) {
          PlanNode node = context.getPlanNode();
          PlanNode tn = getReferTables().iterator().next();
          node.addSelToReferedMap(tn, this);
      }
  
      @Override
      public ItemType type() {
          return ItemType.VARIABLE_ITEM;
      }
  
      @Override
      public BigDecimal valReal() {
          return ref.valReal();
      }
  
      @Override
      public BigInteger valInt() {
          return ref.valInt();
      }
  
      @Override
      public String valStr() {
          return ref.valStr();
      }
  
      @Override
      public BigDecimal valDecimal() {
          return ref.valDecimal();
      }
  
      @Override
      public boolean getDate(MySQLTime ltime, long fuzzydate) {
          return ref.getDate(ltime, fuzzydate);
      }
  
      @Override
      public boolean getTime(MySQLTime ltime) {
          return ref.getTime(ltime);
      }
  
      @Override
      public SQLExpr toExpression() {
          return new SQLVariantRefExpr(name);
      }
  
      @Override
      protected Item cloneStruct(boolean forCalculate, List<Item> calArgs, boolean isPushDown, List<Field> fields) {
          return new ItemVariables(name, ref.cloneStruct());
      }
  
      public Item getRef() {
          return ref;
      }
  
  }
  