content: /*
   * Copyright 1999-2017 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.druid.sql.ast;
  
  import java.util.List;
  
  public abstract class SQLExprImpl extends SQLObjectImpl implements SQLExpr {
      protected boolean parenthesized;
      protected int parenthesizedCount;
      public SQLExprImpl() {
      }
  
      public boolean isParenthesized() {
          return parenthesized;
      }
  
      public void setParenthesized(boolean parenthesized) {
          this.parenthesized = parenthesized;
          if (parenthesized) {
              parenthesizedCount++;
          } else {
              parenthesizedCount--;
          }
      }
  
      public int getParenthesizedCount() {
          return parenthesizedCount;
      }
  
      public void setParenthesizedCount(int parenthesizedCount) {
          this.parenthesizedCount = parenthesizedCount;
      }
  
      public void increaseParenthesizedCount() {
          this.parenthesizedCount++;
      }
  
      public abstract boolean equals(Object o);
  
      public abstract int hashCode();
  
      public abstract SQLExpr clone();
  
      protected void cloneTo(SQLExprImpl x) {
          super.cloneTo(x);
          x.parenthesized = this.parenthesized;
          x.parenthesizedCount = this.parenthesizedCount;
      }
  
      public SQLDataType computeDataType() {
          return null;
      }
  
      @Override
      public List<SQLObject> getChildren() {
          return null;
      }
  
  }
  