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.expr;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLExprImpl;
  import com.alibaba.druid.sql.ast.SQLObject;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.math.BigDecimal;
  import java.util.Collections;
  import java.util.List;
  
  public class SQLSizeExpr extends SQLExprImpl {
      private SQLExpr value;
      private Unit unit;
  
      public SQLSizeExpr() {
      }
  
      public SQLSizeExpr(String value, char unit) {
          this.unit = Unit.valueOf(Character.toString(unit).toUpperCase());
          if (value.indexOf('.') == -1) {
              this.value = new SQLIntegerExpr(Integer.parseInt(value));
          } else {
              this.value = new SQLNumberExpr(new BigDecimal(value));
          }
      }
  
      public SQLSizeExpr(SQLExpr value, Unit unit) {
          super();
          this.value = value;
          this.unit = unit;
      }
  
      @Override
      public void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              if (this.value != null) {
                  this.value.accept(visitor);
              }
          }
          visitor.endVisit(this);
      }
  
      public List<SQLObject> getChildren() {
          return Collections.<SQLObject>singletonList(value);
      }
  
      public SQLExpr getValue() {
          return value;
      }
  
      public void setValue(SQLExpr value) {
          this.value = value;
      }
  
      public Unit getUnit() {
          return unit;
      }
  
      public void setUnit(Unit unit) {
          this.unit = unit;
      }
  
      public static enum Unit {
          B, K, M, G, T, P, E
      }
  
      public SQLSizeExpr clone() {
          SQLSizeExpr x = new SQLSizeExpr();
  
          if (value != null) {
              x.setValue(value.clone());
          }
          x.unit = unit;
  
          return x;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          SQLSizeExpr that = (SQLSizeExpr) o;
  
          if (value != null ? !value.equals(that.value) : that.value != null) {
              return false;
          }
          return unit == that.unit;
      }
  
      @Override
      public int hashCode() {
          int result = value != null ? value.hashCode() : 0;
          result = 31 * result + (unit != null ? unit.hashCode() : 0);
          return result;
      }
  }
  