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.builder.impl;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.*;
  import com.alibaba.druid.sql.builder.SQLBuilder;
  
  public class SQLBuilderImpl implements SQLBuilder {
      public static SQLExpr toSQLExpr(Object obj, DbType dbType) {
          if (obj == null) {
              return new SQLNullExpr();
          }
  
          if (obj instanceof Integer) {
              return new SQLIntegerExpr((Integer) obj);
          }
  
          if (obj instanceof Number) {
              return new SQLNumberExpr((Number) obj);
          }
  
          if (obj instanceof String) {
              return new SQLCharExpr((String) obj);
          }
  
          if (obj instanceof Boolean) {
              return new SQLBooleanExpr((Boolean) obj);
          }
  
          throw new IllegalArgumentException("not support : " + obj.getClass().getName());
      }
  }
  