Allow replacing configuration properties on ProviderSqlSource

[kazuki43zoo]

In current implementation of ProviderSqlSource, it does not allow replacing configuration properties using placeholder(${...}). I want to allow replacing it using placeholder as follow:

• mybatis-config.xml

<properties>
  <property name="Constants.LOGICAL_DELETE_OFF" value="false"/>
</properties>

• sql provider method

public String buildSql(@Param("name") final String name) {
  return new SQL(){{
    SELECT("*");
    FROM("test");
    if (name != null) {
      WHERE("name like #{name} || '%'");
    }
    WHERE("logical_delete = ${Constants.LOGICAL_DELETE_OFF}");
  }}.toString();
}