protected IList <SqlClause> ParseChilds()
{
/*
* 一个动态子句的形式为：{? .. #ParamName# ..} 或者 {? .. $ParamName$ ..}. 或者 {? .. {? .. } {?..} }
*
* 1.必须出现一个而且只能是一个参数子句，可以是命名参数或者值替换参数
* 2.如果出现动态语句，那么不能出现参数语句
*/
IList <SqlClause> clauses = SqlParser.ParseToClauses(Content);
//如果找到动态语句，那么必须全部文本或动态语句
DynamicClause clause = clauses.FirstOrDefault(c => c is DynamicClause) as DynamicClause;
if (null != clause)
{
if (clauses.Any(c => c is ParameterClause))
{
throw new FoxOneException("嵌套的动态语句{?..}和命名参数(#..#或$..$)不能同时出现在一个动态语句中 : " + RawText);
}
_foundNestedDynamicClause = true;
}
else if (!FindSingleParameterClause(clauses))
{
throw new FoxOneException("动态语句{?..}中必须包含命名参数或者嵌套的动态语句 : " + RawText);
}
return(clauses);
}
public override bool ToCommand(IDaoProvider provider, SqlCommandBuilder builder, ISqlParameters parameters)
{
IDictionary <string, object> outParams = new Dictionary <string, object>();
string sql = _executor.Execute(_action, parameters, outParams);
if (!string.IsNullOrEmpty(sql))
{
parameters = outParams.Count == 0 ? parameters : new ArrayParameters(outParams, parameters);
IList <SqlClause> clauses = SqlParser.ParseToClauses(sql);
foreach (SqlClause clause in clauses)
{
clause.ToCommand(provider, builder, parameters);
}
}
return(true);
}
private static Dictionary <string, ISqlStatement> LoadSqlsFromXml(string file, XElement root)
{
Dictionary <string, ISqlStatement> sqls = new Dictionary <string, ISqlStatement>();
//支持配置文件编写如Users.Oracle.config来表示SQL只适用于某个数据库类型
string subfix = "";
string daoProviderName = ExtractDaoProviderName(file);
if (!string.IsNullOrEmpty(daoProviderName) &&
null != DaoFactory.GetDaoProvider(daoProviderName))
{
subfix = "$" + daoProviderName.ToLower();
}
foreach (XElement element in root.Elements())
{
XAttribute attribute = element.Attribute("key");
if (null == attribute || string.IsNullOrEmpty(attribute.Value))
{
throw new InvalidOperationException(string.Format("'key' attribute must has a value of command in '{0}'", file));
}
string key = attribute.Value + subfix;
// default sql don't support @ or ： native db named param
XAttribute ignoreDbNamedParam = element.Attribute("ignoreDbNamedParam");
ISqlStatement statement = SqlParser.Parse(element.Value, null != ignoreDbNamedParam && ignoreDbNamedParam.Value.Equals("true", StringComparison.OrdinalIgnoreCase));
XAttribute connection = element.Attribute("connection");
if (null != connection)
{
statement.Connection = connection.Value;
}
sqls[key] = statement;
}
return(sqls);
}