public static keyValue <string, string> Convert(LambdaExpression expression, charStream stream)
{
converter converter = new converter();
converter.create(expression, stream);
return(new keyValue <string, string>(converter.FirstMemberName, converter.FirstMemberSqlName));
}
public static keyValue <string, string> Convert(LambdaExpression expression)
{
converter converter = new converter();
string sql = converter.Create(expression);
return(new keyValue <string, string>(converter.FirstMemberName, sql));
}
/// <summary>
/// 委托关联表达式转SQL表达式
/// </summary>
/// <param name="expression">委托关联表达式</param>
/// <param name="isCache">是否缓存</param>
/// <param name="nameType">获取参数名称方式</param>
/// <returns>SQL表达式,参数成员名称集合</returns>
public static keyValue <string, list <string> > Convert(LambdaExpression expression, bool isCache, getNameType nameType)
{
nameCache cache;
if (isCache && expressionCache.TryGetValue(expression, out cache))
{
string sql = cache[nameType];
if (sql != null)
{
return(new keyValue <string, list <string> >(sql, cache.ParameterMemberNames));
}
converter converter = new converter(expression, nameType);
cache[nameType] = sql = converter.sql;
cache.ParameterMemberNames = converter.parameterMemberNames;
return(new keyValue <string, list <string> >(sql, cache.ParameterMemberNames));
}
else
{
converter converter = new converter(expression, nameType);
string sql = converter.sql;
if (isCache)
{
expressionCache[expression] = cache = new nameCache();
cache.ParameterMemberNames = converter.parameterMemberNames;
cache[nameType] = sql;
}
return(new keyValue <string, list <string> >(sql, converter.parameterMemberNames));
}
}
