/// <summary>
/// 解析查询模板
/// </summary>
/// <param name="builder">参数化查询构建器</param>
/// <param name="template">查询模板</param>
/// <returns>解析结果</returns>
private ParameterizedQuery ParseTemplate(IParameterizedQueryBuilder builder, FormattableString template)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (template == null)
{
throw new ArgumentNullException(nameof(template));
}
lock (builder.SyncRoot)
{
var templateText = template.Format;
for (var i = 0; i < templateText.Length; i++)
{
var ch = templateText[i];
if (ch == '{')
{
if (i == templateText.Length - 1)
{
throw FormatError(templateText, i);
}
if (templateText[i + 1] == '{')
{
i++;
builder.Append('{');
continue;
}
Match match = null;
do
{
match = numberRegex.Match(templateText, i);
if (match.Success)
{
int parameterIndex;
if (!int.TryParse(match.Groups["index"].Value, out parameterIndex))
{
throw FormatError(templateText, i);
}
AddParameter(builder, template.GetArgument(parameterIndex));
break;
}
} while (false);
if (match == null || !match.Success)
{
throw FormatError(templateText, i);
}
i += match.Length - 1;
}
else if (ch == '}')
{
if (i == templateText.Length - 1)
{
throw FormatError(templateText, i);
}
if (templateText[i + 1] == '}')
{
i++;
builder.Append('}');
continue;
}
}
else
{
builder.Append(ch);
}
}
return(builder.BuildQuery(null));
}
}
