public async Task <object> Execute(RealWorkfolwActivityParameter parameter, RealWorkfolwContext context)
{
RealWorkfolwActivityParameterExpressionDescription parameterDescription = null;
if (!parameter.Extensions.TryGetValue("description", out object objDescription))
{
parameterDescription = await Resolve(parameter, parameter.Configuration);
parameter.Extensions["description"] = parameterDescription;
}
else
{
parameterDescription = (RealWorkfolwActivityParameterExpressionDescription)objDescription;
}
return(await Calculate(parameterDescription, context));
}
private async Task <object> Calculate(RealWorkfolwActivityParameterExpressionDescription description, RealWorkfolwContext context)
{
if (!context.ParameterExpressionResults.TryGetValue(description.Expression, out object result))
{
List <object> inputs = new List <object>();
foreach (var paraitem in description.Parameters)
{
if (paraitem is RealWorkfolwActivityParameterExpressionDescription)
{
inputs.Add(await Calculate((RealWorkfolwActivityParameterExpressionDescription)paraitem, context));
}
else
{
inputs.Add(paraitem.ToString());
}
}
var expressionHandle = _realWorkfolwExpressionHandleSelector.Choose(description.Name);
result = await expressionHandle.Execute(inputs, context);
context.ParameterExpressionResults[description.Expression] = result;
}
return(result);
}
private async Task <RealWorkfolwActivityParameterExpressionDescription> Resolve(RealWorkfolwActivityParameter parameter, string expression)
{
RealWorkfolwActivityParameterExpressionDescription result = new RealWorkfolwActivityParameterExpressionDescription();
result.Expression = expression;
var rootMatch = _regRoot.Match(expression);
if (rootMatch.Success == false)
{
var fragment = new TextFragment()
{
Code = TextCodes.RealWorkfolwActivityParameterHandleExecuteError,
DefaultFormatting = "工作流活动参数处理出错，错误原因：{0}，参数名称：{1}，参数数据类型：{2}，参数表达式类型：{3}，参数配置：{4}，发生位置：{5}",
ReplaceParameters = new List <object>()
{
parameter.Name, parameter.DataType, parameter.ExpressionType, parameter.Configuration, $"{this.GetType().FullName}.Execute"
}
};
throw new UtilityException((int)Errors.RealWorkfolwActivityParameterHandleExecuteError, fragment);
}
string rootName;
string strRootName = rootMatch.Groups[1].Value;
var arrayStrRootName = strRootName.Split('_');
rootName = arrayStrRootName[0];
result.Name = rootName;
var expressions = _regExpression.Matches(rootMatch.Groups[2].Value);
Dictionary <int, RealWorkfolwActivityParameterExpressionDescription> expressionParameters = new Dictionary <int, RealWorkfolwActivityParameterExpressionDescription>();
int parIndex = 0;
for (var index = 0; index <= expressions.Count - 1; index++)
{
expressionParameters[parIndex] = await Resolve(parameter, expressions[index].Value);
parIndex++;
}
var newStrPars = _regExpression.Replace(rootMatch.Groups[2].Value, @"\n");
var arrayParas = _regParSep.Split(newStrPars);
parIndex = 0;
List <object> inputs = new List <object>();
foreach (var itemPara in arrayParas)
{
if (itemPara == @"\n")
{
inputs.Add(expressionParameters[parIndex]);
}
else
{
inputs.Add(itemPara.Replace(@"\,", @",").Replace(@"\)", @")").Replace(@"\(", @"(").Replace(@"\\", @"\"));
}
}
result.Parameters = inputs;
return(result);
}
