public virtual object Execute(ICommandContext commandContext)
{
if (ReferenceEquals(executionId, null))
{
throw new ActivitiIllegalArgumentException("executionId is null");
}
if (ReferenceEquals(variableName, null))
{
throw new ActivitiIllegalArgumentException("variableName is null");
}
IExecutionEntity execution = commandContext.ExecutionEntityManager.FindById <IExecutionEntity>(executionId);
if (execution == null)
{
throw new ActivitiObjectNotFoundException("execution " + executionId + " doesn't exist", typeof(IExecution));
}
object value;
if (isLocal)
{
value = execution.GetVariableLocal(variableName, false);
}
else
{
value = execution.GetVariable(variableName, false);
}
return(value);
}
protected internal virtual int?GetLocalLoopVariable(IExecutionEntity execution, string variableName)
{
object value = execution.GetVariableLocal(variableName);
if (!(value is int?))
{
return(null);
}
return((int?)value);
}
protected internal virtual int?GetLoopVariable(IExecutionEntity execution, string variableName)
{
object value = execution.GetVariableLocal(variableName);
IExecutionEntity parent = execution.Parent;
while (value == null && parent != null)
{
value = parent.GetVariableLocal(variableName);
parent = parent.Parent;
}
return((int?)value);
}
private T GetVariable <T>(IExecutionEntity execution, string variableName)
{
object value = execution.GetVariableLocal(variableName);
IExecutionEntity parent = execution.Parent;
while (value == null && parent != null)
{
value = parent.GetVariableLocal(variableName);
parent = parent.Parent;
}
return((T)value);
}
/// <summary>
/// 循环获取流程实例变量
/// </summary>
/// <typeparam name="T">返回类型</typeparam>
/// <param name="execution">流程实例</param>
/// <param name="variableName">变量名</param>
/// <returns></returns>
internal static T GetLoopVariable <T>(this IExecutionEntity execution, string variableName)
{
object value = execution.GetVariableLocal(variableName);
IExecutionEntity parent = execution.Parent;
while (value == null && parent != null)
{
value = parent.GetLoopVariable <T>(variableName);
parent = parent.Parent;
}
return(value == null ? default : JToken.FromObject(value).ToObject <T>());
}
public void Notify(IExecutionEntity execution)
{
IExecutionEntity miRoot = execution.Parent;
if (miRoot.IsMultiInstanceRoot &&
execution.CurrentFlowElement is CallActivity callActivity)
{
int nrOfExecInstances = ((int?)miRoot.GetVariableLocal(NUMBER_OF_EXECUTION_INSTANCES)).GetValueOrDefault(0);
miRoot.SetVariableLocal(NUMBER_OF_EXECUTION_INSTANCES, nrOfExecInstances + 1);
string collectionVarName = callActivity.LoopCharacteristics.GetCollectionVarName();
string[] businessKeys = miRoot.GetVariable <JArray>(collectionVarName).ToObject <string[]>();
execution.BusinessKey = businessKeys[nrOfExecInstances];
}
}