protected static ActivityVariable <T> GetVariable <T>(ActivityVariable <T> variableDefinition, GetVariablesDelegate getMethod, int id)
{
object rawVariable = null;
if (id != DummyId)
{
using (Transaction trans = DatabaseAccess.ForSystemDatabase.GetRequestTransaction()) {
using (IDataReader reader = getMethod(trans, variableDefinition.Key, id)) {
if (reader.Read())
{
rawVariable = RuntimePlatformUtils.ConvertFromString((string)reader["Value"], (string)reader["Data_Type"]);
}
}
}
}
return((rawVariable != null) ? variableDefinition.NewInstance <T>(rawVariable) : variableDefinition.NewInstance <T>());
}
protected static ActivityVariable <T> GetVariable <T>(Dictionary <ObjectKey, IActivityVariable> collection, ActivityVariable <T> variableDefinition, GetVariablesDelegate getMethod, int id)
{
IActivityVariable variable;
ActivityVariable <T> variableGeneric;
if (collection.TryGetValue(variableDefinition.Key, out variable))
{
variableGeneric = variable as ActivityVariable <T>;
if (variableGeneric == null) //for some reason it has the wrong type, so lets fix it here
{
variableGeneric = variableDefinition.NewInstance <T>(variable.ValueObj);
collection[variableDefinition.Key] = variableGeneric;
}
}
else
{
variableGeneric = GetVariable(variableDefinition, getMethod, id);
collection[variableDefinition.Key] = variableGeneric;
}
return(variableGeneric);
}
public ActivityVariable <T> GetProcessOutput <T>(ActivityVariable <T> variableDefinition)
{
return(GetVariable(ProcessOutputs, variableDefinition, DBRuntimePlatform.Instance.GetProcessOutput, ProcessId));
}