// Search for a totalling action with the supplied field_name. If can't find, return null.
public TotallingMC get_TotallingMC(string field_name)
{
// Look for an IndexMC with a Field name matching idx_field_name.
foreach (MediatorColleague mc in mcList)
{
if (mc is MCAction)
{
MCAction mca = (MCAction)mc;
// Two parts to the condition: field name must match, must be a TotallingAction
if (mca.get_action().field.name == field_name && mca is TotallingMC)
return (TotallingMC)mca;
}// if
}//foreach
// If got here and not returned - throw exception and return
return null;
}
// Search for a valid index with the supplied field_name. If can't find, return null.
public List<string> get_index(string idx_field_name)
{
List<string> rtn_idx = null;
// Look for an IndexMC with a Field name matching idx_field_name.
foreach (MediatorColleague mc in mcList)
{
if (mc is MCAction)
{
MCAction mca = (MCAction)mc;
// Three parts to the condition: field name must match, must be an Index, and it must be valid
if (mca.get_action().field.name == idx_field_name && mca.get_action() is IndexingAction && mca.isValid == true)
{
IndexingAction ia = (IndexingAction)mca.get_action();
rtn_idx = ia.getStrLst();
}
}
}
return rtn_idx;
}
}// iterate_snapview
// Pull out an action of type "mytype"
// Return with the first one matching field_name
// DEPRECATED : see get_totalling_action(..) below
public TotallingAction pullOutTotallingAction(string field_name)
{
foreach(MediatorColleague mc in mcList){
if (mc is MCAction)
{
MCAction mca = (MCAction)mc;
BaseAction ba = mca.get_action();
if (ba is TotallingAction && ba.field.name == field_name)
{
return ba as TotallingAction;
}
}
}
// If not returned by now, haven't found one.
return null;
}
// This method polls the snapview to see whether it is "invalid" and if it is, triggers an interate
public void iterate_snapview()
{
//// NEED TO THINK ABOUT WHETHER I NEED THIS..
//// Poll all the MC's - if find >= 1 which is isValid==false then trigger iteration
//bool all_mcs_valid = true;
//foreach (MediatorColleague mc in mcList)
//{
// if (!mc.isValid) all_mcs_valid = false;
//}
//// If the snapview is "not" valid - then we need to iterate
//if (!all_mcs_valid)
//{
// Two kinds of iteration:
// 1) If no filters involved, just iterate without changing snapview
// 2) If there are filters involved, we have to create a new snapview
bool filters_involved = false;
// First collect all the "inValid" actions, and do any initialising
List<MCAction> mca_list = new List<MCAction>(10);
foreach(MediatorColleague mc in mcList){
if (mc is MCAction)
{
MCAction mca = (MCAction)mc;
// ONLY add if this MC is inValid. If it's valid, it doesn't need to be re-calculated in the iteration
if (mca.isValid == false)
{
mca_list.Add(mca);
// test for filters
if (mca.get_action() is BaseFilter) filters_involved = true;
// NASTY: doing both class and interface versions of this. ONLY DO INTERFACE
// Call inits if necessary (E.g., all Stat calclation actions need to be re-initialised)
if (mca.get_action() is InitAction )
{
InitAction ia = (InitAction)(mca.get_action());
ia.init();
}
if (mca.get_action() is InitActionIface)
{
InitActionIface ia = (InitActionIface)(mca.get_action());
ia.init();
}
}// if isValid==false
}// if MCAction
}// foreach
try
{
// Do the iteration
if (!filters_involved)
{
get_snapview().iterate(mca_list);
}
else
{
get_snapview().iterate_and_filter(mca_list);
}
}//try
catch(SnapViewNotFoundException exc)
{
System.Diagnostics.Debug.WriteLine(exc.ToString());
}
// Iterate over MC's and perform any Post methods
// (E.g., caching the index in a field)
foreach (MCAction mca in mca_list)
{
if (mca.get_action() is PostActionIface)
{
PostActionIface pa = (PostActionIface)mca.get_action();
pa.post();
}
}
// We have just done a fresh iteration. So set all MC's to isValid==true
foreach (MediatorColleague mc in mcList)
{
mc.isValid = true;
}
// Prob relocate this: Remove all FilterMC's because makes no sense to reuse
var mc_node = mcList.First;
while (mc_node != null)
{
var nextNode = mc_node.Next;
if (mc_node.Value is FilterMC)
{
mcList.Remove(mc_node);
}
mc_node = nextNode;
}
//}//if !(all mc's valid)
}// iterate_snapview
