public Boolean SystemSet(String systemName, out INametableItem systemItem)
{
// Find identifier
IEnvironment context;
Boolean Found = FindIdentifier(systemName, out context, out systemItem);
if (Found && (context == this) && (systemItem.Identifierkind != IdentifierKind.UnitSystem))
{ // Found locally but is not a system; Can't set as system
return(false);
}
if (context == null)
{
context = this;
}
// Either identifier is a system in some context; set it to specified value
// or identifier not found; No local identifier with that name, Declare local system
systemItem = new NamedSystem(systemName);
Physics.CurrentUnitSystems.Use((systemItem as NamedSystem).UnitSystem);
return(context.SetLocalIdentifier(systemName, systemItem));
}
public Boolean UnitSet(IUnitSystem unitSystem, String unitName, Quantity unitValue, String unitSymbol, out INametableItem unitItem, out string errorMessage)
{
// Find identifier
Boolean Found = FindIdentifier(unitName, out IEnvironment context, out unitItem);
if (Found && (context == this) && (unitItem.Identifierkind != IdentifierKind.Unit))
{ // Found locally, but is not a unit; Can't set as unit
errorMessage = unitName + " is found locally but is not a unit; Can't set as unit";
return(false);
}
if (context == null)
{
context = this;
}
(bool OK, String errormessage)updateRes;
if (unitItem == null)
{
// Either is identifier an unit in some context; set it to specified value
// or identifier not found; No local identifier with that name, Declare local unit
if (unitSystem == null)
{
if (unitValue != null && unitValue.Unit != null)
{ // Is same system as values unit
unitSystem = unitValue.Unit.ExponentsSystem;
}
/**
* if (unitSystem == null)
* { // Is first unit in a new system
* if (SystemSet(unitName + "_system", out INametableItem SystemItem))
* {
* unitSystem = ((NamedSystem)SystemItem).UnitSystem;
* }
* }
**/
}
unitItem = new NamedUnit(unitSystem, unitName, unitSymbol, unitValue, this);
updateRes = (true, "");
}
else
{
NamedUnit nui = (NamedUnit)unitItem;
updateRes = nui.UpdateUnit(unitName, unitValue);
}
errorMessage = updateRes.errormessage;
if (!updateRes.OK)
{
return(false);
}
return(context.SetLocalIdentifier(unitName, unitItem));
}
public Boolean FindIdentifier(String identifierName, out IEnvironment foundInContext, out INametableItem item)
{
// Check local items
Boolean Found = FindLocalIdentifier(identifierName, out item);
if (Found)
{
foundInContext = this;
return(true);
}
else
// Check outher context
if (OuterContext != null)
{
return(OuterContext.FindIdentifier(identifierName, out foundInContext, out item));
}
foundInContext = null;
return(false);
}
// Check local items public Boolean FindLocalIdentifier(String identifierName, out INametableItem item) => NamedItems.GetItem(identifierName, out item);
// Update or add local item public Boolean SetLocalIdentifier(String identifierName, INametableItem item) => NamedItems.SetItem(identifierName, item);
public Boolean UnitSet(IUnitSystem unitSystem, String unitName, Quantity unitValue, out INametableItem unitItem)
{
// Find identifier
IEnvironment context;
Boolean Found = FindIdentifier(unitName, out context, out unitItem);
if (Found && (context == this) && (unitItem.Identifierkind != IdentifierKind.Unit))
{ // Found locally but is not a unit; Can't set as unit
return(false);
}
if (context == null)
{
context = this;
}
// Either is identifier an unit in some context; set it to specified value
// or identifier not found; No local identifier with that name, Declare local unit
if (unitSystem == null)
{
if (unitValue != null && unitValue.Unit != null)
{ // Is same system as values unit
unitSystem = unitValue.Unit.ExponentsSystem;
}
if (unitSystem == null)
{ // Is first unit in a new system
INametableItem SystemItem;
if (SystemSet(unitName + "_system", out SystemItem))
{
unitSystem = ((NamedSystem)SystemItem).UnitSystem;
}
}
}
unitItem = new NamedUnit(unitSystem, unitName, unitValue, this);
return(context.SetLocalIdentifier(unitName, unitItem));
}
