public Object Template()
{
Axiom clone = Clone() as Axiom;
Hashtable newBinds = clone.Bindings;
List <string> keys = new List <string>();
foreach (string key in newBinds.Keys)
{
keys.Add(key);
}
foreach (string key in keys)
{
newBinds[key] = "";
}
clone.Bindings = newBinds;
clone.BindTerms();
return(clone);
}
// Checks if two operators are equal.
public override bool Equals(Object obj)
{
// Store the object an axiom
Axiom ax = obj as Axiom;
// If the number of preconditions are the same...
if (ax.Preconditions.Count == Preconditions.Count)
{
// Loop through the preconditions.
foreach (Predicate precondition in Preconditions)
{
if (!ax.Preconditions.Contains(precondition))
{
return(false);
}
}
// If the number of effects are the same...
if (ax.Effects.Count == Effects.Count)
{
// Loop through the effects.
foreach (Predicate effect in Effects)
{
if (!ax.Effects.Contains(effect))
{
return(false);
}
}
// Otherwise, return true!
return(true);
}
}
// Otherwise, fail.
return(false);
}
// Find applicable conditional effects.
public List <IAxiom> ApplicableConditionals(Operator action, List <IObject> objects)
{
// Store the conditional axioms that are true in the current state.
List <IAxiom> applicableEffects = new List <IAxiom>();
// Loop through the action's conditional effect axioms.
foreach (IAxiom conditional in action.Conditionals)
{
List <Hashtable> bindings = new List <Hashtable>();
if (conditional.Arity == 0)
{
Hashtable thisBind = action.Bindings.Clone() as Hashtable;
bindings.Add(thisBind);
}
else
{
for (int i = 0; i < conditional.Arity; i++)
{
List <Hashtable> lastBindings = new List <Hashtable>();
foreach (Hashtable lastBinding in bindings)
{
lastBindings.Add(lastBinding.Clone() as Hashtable);
}
List <Hashtable> newBindings = new List <Hashtable>();
foreach (IObject obj in objects)
{
List <Hashtable> theseBindings = new List <Hashtable>();
if (lastBindings.Count > 0)
{
foreach (Hashtable bind in lastBindings)
{
Hashtable thisBind = bind.Clone() as Hashtable;
thisBind.Add(conditional.TermAt(i), obj.Name);
theseBindings.Add(thisBind);
}
}
else
{
Hashtable thisBind = action.Bindings.Clone() as Hashtable;
thisBind.Add(conditional.TermAt(i), obj.Name);
theseBindings.Add(thisBind);
}
newBindings.AddRange(theseBindings);
}
bindings = newBindings;
}
}
foreach (Hashtable bind in bindings)
{
Axiom boundAxiom = conditional.Clone() as Axiom;
boundAxiom.Bindings = bind;
applicableEffects.Add(boundAxiom);
}
}
List <IAxiom> removeCond = new List <IAxiom>();
foreach (IAxiom conditional in applicableEffects)
{
conditional.BindTerms();
if (!Satisfies(conditional.Preconditions))
{
removeCond.Add(conditional);
}
}
foreach (Axiom remove in removeCond)
{
applicableEffects.Remove(remove);
}
return(applicableEffects);
}