/// <summary>
/// Calculates a hashcode for a predicate
/// </summary>
/// <param name="predicate">Predicate to evaluate</param>
/// <returns>Hashcode</returns>
/// <remarks>Written separately so that it can be used for calculating hashes on predicat caching</remarks>
protected static int CalculateHashCode(Predicate predicate)
{
return CalculateHashCode(predicate.Name, predicate.IsNegative, predicate.Parameters);
}
/// <summary>
/// Are the Predicates Negatives of Eachother
/// </summary>
/// <param name="predicate">Predicate to Compare</param>
/// <returns>True is the Predicate is the Compliment</returns>
public bool IsComplimentOf(Predicate predicate)
{
bool result = false;
if (Name == predicate.Name && IsNegative != predicate.IsNegative && Parameters.Count == predicate.Parameters.Count)
{
result = true;
for (int i = 0; i < Parameters.Count; i++)
{
if (Parameters[i] != predicate.Parameters[i])
{
result = false;
break;
}
}
}
return result;
}
/// <summary>
/// Adds a Predicate to the current cache
/// </summary>
/// <param name="predicate">Predicate to add</param>
protected static void AddPredicate(Predicate predicate)
{
moPredicateCache[predicate.GetHashCode()] = predicate;
}
/// <summary>
/// Create an Action
/// </summary>
/// <param name="actionIdentity"></param>
public Action(Predicate actionIdentity)
{
moActionIdentity = actionIdentity;
}
/// <summary>
/// Create a Predicate
/// </summary>
/// <param name="name">Name of Predicate</param>
/// <param name="isNegative">Is Negative</param>
/// <param name="parameters">Parameters</param>
/// <returns>Predicate</returns>
public static Predicate Create(string name, bool isNegative, params Term[] parameters)
{
Predicate predicate = Predicate.FindPredicate(name, isNegative, parameters);
ConstantTerm ct = null;
if (predicate == null)
{
predicate = new Predicate(name, isNegative, parameters);
Predicate.AddPredicate(predicate);
}
return predicate;
}
/// <summary>
/// Add a Precondition
/// </summary>
/// <param name="predicate">A Predicate to Add</param>
public void AddPrecondition(Predicate predicate)
{
moPreconditionList.Add(predicate);
}
/// <summary>
/// Add an Effect to the Effects
/// </summary>
/// <param name="predicate">A Predicate to Add</param>
public void AddEffect(Predicate predicate)
{
moEffectList.Add(predicate);
}
/// <summary>
/// Add a Causal Link
/// </summary>
/// <param name="from">From Action</param>
/// <param name="achieves">The Predicate that Achieves</param>
/// <param name="to">To Action</param>
public void AddCausalLink(Action from, Predicate achieves, Action to)
{
moCausalLinks.Add(new CausalLink(from, achieves, to));
}
/// <summary>
/// Create a Non-Primitive Task
/// </summary>
/// <param name="actionIdentity"></param>
/// <param name="subTasks"></param>
public Task(Predicate actionIdentity, params Task[] subTasks)
: base(actionIdentity)
{
mbIsPrimitive = false;
moSubTasks = new TaskList(subTasks);
}
/// <summary>
/// Create a Task
/// </summary>
/// <param name="actionIdentity"></param>
public Task(Predicate actionIdentity)
: base(actionIdentity)
{
mbIsPrimitive = true;
}