/// <summary>
/// Accepts operation
/// </summary>
/// <param name="type">Argument type</param>
/// <returns>The operation</returns>
public IObjectOperation Accept(object type)
{
IObjectOperation ownOp = acceptor.Accept(type);
if (ownOp != null)
{
return(ownOp);
}
if (type is ArrayReturnType)
{
ArrayReturnType a = type as ArrayReturnType;
if (a.IsObjectType)
{
IObjectOperation op = acceptor.Accept(a.ElementType);
if (op == null)
{
return(null);
}
IObjectOperation dop = GetDynamicalOperation(a, op);
if (dop != null)
{
return(dop);
}
return(new ArrayOperation(op, new object[] { type }));
}
}
IObjectOperation ope = acceptor.Accept(type);
if (ope != null)
{
return(ope);
}
if (type is ArrayReturnType)
{
ArrayReturnType a = type as ArrayReturnType;
IObjectOperation op = acceptor.Accept(a.ElementType);
if (op == null)
{
return(null);
}
IObjectOperation dop = GetDynamicalOperation(a, op);
if (dop != null)
{
return(dop);
}
return(new ArrayOperation(op, new object[] { type }));
}
return(null);
}
/// <summary>
/// Implements the Visitor design pattern.
/// </summary>
/// <param name="acceptor">
/// The object accepting this operation.
/// </param>
public override void Visit(IOperationAcceptor acceptor)
{
Guard.NotNull(acceptor, nameof(acceptor));
acceptor.Accept(this);
}
/// <summary>
/// Implements the Visitor design pattern.
/// </summary>
/// <param name="acceptor">
/// The object accepting this operation.
/// </param>
public override void Visit(IOperationAcceptor acceptor)
{
Guard.NotNull(acceptor, nameof(acceptor));
acceptor.Accept(this);
}
/// <summary>
/// Processes ordinary operation
/// </summary>
/// <param name="formula">Formula</param>
/// <param name="creator">Formula creator</param>
/// <returns>True if operation exists and false otherwise</returns>
protected bool processOperation(MathFormula formula, IFormulaObjectCreator creator)
{
int braCount = 0;
ObjectFormulaTree tree = null;
for (int i = 0; i < creator.OperationCount; i++)
{
IOperationDetector detector = creator.GetDetector(i);
IOperationAcceptor acceptor = detector.Detect(formula[braCount]);
if (acceptor == null)
{
continue;
}
TypeInfo dt = detector.ToTypeInfo();
TreeTransformationAttribute attr = detector.GetAttribute <TreeTransformationAttribute>();
if (attr != null)
{
ITreeTransformation trans = acceptor as ITreeTransformation;
if (tree == null)
{
tree = CreateTree(new MathFormula(formula, 2 * braCount + 1, formula.Count - 1), creator);
}
if (tree != null)
{
ObjectFormulaTree tr = trans.Transform(tree);
if (tr != null)
{
operation = tr.operation;
children = tr.children;
y = tr.y;
return(true);
}
}
}
object type = null;
if (formula.Count > 1)
{
if (tree == null)
{
tree = CreateTree(new MathFormula(formula, 2 * braCount + 1, formula.Count - 1), creator);
}
type = tree.ReturnType;
}
if (acceptor is IMultiVariableOperationAcceptor)
{
IMultiVariableOperationAcceptor ma = acceptor as IMultiVariableOperationAcceptor;
IMultiVariableOperation multiOp = ma.AcceptOperation(formula[0]);
MathSymbol s = formula[0];
ObjectFormulaTree[] trees = null;
object[] types = null;
if (s.HasChildren)
{
int n = 0;
for (int j = 0; j < s.Count; j++)
{
if (s[j] != null)
{
if (!s[j].IsEmpty)
{
++n;
}
}
}
trees = new ObjectFormulaTree[n];
types = new object[n];
n = 0;
for (int j = 0; j < s.Count; j++)
{
if (s[j] != null)
{
if (!s[j].IsEmpty)
{
ObjectFormulaTree tr = CreateTree(s[j], creator);
if (tr == null)
{
operation = null;
goto mo;
}
trees[j] = tr;
types[j] = trees[j].ReturnType;
++n;
}
}
}
}
operation = multiOp.Accept(types);
mo:
if (operation == null)
{
continue;
}
y = new object[types.Length];
if (trees != null)
{
foreach (ObjectFormulaTree t in trees)
{
if (t != null)
{
children.Add(t);
}
}
}
return(true);
}
IObjectOperation op = acceptor.Accept(type);
if (op != null)
{
if (op.IsPowered())
{
if (formula.First.HasChildren)
{
ObjectFormulaTree pow = CreateTree(formula.First[0], creator);
ObjectFormulaTree val = new ObjectFormulaTree();
val.operation = op;
val.y = new object[op.InputTypes.Length];
val.CreateResult();
if (tree != null)
{
val.children.Add(tree);
}
IObjectOperation powOp = creator.GetPowerOperation(val.ReturnType, pow.ReturnType);
if (powOp == null)
{
return(false);
}
operation = powOp;
children.Add(val);
children.Add(pow);
y = new object[2];
return(true);
}
}
operation = op;
if (tree != null)
{
children.Add(tree);
y = new object[1];
}
return(true);
}
}
return(false);
}