using System;
using System.Collections.Generic;
using System.Text;
using BaseTypes;
using FormulaEditor.Interfaces;
namespace FormulaEditor
{
public class VectorScalarProduct : ScalarVectorProduct, IBinaryAcceptor
{
static private readonly Double a = 0;
internal static readonly VectorScalarProduct Object = new VectorScalarProduct(-1);
private VectorScalarProduct(int dimension)
: base(dimension)
{
}
public override object this[object[] x]
{
get
{
double[] a = x[0] as double[];
double b = (double)x[1];
for (int i = 0; i < a.Length; i++)
{
result[i] = a[i] * b;
}
return result;
}
}
#region IBinaryAcceptor Members
IObjectOperation IBinaryAcceptor.Accept(object typeA, object typeB)
{
int n = check(typeA, typeB);
if (n > 0)
{
return new VectorScalarProduct(n);
}
n = check(typeB, typeA);
if (n < 0)
{
return null;
}
return new ScalarVectorProduct(n);
}
#endregion
static private int check(object ta, object tb)
{
if (!((ta is ArrayReturnType) & tb.Equals(a)))
{
return -1;
}
ArrayReturnType at = ta as ArrayReturnType;
if (!at.ElementType.Equals(a) | at.IsObjectType)
{
return -1;
}
if (at.Dimension.Length != 1)
{
return -1;
}
return at.Dimension[0];
}
}
}
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