public DynamicExpressionData(
OperatorBuilder topOperator,
ParameterExpression[] orderedParameters)
{
OgExpressionStringValue = topOperator.ToString();
var builderQueue = new Queue <OperatorBuilder>();
builderQueue.Enqueue(topOperator);
while (builderQueue.Count > 0)
{
var nextNode = builderQueue.Dequeue();
if (nextNode.type == OperatorType.CONSTANT_VALUE)
{
definitionList.Add(new OperatorDefinition
{
operatorType = OperatorType.CONSTANT_VALUE,
nodeValue = nextNode.nodeValue
});
}
else if (nextNode.type == OperatorType.PARAMETER_VALUE)
{
var paramIndex = Array.IndexOf(orderedParameters, nextNode.parameter);
definitionList.Add(new OperatorDefinition
{
operatorType = OperatorType.PARAMETER_VALUE,
parameterIndex = paramIndex
});
}
else if (nextNode.IsUnary)
{
var rhsIndex = definitionList.Count + builderQueue.Count + 1;
definitionList.Add(new OperatorDefinition
{
operatorType = nextNode.type,
rhs = (ushort)rhsIndex
});
builderQueue.Enqueue(nextNode.rhs);
}
else if (nextNode.IsBinary)
{
var lhsIndex = definitionList.Count + builderQueue.Count + 1;
var rhsIndex = definitionList.Count + builderQueue.Count + 2;
definitionList.Add(new OperatorDefinition
{
operatorType = nextNode.type,
lhs = (ushort)lhsIndex,
rhs = (ushort)rhsIndex
});
builderQueue.Enqueue(nextNode.lhs);
builderQueue.Enqueue(nextNode.rhs);
}
else
{
throw new Exception("unrecognized node type");
}
}
}
public override string ToString()
{
if (type == OperatorType.CONSTANT_VALUE)
{
return(nodeValue.ToString("f1"));
}
if (type == OperatorType.PARAMETER_VALUE)
{
return($"PARAMAT({parameter})");
}
var str = Enum.GetName(typeof(OperatorType), type) + "(";
if (lhs != null)
{
str += lhs.ToString() + ", ";
}
if (rhs != null)
{
str += rhs.ToString();
}
str += ")";
return(str);
}