public String Merge(NodeQueryResult result, NodeQueryResultOperand nodes_operand, NodeQueryPredicateOperand evaluation_operand)
{
String mergeReport = this.ToString() + " " + evaluation_operand.ToString() + "(" + nodes_operand.ToString() + ")";
mergeReport = mergeReport.add(result.ToString(), " ");
ResultNodes = ResultNodes.GetOperationResult(result.ResultNodes, nodes_operand);
switch (evaluation_operand)
{
case NodeQueryPredicateOperand.AND:
ResultEvaluation = ResultEvaluation && result.ResultEvaluation;
break;
case NodeQueryPredicateOperand.NOT:
ResultEvaluation = ResultEvaluation && !result.ResultEvaluation;
break;
case NodeQueryPredicateOperand.OR:
ResultEvaluation = ResultEvaluation || result.ResultEvaluation;
break;
case NodeQueryPredicateOperand.SET:
ResultEvaluation = result.ResultEvaluation;
break;
case NodeQueryPredicateOperand.IGNORE:
break;
case NodeQueryPredicateOperand.REEVAL:
ResultEvaluation = ResultNodes.Any();
break;
}
mergeReport = mergeReport.add(" => " + this.ToString(), " ");
return(mergeReport);
}
public static Dictionary <String, HtmlNode> GetOperationResult(Dictionary <String, HtmlNode> target, Dictionary <String, HtmlNode> source, NodeQueryResultOperand operand)
{
Dictionary <String, HtmlNode> output = new Dictionary <string, HtmlNode>();
List <String> overlapKeys = new List <string>();
switch (operand)
{
case NodeQueryResultOperand.APPEND:
break;
case NodeQueryResultOperand.REMOVE:
output.MergeDictionary(target);
break;
case NodeQueryResultOperand.DIFFERENCE:
case NodeQueryResultOperand.OVERLAP:
overlapKeys.AddRange(target.Keys.Where(x => source.ContainsKey(x)).ToList());
break;
default:
break;
}
switch (operand)
{
case NodeQueryResultOperand.APPEND:
output.MergeDictionary(target);
output.MergeDictionary(source);
break;
case NodeQueryResultOperand.DIFFERENCE:
foreach (String k in overlapKeys)
{
if (target.ContainsKey(k))
{
target.Remove(k);
}
if (source.ContainsKey(k))
{
source.Remove(k);
}
}
output.MergeDictionary(target);
output.MergeDictionary(source);
break;
case NodeQueryResultOperand.OVERLAP:
foreach (String k in overlapKeys)
{
if (target.ContainsKey(k))
{
output.Add(k, target[k]);
}
}
break;
case NodeQueryResultOperand.REMOVE:
output.RemoveDictionary(source.Keys);
break;
default:
break;
}
return(output);
}
public static List <HtmlNode> GetOperationResult(this List <HtmlNode> target, IEnumerable <HtmlNode> source, NodeQueryResultOperand operand)
{
if (operand == NodeQueryResultOperand.IGNORE)
{
return(target);
}
else if (operand == NodeQueryResultOperand.SET)
{
return(source.ToList());
}
var targetDict = target.GetXPathDictionary();
var sourceDict = source.GetXPathDictionary();
var outputDict = GetOperationResult(targetDict, sourceDict, operand);
return(outputDict.Values.ToList());
}
