/// <summary>
/// Compare two TrustMaps to determine how many of the found values per property matched,
/// to incorporate that into trust scoring.
/// </summary>
/// <param name="otherRunMap">TrustMap for the other Run we're baselining against</param>
public void CountMatchesWith(TrustMap otherRunMap)
{
foreach (TrustKey key in _map.Keys)
{
int matchCount = 0;
TrustValue ourValue = _map[key];
if (otherRunMap._map.TryGetValue(key, out TrustValue theirValue))
{
foreach (string value in ourValue.UniqueValues)
{
if (theirValue.UniqueValues.Contains(value))
{
matchCount++;
}
}
theirValue.MatchCount = matchCount;
}
ourValue.MatchCount = matchCount;
}
this.WasMatched = true;
otherRunMap.WasMatched = true;
}
public StatefulResultMatcher(IList <ExtractedResult> before, IList <ExtractedResult> after)
{
// Sort results by 'Where', then 'RuleId' for matching
_before = new List <ExtractedResult>(before);
_before.Sort(ResultMatchingComparer.Instance);
_beforeTrustMap = new TrustMap();
_beforeWhatMap = new WhatMap();
_matchingIndexFromBefore = new int[_before.Count];
Fill(_matchingIndexFromBefore, -1);
_after = new List <ExtractedResult>(after);
_after.Sort(ResultMatchingComparer.Instance);
_afterTrustMap = new TrustMap();
_afterWhatMap = new WhatMap();
_matchingIndexFromAfter = new int[_after.Count];
Fill(_matchingIndexFromAfter, -1);
}
private static void BuildMap(List <ExtractedResult> results, WhatMap whatMap, TrustMap trustMap, HashSet <string> otherRunLocations)
{
// Populate the WhatMap and TrustMap
for (int i = 0; i < results.Count; ++i)
{
ExtractedResult result = results[i];
// Find the LocationSpecifier for the Result (the first Uri or FQN also in the other Run)
string locationSpecifier = WhereComparer.LocationSpecifier(result, otherRunLocations);
foreach (WhatComponent component in WhatComparer.WhatProperties(result, locationSpecifier))
{
// Add Result attributes used as matching hints in a "bucket" for the Rule x LocationSpecifier x AttributeName
whatMap.Add(component, i);
// Track attribute usage to determine per-attribute trust
trustMap.Add(component);
}
}
}
/// <summary>
/// Match the 'What' properties of two ExtractedResults.
/// </summary>
/// <param name="right">ExtractedResult to match</param>
/// <returns>True if *any* 'What' property matches, False otherwise</returns>
public static bool MatchesWhat(ExtractedResult left, ExtractedResult right, TrustMap trustMap = null)
{
if (left?.Result == null || right?.Result == null)
{
return(false);
}
// Match Guid
if (left.Result.Guid != null)
{
if (string.Equals(left.Result.Guid, right.Result.Guid))
{
return(true);
}
// Non-Match doesn't force false, as GUIDs are often re-generated by tools.
}
// Match Fingerprints (any one match is a match)
if (left.Result.Fingerprints != null && right.Result.Fingerprints != null)
{
int correspondingFingerprintCount = 0;
foreach (KeyValuePair <string, string> fingerprint in left.Result.Fingerprints)
{
if (right.Result.Fingerprints.TryGetValue(fingerprint.Key, out string otherFingerprint))
{
correspondingFingerprintCount++;
if (string.Equals(fingerprint.Value, otherFingerprint))
{
return(true);
}
}
}
// Force non-match if there were fingerprints but none of them matched
if (correspondingFingerprintCount > 0)
{
return(false);
}
}
// Match PartialFingerprints (50% must match)
if (left.Result.PartialFingerprints != null && right.Result.PartialFingerprints != null)
{
float weightOfComparableValues = 0;
float matchWeight = 0;
foreach (KeyValuePair <string, string> fingerprint in left.Result.PartialFingerprints)
{
if (right.Result.PartialFingerprints.TryGetValue(fingerprint.Key, out string otherFingerprint))
{
float trust = trustMap?.Trust(PropertySetPartialFingerprint, fingerprint.Key) ?? TrustMap.DefaultTrust;
weightOfComparableValues += trust;
if (string.Equals(fingerprint.Value, otherFingerprint))
{
matchWeight += trust;
}
}
}
if (weightOfComparableValues > 0)
{
// Return whether at least half of the partialFingerprints matched weighted by trust
return(matchWeight * 2 >= weightOfComparableValues);
}
}
// At this point, no high confidence properties matched or failed to match
string leftMessage = GetCanonicalizedMessage(left);
string rightMessage = GetCanonicalizedMessage(right);
string leftSnippet = GetFirstSnippet(left);
string rightSnippet = GetFirstSnippet(right);
return(string.Equals(leftMessage, rightMessage) && string.Equals(leftSnippet, rightSnippet));
}
