private IList <SerializableExplanation> m_details; // sub-explanations
public SerializableExplanation(Explanation explanation)
{
Value = explanation.Value;
Description = explanation.Description;
Explanation[] details = explanation.GetDetails();
if (details == null)
{
return;
}
foreach (Explanation exp in details)
{
AddDetail(new SerializableExplanation(exp));
}
}
private void AddNode(TreeNode tn, Explanation e)
{
TreeNode node = new TreeNode(e.Value.ToString("G4") + " " + e.Description);
if (null == tn)
{
treeExplain.Nodes.Add(node);
}
else
{
tn.Nodes.Add(node);
}
Explanation[] kids = e.GetDetails();
if (kids != null && kids.Length > 0)
{
for (int i = 0; i < kids.Length; i++)
{
AddNode(node, kids[i]);
}
}
}
/*
* Assert that an explanation has the expected score, and optionally that its
* sub-details max/sum/factor match to that score.
*
* @param q String representation of the query for assertion messages
* @param doc Document ID for assertion messages
* @param score Real score value of doc with query q
* @param deep indicates whether a deep comparison of sub-Explanation details should be executed
* @param expl The Explanation to match against score
*/
public static void verifyExplanation(String q,
int doc,
float score,
bool deep,
Explanation expl)
{
float value = expl.Value;
assertEquals(q + ": score(doc=" + doc + ")=" + score +
" != explanationScore=" + value + " Explanation: " + expl,
score, value, explainToleranceDelta(score, value));
if (!deep)
{
return;
}
var detail = expl.GetDetails();
// TODO: can we improve this entire method? its really geared to work only with TF/IDF
if (expl.Description.EndsWith("computed from:"))
{
return; // something more complicated.
}
if (detail != null)
{
if (detail.Length == 1)
{
// simple containment, unless its a freq of: (which lets a query explain how the freq is calculated),
// just verify contained expl has same score
if (!expl.Description.EndsWith("with freq of:"))
{
verifyExplanation(q, doc, score, deep, detail[0]);
}
}
else
{
// explanation must either:
// - end with one of: "product of:", "sum of:", "max of:", or
// - have "max plus <x> times others" (where <x> is float).
float x = 0;
String descr = expl.Description.ToLowerInvariant();
bool productOf = descr.EndsWith("product of:");
bool sumOf = descr.EndsWith("sum of:");
bool maxOf = descr.EndsWith("max of:");
bool maxTimesOthers = false;
if (!(productOf || sumOf || maxOf))
{
// maybe 'max plus x times others'
int k1 = descr.IndexOf("max plus ");
if (k1 >= 0)
{
k1 += "max plus ".Length;
int k2 = descr.IndexOf(" ", k1);
try
{
x = float.Parse(descr.Substring(k1, k2).Trim());
if (descr.Substring(k2).Trim().Equals("times others of:"))
{
maxTimesOthers = true;
}
}
catch (FormatException e)
{
}
}
}
// TODO: this is a TERRIBLE assertion!!!!
assertTrue(
q + ": multi valued explanation description=\"" + descr
+ "\" must be 'max of plus x times others' or end with 'product of'"
+ " or 'sum of:' or 'max of:' - " + expl,
productOf || sumOf || maxOf || maxTimesOthers);
float sum = 0;
float product = 1;
float max = 0;
for (int i = 0; i < detail.Length; i++)
{
float dval = detail[i].Value;
verifyExplanation(q, doc, dval, deep, detail[i]);
product *= dval;
sum += dval;
max = Math.Max(max, dval);
}
float combined = 0;
if (productOf)
{
combined = product;
}
else if (sumOf)
{
combined = sum;
}
else if (maxOf)
{
combined = max;
}
else if (maxTimesOthers)
{
combined = max + x * (sum - max);
}
else
{
assertTrue("should never get here!", false);
}
assertEquals(q + ": actual subDetails combined==" + combined +
" != value=" + value + " Explanation: " + expl,
combined, value, explainToleranceDelta(combined, value));
}
}
}