//-------------------------------------------------------------------------
private static Entry JoinInstancesOfEntries(Entry left, Entry right,
EntryProximity requiredProximity)
{
Entry JoinedEntry = new Entry();
JoinedEntry.DocIndex = left.DocIndex;
JoinedEntry.TfIdf = left.TfIdf + right.TfIdf;
JoinedEntry.Proximity = left.Proximity;
InstanceOffset[] joinedOffsets;
// If required proximity is Phrasal, then we need to highlight
// only those terms and show only those contexts which correspond
// to seach term instances EXACTLY in phrases found, and not
// others located elsewhere in the document.
if (requiredProximity == EntryProximity.Phrase)
{
// Assumption is made that all offsets in the entries are
// sorted in asceding order.
ArrayList tempOffsets = new ArrayList();
int leftIndex = 0, rightIndex = 0;
while (leftIndex < left.Count && rightIndex < right.Count)
{
InstanceOffset leftOff = left.Offsets[leftIndex], rightOff = right.Offsets[rightIndex];
if (ProximityEstimator.isPhraseProximity(leftOff, rightOff))
{
tempOffsets.Add(leftOff);
tempOffsets.Add(rightOff);
AddMappedInstances(tempOffsets, left.DocIndex, rightOff);
MappedInstances[HC(left.DocIndex, leftOff.OffsetNormal)] = rightOff;
}
if (leftOff.OffsetNormal < rightOff.OffsetNormal)
{
leftIndex++;
}
else
{
rightIndex++;
}
}
joinedOffsets = (InstanceOffset[])tempOffsets.ToArray(typeof(InstanceOffset));
}
else
{
joinedOffsets = new InstanceOffset[left.Count + right.Count];
left.Offsets.CopyTo(joinedOffsets, 0);
right.Offsets.CopyTo(joinedOffsets, left.Count);
}
JoinedEntry.Offsets = joinedOffsets;
return(JoinedEntry);
}
private static List <long> JoinInstancesOfEntries(List <long> left, List <long> right,
EntryProximity requiredProximity)
{
List <long> joinedList = new List <long>();
if (requiredProximity == EntryProximity.Phrase)
{
// Assumption is made that all offsets in the entries are
// sorted in asceding order.
int leftIndex = 0, rightIndex = 0;
while (leftIndex < left.Count && rightIndex < right.Count)
{
int order1 = MaskEncoder.TokenOrder(left[leftIndex]),
order2 = MaskEncoder.TokenOrder(right[rightIndex]);
if (ProximityEstimator.isPhraseProximity(order1, order2))
{
joinedList.Add(left[leftIndex]);
joinedList.Add(right[rightIndex]);
}
if (order1 < order2)
{
leftIndex++;
}
else
{
rightIndex++;
}
}
}
else
{
joinedList.AddRange(left);
joinedList.AddRange(right);
}
return(joinedList);
}
