/// <summary> Given a FieldDoc object, stores the values used
/// to sort the given document. These values are not the raw
/// values out of the index, but the internal representation
/// of them. This is so the given search hit can be collated
/// by a MultiSearcher with other search hits.
/// </summary>
/// <param name="doc"> The FieldDoc to store sort values into.
/// </param>
/// <returns> The same FieldDoc passed in.
/// </returns>
/// <seealso cref="Searchable#Search(Query,Filter,int,Sort)">
/// </seealso>
internal virtual FieldDoc FillFields(FieldDoc doc)
{
int n = comparators.Length;
System.IComparable[] fields = new System.IComparable[n];
for (int i = 0; i < n; ++i)
{
fields[i] = comparators[i].SortValue(doc);
}
doc.fields = fields;
if (maxscore > 1.0f)
{
doc.score /= maxscore; // normalize scores
}
return(doc);
}
/// <summary> Given a FieldDoc object, stores the values used
/// to sort the given document. These values are not the raw
/// values out of the index, but the internal representation
/// of them. This is so the given search hit can be collated
/// by a MultiSearcher with other search hits.
/// </summary>
/// <param name="doc"> The FieldDoc to store sort values into.
/// </param>
/// <returns> The same FieldDoc passed in.
/// </returns>
/// <seealso cref="Searchable#Search(Query,Filter,int,Sort)">
/// </seealso>
internal virtual FieldDoc FillFields(FieldDoc doc)
{
int n = comparators.Length;
System.IComparable[] fields = new System.IComparable[n];
for (int i = 0; i < n; ++i)
fields[i] = comparators[i].SortValue(doc);
doc.fields = fields;
if (maxscore > 1.0f)
doc.score /= maxscore; // normalize scores
return doc;
}
/// <summary> Returns whether <code>a</code> is less relevant than <code>b</code>.</summary>
/// <param name="a">ScoreDoc
/// </param>
/// <param name="b">ScoreDoc
/// </param>
/// <returns> <code>true</code> if document <code>a</code> should be sorted after document <code>b</code>.
/// </returns>
public override bool LessThan(System.Object a, System.Object b)
{
FieldDoc docA = (FieldDoc)a;
FieldDoc docB = (FieldDoc)b;
int n = fields.Length;
int c = 0;
for (int i = 0; i < n && c == 0; ++i)
{
int type = fields[i].GetType();
if (fields[i].GetReverse())
{
switch (type)
{
case SortField.SCORE:
float r1 = (float)((System.Single)docA.fields[i]);
float r2 = (float)((System.Single)docB.fields[i]);
if (r1 < r2)
{
c = -1;
}
if (r1 > r2)
{
c = 1;
}
break;
case SortField.DOC:
case SortField.INT:
int i1 = ((System.Int32)docA.fields[i]);
int i2 = ((System.Int32)docB.fields[i]);
if (i1 > i2)
{
c = -1;
}
if (i1 < i2)
{
c = 1;
}
break;
case SortField.STRING:
System.String s1 = (System.String)docA.fields[i];
System.String s2 = (System.String)docB.fields[i];
if (s2 == null)
{
c = -1;
}
// could be null if there are
else if (s1 == null)
{
c = 1;
}
// no terms in the given Field
else if (fields[i].GetLocale() == null)
{
c = String.CompareOrdinal(s2, s1);
}
else
{
c = collators[i].Compare(s2.ToString(), s1.ToString());
}
break;
case SortField.FLOAT:
float f1 = (float)((System.Single)docA.fields[i]);
float f2 = (float)((System.Single)docB.fields[i]);
if (f1 > f2)
{
c = -1;
}
if (f1 < f2)
{
c = 1;
}
break;
case SortField.CUSTOM:
c = docB.fields[i].CompareTo(docA.fields[i]);
break;
case SortField.AUTO:
// we cannot handle this - even if we determine the type of object (Float or
// Integer), we don't necessarily know how to compare them (both SCORE and
// FLOAT both contain floats, but are sorted opposite of each other). Before
// we get here, each AUTO should have been replaced with its actual value.
throw new System.SystemException("FieldDocSortedHitQueue cannot use an AUTO SortField");
default:
throw new System.SystemException("invalid SortField type: " + type);
}
}
else
{
switch (type)
{
case SortField.SCORE:
float r1 = (float)((System.Single)docA.fields[i]);
float r2 = (float)((System.Single)docB.fields[i]);
if (r1 > r2)
{
c = -1;
}
if (r1 < r2)
{
c = 1;
}
break;
case SortField.DOC:
case SortField.INT:
int i1 = ((System.Int32)docA.fields[i]);
int i2 = ((System.Int32)docB.fields[i]);
if (i1 < i2)
{
c = -1;
}
if (i1 > i2)
{
c = 1;
}
break;
case SortField.STRING:
System.String s1 = (System.String)docA.fields[i];
System.String s2 = (System.String)docB.fields[i];
// null values need to be sorted first, because of how FieldCache.getStringIndex()
// works - in that routine, any documents without a value in the given Field are
// put first.
if (s1 == null)
{
c = -1;
}
// could be null if there are
else if (s2 == null)
{
c = 1;
}
// no terms in the given Field
else if (fields[i].GetLocale() == null)
{
c = String.CompareOrdinal(s1, s2);
}
else
{
c = collators[i].Compare(s1.ToString(), s2.ToString());
}
break;
case SortField.FLOAT:
float f1 = (float)((System.Single)docA.fields[i]);
float f2 = (float)((System.Single)docB.fields[i]);
if (f1 < f2)
{
c = -1;
}
if (f1 > f2)
{
c = 1;
}
break;
case SortField.CUSTOM:
c = docA.fields[i].CompareTo(docB.fields[i]);
break;
case SortField.AUTO:
// we cannot handle this - even if we determine the type of object (Float or
// Integer), we don't necessarily know how to compare them (both SCORE and
// FLOAT both contain floats, but are sorted opposite of each other). Before
// we get here, each AUTO should have been replaced with its actual value.
throw new System.SystemException("FieldDocSortedHitQueue cannot use an AUTO SortField");
default:
throw new System.SystemException("invalid SortField type: " + type);
}
}
}
return(c > 0);
}