/// <summary> Allows redefinition of sort fields if they are <code>null</code>.
/// This is to handle the case using ParallelMultiSearcher where the
/// original list contains AUTO and we don't know the actual sort
/// type until the values come back. The fields can only be set once.
/// This method is thread safe.
/// </summary>
/// <param name="">fields
/// </param>
internal virtual void SetFields(SortField[] fields)
{
lock (this)
{
if (this.fields == null)
{
this.fields = fields;
this.collators = HasCollators(fields);
}
}
}
/// <summary>Creates one of these objects.</summary>
/// <param name="totalHits"> Total number of hits for the query.
/// </param>
/// <param name="scoreDocs"> The top hits for the query.
/// </param>
/// <param name="fields"> The sort criteria used to find the top hits.
/// </param>
internal TopFieldDocs(int totalHits, ScoreDoc[] scoreDocs, SortField[] fields):base(totalHits, scoreDocs)
{
this.fields = fields;
}
/// <summary>Sets the sort to the given criteria in succession. </summary>
public virtual void SetSort(SortField[] fields)
{
this.fields = fields;
}
/// <summary>Sets the sort to the given criteria. </summary>
public virtual void SetSort(SortField field)
{
this.fields = new SortField[]{field};
}
/// <summary>Sets the sort to the terms in each Field in succession. </summary>
public virtual void SetSort(System.String[] fieldnames)
{
int n = fieldnames.Length;
SortField[] nfields = new SortField[n];
for (int i = 0; i < n; ++i)
{
nfields[i] = new SortField(fieldnames[i], SortField.AUTO);
}
fields = nfields;
}
/// <summary>Sets the sort to the terms in <code>Field</code> possibly in reverse,
/// then by index order (document number).
/// </summary>
public virtual void SetSort(System.String field, bool reverse)
{
SortField[] nfields = new SortField[]{new SortField(field, SortField.AUTO, reverse), SortField.FIELD_DOC};
fields = nfields;
}
/// <summary>Sorts in succession by the criteria in each SortField. </summary>
public Sort(SortField[] fields)
{
SetSort(fields);
}
/// <summary>Sorts by the criteria in the given SortField. </summary>
public Sort(SortField field)
{
SetSort(field);
}
/// <summary> Creates a hit queue sorted by the given list of fields.</summary>
/// <param name="reader"> Index to use.
/// </param>
/// <param name="fields">Field names, in priority order (highest priority first). Cannot be <code>null</code> or empty.
/// </param>
/// <param name="size"> The number of hits to retain. Must be greater than zero.
/// </param>
/// <throws> IOException </throws>
internal FieldSortedHitQueue(Monodoc.Lucene.Net.Index.IndexReader reader, SortField[] fields, int size)
{
int n = fields.Length;
comparators = new ScoreDocComparator[n];
this.fields = new SortField[n];
for (int i = 0; i < n; ++i)
{
System.String fieldname = fields[i].GetField();
comparators[i] = GetCachedComparator(reader, fieldname, fields[i].GetType(), fields[i].GetLocale(), fields[i].GetFactory());
this.fields[i] = new SortField(fieldname, comparators[i].SortType(), fields[i].GetReverse());
}
Initialize(size);
}
/// <summary>Sets the sort to the given criteria. </summary>
public virtual void SetSort(SortField field)
{
this.fields = new SortField[] { field };
}
/// <summary>Sets the sort to the terms in <code>Field</code> possibly in reverse,
/// then by index order (document number).
/// </summary>
public virtual void SetSort(System.String field, bool reverse)
{
SortField[] nfields = new SortField[] { new SortField(field, SortField.AUTO, reverse), SortField.FIELD_DOC };
fields = nfields;
}
/// <summary>Sorts by the criteria in the given SortField. </summary>
public Sort(SortField field)
{
SetSort(field);
}
/// <summary>Returns an array of collators, possibly <code>null</code>. The collators
/// correspond to any SortFields which were given a specific locale.
/// </summary>
/// <param name="fields">Array of sort fields.
/// </param>
/// <returns> Array, possibly <code>null</code>.
/// </returns>
private System.Globalization.CompareInfo[] HasCollators(SortField[] fields)
{
if (fields == null)
return null;
System.Globalization.CompareInfo[] ret = new System.Globalization.CompareInfo[fields.Length];
for (int i = 0; i < fields.Length; ++i)
{
System.Globalization.CultureInfo locale = fields[i].GetLocale();
if (locale != null)
ret[i] = locale.CompareInfo;
}
return ret;
}
/// <summary> Creates a hit queue sorted by the given list of fields.</summary>
/// <param name="fields">Field names, in priority order (highest priority first).
/// </param>
/// <param name="size"> The number of hits to retain. Must be greater than zero.
/// </param>
/// <throws> IOException </throws>
internal FieldDocSortedHitQueue(SortField[] fields, int size)
{
this.fields = fields;
this.collators = HasCollators(fields);
Initialize(size);
}