/// <summary>
/// 查找指定数目的Term
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
public TermModel[] FindTerms(int num)
{
num++;
TermInfoQueue queue = new TermInfoQueue(num);
TermEnum enum2 = open.Reader.Terms();
int count = 0;
while (enum2.Next())
{
string str = enum2.Term().Field();
if ((currentField != null) && (!str.Equals(currentField)))
{
continue;
}
if (enum2.DocFreq() > count)
{
queue.Put(new TermModel(enum2.Term(), enum2.DocFreq()));
if (queue.Size() < num)
{
continue;
}
queue.Pop();
count = ((TermModel)queue.Top()).Count;
}
}
enum2.Close();
TermModel[] modleArray = new TermModel[queue.Size()];
for (int i = 0; i < modleArray.Length; i++)
{
modleArray[(modleArray.Length - i) - 1] = (TermModel)queue.Pop();
}
return(modleArray);
}
public IEnumerable <TermInfo> GetHighFrequencyTerms(int numTerms, string[] fields)
{
if (_reader == null || fields == null)
{
return(new TermInfo[0]);
}
var termInfoQueue = new TermInfoQueue(numTerms);
var terms = _reader.Terms();
while (terms.Next())
{
var term = terms.Term();
if (termInfoQueue.Size() >= numTerms)
{
break;
}
if (fields.Length > 0)
{
// The lamda expresion is testing to see if the field that belongs to the term from lucene
// is in the list of fields we passed in
var skipField = fields.All(field => !term.Field().Equals(field));
if (skipField)
{
continue;
}
if (terms.DocFreq() > 0)
{
termInfoQueue.Add(new TermInfo(term, terms.DocFreq()));
}
}
}
var res = BuildTermInfoList(termInfoQueue);
return(res);
}
/// <summary>
/// 查找指定数目的Term
/// </summary>
/// <param name="num"></param>
/// <returns></returns>
public TermModel[] FindTerms(int num)
{
num++;
TermInfoQueue queue = new TermInfoQueue(num);
TermEnum enum2 = open.Reader.Terms();
int count = 0;
while (enum2.Next()) {
string str = enum2.Term().Field();
if ((currentField != null) && (!str.Equals(currentField))) {
continue;
}
if (enum2.DocFreq() > count) {
queue.Put(new TermModel(enum2.Term(), enum2.DocFreq()));
if (queue.Size() < num) {
continue;
}
queue.Pop();
count = ((TermModel)queue.Top()).Count;
}
}
enum2.Close();
TermModel[] modleArray = new TermModel[queue.Size()];
for (int i = 0; i < modleArray.Length; i++) {
modleArray[(modleArray.Length - i) - 1] = (TermModel)queue.Pop();
}
return modleArray;
}
