public override Query Rewrite(Monodoc.Lucene.Net.Index.IndexReader reader)
{
BooleanQuery query = new BooleanQuery();
TermEnum enumerator = reader.Terms(prefix);
try
{
System.String prefixText = prefix.Text();
System.String prefixField = prefix.Field();
do
{
Term term = enumerator.Term();
if (term != null && term.Text().StartsWith(prefixText) && (System.Object) term.Field() == (System.Object) prefixField)
{
TermQuery tq = new TermQuery(term); // found a match
tq.SetBoost(GetBoost()); // set the boost
query.Add(tq, false, false); // add to query
//System.out.println("added " + term);
}
else
{
break;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
return query;
}
/// <summary> FIXME: Describe <code>rewrite</code> method here.
///
/// </summary>
/// <param name="reader">an <code>Monodoc.Lucene.Net.Index.IndexReader</code> value
/// </param>
/// <returns> a <code>Query</code> value
/// </returns>
/// <exception cref=""> IOException if an error occurs
/// </exception>
public override Query Rewrite(Monodoc.Lucene.Net.Index.IndexReader reader)
{
BooleanQuery query = new BooleanQuery();
TermEnum enumerator = reader.Terms(lowerTerm);
try
{
bool checkLower = false;
if (!inclusive)
// make adjustments to set to exclusive
checkLower = true;
System.String testField = GetField();
do
{
Term term = enumerator.Term();
if (term != null && (System.Object) term.Field() == (System.Object) testField)
{
if (!checkLower || String.CompareOrdinal(term.Text(), lowerTerm.Text()) > 0)
{
checkLower = false;
if (upperTerm != null)
{
int compare = String.CompareOrdinal(upperTerm.Text(), term.Text());
/* if beyond the upper term, or is exclusive and
* this is equal to the upper term, break out */
if ((compare < 0) || (!inclusive && compare == 0))
break;
}
TermQuery tq = new TermQuery(term); // found a match
tq.SetBoost(GetBoost()); // set the boost
query.Add(tq, false, false); // add to query
}
}
else
{
break;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
return query;
}
/// <summary> Creates a new <code>WildcardTermEnum</code>. Passing in a
/// {@link Monodoc.Lucene.Net.Index.Term Term} that does not contain a
/// <code>WILDCARD_CHAR</code> will cause an exception to be thrown.
/// </summary>
public WildcardTermEnum(Monodoc.Lucene.Net.Index.IndexReader reader, Term term):base()
{
searchTerm = term;
field = searchTerm.Field();
text = searchTerm.Text();
int sidx = text.IndexOf((System.Char) WILDCARD_STRING);
int cidx = text.IndexOf((System.Char) WILDCARD_CHAR);
int idx = sidx;
if (idx == - 1)
{
idx = cidx;
}
else if (cidx >= 0)
{
idx = System.Math.Min(idx, cidx);
}
pre = searchTerm.Text().Substring(0, (idx) - (0));
preLen = pre.Length;
text = text.Substring(preLen);
SetEnum(reader.Terms(new Term(searchTerm.Field(), pre)));
}
/// <summary> Constructor for enumeration of all terms from specified <code>reader</code> which share a prefix of
/// length <code>prefixLength</code> with <code>term</code> and which have a fuzzy similarity >
/// <code>minSimilarity</code>.
///
/// </summary>
/// <param name="reader">Delivers terms.
/// </param>
/// <param name="term">Pattern term.
/// </param>
/// <param name="minSimilarity">Minimum required similarity for terms from the reader. Default value is 0.5f.
/// </param>
/// <param name="prefixLength">Length of required common prefix. Default value is 0.
/// </param>
/// <throws> IOException </throws>
public FuzzyTermEnum(Monodoc.Lucene.Net.Index.IndexReader reader, Term term, float minSimilarity, int prefixLength):base()
{
InitBlock();
minimumSimilarity = minSimilarity;
scale_factor = 1.0f / (1.0f - minimumSimilarity);
searchTerm = term;
field = searchTerm.Field();
text = searchTerm.Text();
textlen = text.Length;
if (prefixLength > 0 && prefixLength < textlen)
{
this.prefixLength = prefixLength;
prefix = text.Substring(0, (prefixLength) - (0));
text = text.Substring(prefixLength);
textlen = text.Length;
}
SetEnum(reader.Terms(new Term(searchTerm.Field(), prefix)));
}
/// <summary> Returns a BitSet with true for documents which should be
/// permitted in search results, and false for those that should
/// not.
/// </summary>
public override System.Collections.BitArray Bits(Monodoc.Lucene.Net.Index.IndexReader reader)
{
System.Collections.BitArray bits = new System.Collections.BitArray((reader.MaxDoc() % 64 == 0?reader.MaxDoc() / 64:reader.MaxDoc() / 64 + 1) * 64);
TermEnum enumerator = reader.Terms(new Term(field, start));
TermDocs termDocs = reader.TermDocs();
if (enumerator.Term() == null)
{
return bits;
}
try
{
Term stop = new Term(field, end);
while (enumerator.Term().CompareTo(stop) <= 0)
{
termDocs.Seek(enumerator.Term());
while (termDocs.Next())
{
bits.Set(termDocs.Doc(), true);
}
if (!enumerator.Next())
{
break;
}
}
}
finally
{
enumerator.Close();
termDocs.Close();
}
return bits;
}
// inherit javadocs
public virtual System.IComparable[] GetCustom(Monodoc.Lucene.Net.Index.IndexReader reader, System.String field, SortComparator comparator)
{
field = String.Intern(field);
System.Object ret = Lookup(reader, field, comparator);
if (ret == null)
{
System.IComparable[] retArray = new System.IComparable[reader.MaxDoc()];
if (retArray.Length > 0)
{
TermDocs termDocs = reader.TermDocs();
TermEnum termEnum = reader.Terms(new Term(field, ""));
try
{
if (termEnum.Term() == null)
{
throw new System.SystemException("no terms in Field " + field);
}
do
{
Term term = termEnum.Term();
if ((System.Object) term.Field() != (System.Object) field)
break;
System.IComparable termval = comparator.GetComparable(term.Text());
termDocs.Seek(termEnum);
while (termDocs.Next())
{
retArray[termDocs.Doc()] = termval;
}
}
while (termEnum.Next());
}
finally
{
termDocs.Close();
termEnum.Close();
}
}
Store(reader, field, SortField.CUSTOM, retArray);
return retArray;
}
return (System.IComparable[]) ret;
}
/// <summary>The pattern used to detect integer values in a Field </summary>
/// <summary>removed for java 1.3 compatibility
/// protected static final Pattern pIntegers = Pattern.compile ("[0-9\\-]+");
///
/// </summary>
/// <summary>The pattern used to detect float values in a Field </summary>
/// <summary> removed for java 1.3 compatibility
/// protected static final Object pFloats = Pattern.compile ("[0-9+\\-\\.eEfFdD]+");
/// </summary>
// inherit javadocs
public virtual System.Object GetAuto(Monodoc.Lucene.Net.Index.IndexReader reader, System.String field)
{
field = String.Intern(field);
System.Object ret = Lookup(reader, field, SortField.AUTO);
if (ret == null)
{
TermEnum enumerator = reader.Terms(new Term(field, ""));
try
{
Term term = enumerator.Term();
if (term == null)
{
throw new System.SystemException("no terms in Field " + field + " - cannot determine sort type");
}
if ((System.Object) term.Field() == (System.Object) field)
{
System.String termtext = term.Text().Trim();
/// <summary> Java 1.4 level code:
/// if (pIntegers.matcher(termtext).matches())
/// return IntegerSortedHitQueue.comparator (reader, enumerator, Field);
/// else if (pFloats.matcher(termtext).matches())
/// return FloatSortedHitQueue.comparator (reader, enumerator, Field);
/// </summary>
// Java 1.3 level code:
try
{
System.Int32.Parse(termtext);
ret = GetInts(reader, field);
}
catch (System.FormatException nfe1)
{
try
{
System.Single.Parse(termtext);
ret = GetFloats(reader, field);
}
catch (System.FormatException nfe2)
{
ret = GetStringIndex(reader, field);
}
}
if (ret != null)
{
Store(reader, field, SortField.AUTO, ret);
}
}
else
{
throw new System.SystemException("Field \"" + field + "\" does not appear to be indexed");
}
}
finally
{
enumerator.Close();
}
}
return ret;
}
// inherit javadocs
public virtual StringIndex GetStringIndex(Monodoc.Lucene.Net.Index.IndexReader reader, System.String field)
{
field = String.Intern(field);
System.Object ret = Lookup(reader, field, Monodoc.Lucene.Net.Search.FieldCache_Fields.STRING_INDEX);
if (ret == null)
{
int[] retArray = new int[reader.MaxDoc()];
System.String[] mterms = new System.String[reader.MaxDoc() + 1];
if (retArray.Length > 0)
{
TermDocs termDocs = reader.TermDocs();
TermEnum termEnum = reader.Terms(new Term(field, ""));
int t = 0; // current term number
// an entry for documents that have no terms in this Field
// should a document with no terms be at top or bottom?
// this puts them at the top - if it is changed, FieldDocSortedHitQueue
// needs to change as well.
mterms[t++] = null;
try
{
if (termEnum.Term() == null)
{
throw new System.SystemException("no terms in Field " + field);
}
do
{
Term term = termEnum.Term();
if ((System.Object) term.Field() != (System.Object) field)
break;
// store term text
// we expect that there is at most one term per document
if (t >= mterms.Length)
throw new System.SystemException("there are more terms than documents in Field \"" + field + "\"");
mterms[t] = term.Text();
termDocs.Seek(termEnum);
while (termDocs.Next())
{
retArray[termDocs.Doc()] = t;
}
t++;
}
while (termEnum.Next());
}
finally
{
termDocs.Close();
termEnum.Close();
}
if (t == 0)
{
// if there are no terms, make the term array
// have a single null entry
mterms = new System.String[1];
}
else if (t < mterms.Length)
{
// if there are less terms than documents,
// trim off the dead array space
System.String[] terms = new System.String[t];
Array.Copy(mterms, 0, terms, 0, t);
mterms = terms;
}
}
StringIndex value_Renamed = new StringIndex(retArray, mterms);
Store(reader, field, Monodoc.Lucene.Net.Search.FieldCache_Fields.STRING_INDEX, value_Renamed);
return value_Renamed;
}
return (StringIndex) ret;
}
// inherit javadocs
public virtual float[] GetFloats(Monodoc.Lucene.Net.Index.IndexReader reader, System.String field)
{
field = String.Intern(field);
System.Object ret = Lookup(reader, field, SortField.FLOAT);
if (ret == null)
{
float[] retArray = new float[reader.MaxDoc()];
if (retArray.Length > 0)
{
TermDocs termDocs = reader.TermDocs();
TermEnum termEnum = reader.Terms(new Term(field, ""));
try
{
if (termEnum.Term() == null)
{
throw new System.SystemException("no terms in Field " + field);
}
do
{
Term term = termEnum.Term();
if ((System.Object) term.Field() != (System.Object) field)
break;
float termval;
try
{
termval = SupportClass.Single.Parse(term.Text());
}
catch (Exception e)
{
termval = 0;
}
termDocs.Seek(termEnum);
while (termDocs.Next())
{
retArray[termDocs.Doc()] = termval;
}
}
while (termEnum.Next());
}
finally
{
termDocs.Close();
termEnum.Close();
}
}
Store(reader, field, SortField.FLOAT, retArray);
return retArray;
}
return (float[]) ret;
}