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; }