Examples of org.apache.lucene.index.TermEnum

org.apache.lucene.index.TermEnum
Abstract class for enumerating terms.
Term enumerations are always ordered by Term.compareTo(). Each term in the enumeration is greater than all that precede it.

      Entry entry = (Entry) entryKey;
      String field = entry.field;
      SortComparator comparator = (SortComparator) entry.custom;
      final Comparable[] retArray = new Comparable[reader.maxDoc()];
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          Comparable termval = comparator.getComparable (term.text());
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } finally {
        termDocs.close();
        termEnum.close();
      }
      return retArray;
    }

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      if (parser == null) {
        return wrapper.getBytes(reader, field, FieldCache.DEFAULT_BYTE_PARSER);
      }
      final byte[] retArray = new byte[reader.maxDoc()];
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          byte termval = parser.parseByte(term.text());
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      return retArray;
    }

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      if (parser == null) {
        return wrapper.getShorts(reader, field, FieldCache.DEFAULT_SHORT_PARSER);
      }
      final short[] retArray = new short[reader.maxDoc()];
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          short termval = parser.parseShort(term.text());
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      return retArray;
    }

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          return wrapper.getInts(reader, field, NUMERIC_UTILS_INT_PARSER);      
        }
      }
      int[] retArray = null;
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          int termval = parser.parseInt(term.text());
          if (retArray == null) // late init
            retArray = new int[reader.maxDoc()];
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      if (retArray == null) // no values
        retArray = new int[reader.maxDoc()];
      return retArray;
    }

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          return wrapper.getFloats(reader, field, NUMERIC_UTILS_FLOAT_PARSER);      
        }
    }
      float[] retArray = null;
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          float termval = parser.parseFloat(term.text());
          if (retArray == null) // late init
            retArray = new float[reader.maxDoc()];
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      if (retArray == null) // no values
        retArray = new float[reader.maxDoc()];
      return retArray;
    }

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          return wrapper.getLongs(reader, field, NUMERIC_UTILS_LONG_PARSER);      
        }
      }
      long[] retArray = null;
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term(field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          long termval = parser.parseLong(term.text());
          if (retArray == null) // late init
            retArray = new long[reader.maxDoc()];
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      if (retArray == null) // no values
        retArray = new long[reader.maxDoc()];
      return retArray;
    }

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          return wrapper.getDoubles(reader, field, NUMERIC_UTILS_DOUBLE_PARSER);      
        }
      }
      double[] retArray = null;
      TermDocs termDocs = reader.termDocs();
      TermEnum termEnum = reader.terms (new Term (field));
      try {
        do {
          Term term = termEnum.term();
          if (term==null || term.field() != field) break;
          double termval = parser.parseDouble(term.text());
          if (retArray == null) // late init
            retArray = new double[reader.maxDoc()];
          termDocs.seek (termEnum);
          while (termDocs.next()) {
            retArray[termDocs.doc()] = termval;
          }
        } while (termEnum.next());
      } catch (StopFillCacheException stop) {
      } finally {
        termDocs.close();
        termEnum.close();
      }
      if (retArray == null) // no values
        retArray = new double[reader.maxDoc()];
      return retArray;
    }

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        }
      }
      final int ix = i;
      final int jx = j;
  
      return new TermEnum() {
  
        private int srtTermsIdx = ix; // index into info.sortedTerms
        private int srtFldsIdx = jx; // index into sortedFields
          
        @Override

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    LinkedList<Term> termsWithPrefix = new LinkedList<Term>();
    IndexReader ir = reader;


    // this TermEnum gives "piccadilly", "pie" and "pizza".
    String prefix = "pi";
    TermEnum te = ir.terms(new Term("body", prefix));
    do {
        if (te.term().text().startsWith(prefix))
        {
            termsWithPrefix.add(te.term());
        }
    } while (te.next());


    query1.add(termsWithPrefix.toArray(new Term[0]));
    assertEquals("body:\"blueberry (piccadilly pie pizza)\"", query1.toString());
    query2.add(termsWithPrefix.toArray(new Term[0]));
    assertEquals("body:\"strawberry (piccadilly pie pizza)\"", query2.toString());


    ScoreDoc[] result;
    result = searcher.search(query1, null, 1000).scoreDocs;
    assertEquals(2, result.length);
    result = searcher.search(query2, null, 1000).scoreDocs;
    assertEquals(0, result.length);


    // search for "blue* pizza":
    MultiPhraseQuery query3 = new MultiPhraseQuery();
    termsWithPrefix.clear();
    prefix = "blue";
    te = ir.terms(new Term("body", prefix));
    do {
        if (te.term().text().startsWith(prefix))
        {
            termsWithPrefix.add(te.term());
        }
    } while (te.next());
    query3.add(termsWithPrefix.toArray(new Term[0]));
    query3.add(new Term("body", "pizza"));


    result = searcher.search(query3, null, 1000).scoreDocs;
    assertEquals(2, result.length); // blueberry pizza, bluebird pizza

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    r.close();
    d.close();
  }


  public void termEnumTest(IndexReader r) throws Exception {
    TermEnum terms = r.terms();


    assertNull(terms.term());
    assertFalse(terms.next());


  }

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