Examples of org.apache.lucene.queries.function.valuesource.ReverseOrdFieldSource

Package org.apache.lucene.queries.function.valuesource

Examples of org.apache.lucene.queries.function.valuesource.ReverseOrdFieldSource

org.apache.lucene.queries.function.valuesource.ReverseOrdFieldSource
Obtains the ordinal of the field value from the default Lucene {@link org.apache.lucene.search.FieldCache} using getTermsIndex()and reverses the order.
The native lucene index order is used to assign an ordinal value for each field value.
Field values (terms) are lexicographically ordered by unicode value, and numbered starting at 1.
Example of reverse ordinal (rord):
If there were only three field values: "apple","banana","pear"
then rord("apple")=3, rord("banana")=2, ord("pear")=1
WARNING: ord() depends on the position in an index and can thus change when other documents are inserted or deleted, or if a MultiSearcher is used.
WARNING: as of Solr 1.4, ord() and rord() can cause excess memory use since they must use a FieldCache entry at the top level reader, while sorting and function queries now use entries at the segment level. Hence sorting or using a different function query, in addition to ord()/rord() will double memory use.

    IndexSearcher s = new IndexSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }


    Query q = new FunctionQuery(vs);
    log("test: " + q);
    QueryUtils.check(random(), q, s);

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    IndexSearcher s = new IndexSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }
    Query q = new FunctionQuery(vs);
    TopDocs td = s.search(q, null, 1000);
    assertEquals("All docs should be matched!", N_DOCS, td.totalHits);
    ScoreDoc sd[] = td.scoreDocs;

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  // LUCENE-1250
  public void testEqualsNull() throws Exception {
    OrdFieldSource ofs = new OrdFieldSource("f");
    assertFalse(ofs.equals(null));
    
    ReverseOrdFieldSource rofs = new ReverseOrdFieldSource("f");
    assertFalse(rofs.equals(null));
  }

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    IndexSearcher s = newSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }


    Query q = new FunctionQuery(vs);
    log("test: " + q);
    QueryUtils.check(random(), q, s);

View Full Code Here

    IndexSearcher s = newSearcher(r);
    ValueSource vs;
    if (inOrder) {
      vs = new OrdFieldSource(field);
    } else {
      vs = new ReverseOrdFieldSource(field);
    }
    Query q = new FunctionQuery(vs);
    TopDocs td = s.search(q, null, 1000);
    assertEquals("All docs should be matched!", N_DOCS, td.totalHits);
    ScoreDoc sd[] = td.scoreDocs;

View Full Code Here

  // LUCENE-1250
  public void testEqualsNull() throws Exception {
    OrdFieldSource ofs = new OrdFieldSource("f");
    assertFalse(ofs.equals(null));
    
    ReverseOrdFieldSource rofs = new ReverseOrdFieldSource("f");
    assertFalse(rofs.equals(null));
  }

View Full Code Here

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Related Classes of org.apache.lucene.queries.function.valuesource.ReverseOrdFieldSource

org.apache.lucene.index.AtomicReader

org.apache.lucene.index.IndexReader

org.apache.lucene.index.SlowCompositeReaderWrapper

org.apache.lucene.index.SortedDocValues

org.apache.lucene.queries.function.docvalues.IntDocValues

org.apache.lucene.queries.function.TestOrdValues

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