Examples of org.apache.lucene.index.DocTermOrds$OrdWrappedTermsEnum

org.apache.lucene.index.DocTermOrds
This class enables fast access to multiple term ords for a specified field across all docIDs. Like FieldCache, it uninverts the index and holds a packed data structure in RAM to enable fast access. Unlike FieldCache, it can handle multi-valued fields, and, it does not hold the term bytes in RAM. Rather, you must obtain a TermsEnum from the {@link #getOrdTermsEnum}method, and then seek-by-ord to get the term's bytes. While normally term ords are type long, in this API they are int as the internal representation here cannot address more than MAX_INT unique terms. Also, typically this class is used on fields with relatively few unique terms vs the number of documents. In addition, there is an internal limit (16 MB) on how many bytes each chunk of documents may consume. If you trip this limit you'll hit an IllegalStateException. Deleted documents are skipped during uninversion, and if you look them up you'll get 0 ords. The returned per-document ords do not retain their original order in the document. Instead they are returned in sorted (by ord, ie term's BytesRef comparator) order. They are also de-dup'd (ie if doc has same term more than once in this field, you'll only get that ord back once). This class tests whether the provided reader is able to retrieve terms by ord (ie, it's single segment, and it uses an ord-capable terms index). If not, this class will create its own term index internally, allowing to create a wrapped TermsEnum that can handle ord. The {@link #getOrdTermsEnum} method then provides thiswrapped enum, if necessary. The RAM consumption of this class can be high! @lucene.experimental

      FieldCache.DEFAULT.getDocTermOrds(ar, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    Bits bits = FieldCache.DEFAULT.getDocsWithField(ar, "binary");
    assertTrue(bits.get(0));
    
    // Sorted type: can be retrieved via getTerms(), getTermsIndex(), getDocTermOrds()
    try {
      FieldCache.DEFAULT.getInts(ar, "sorted", false);
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "sorted");
      fail();
    } catch (IllegalStateException expected) {}
    
    binary = FieldCache.DEFAULT.getTerms(ar, "sorted", true);
    binary.get(0, scratch);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedDocValues sorted = FieldCache.DEFAULT.getTermsIndex(ar, "sorted");
    assertEquals(0, sorted.getOrd(0));
    assertEquals(1, sorted.getValueCount());
    sorted.get(0, scratch);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedSetDocValues sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sorted");
    sortedSet.setDocument(0);
    assertEquals(0, sortedSet.nextOrd());
    assertEquals(SortedSetDocValues.NO_MORE_ORDS, sortedSet.nextOrd());
    assertEquals(1, sortedSet.getValueCount());
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "sorted");
    assertTrue(bits.get(0));
    
    // Numeric type: can be retrieved via getInts() and so on
    Ints numeric = FieldCache.DEFAULT.getInts(ar, "numeric", false);
    assertEquals(42, numeric.get(0));
    
    try {
      FieldCache.DEFAULT.getTerms(ar, "numeric", true);
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getTermsIndex(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getDocTermOrds(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "numeric");
    assertTrue(bits.get(0));
    
    // SortedSet type: can be retrieved via getDocTermOrds() 
    if (defaultCodecSupportsSortedSet()) {
      try {
        FieldCache.DEFAULT.getInts(ar, "sortedset", false);
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTerms(ar, "sortedset", true);
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTermsIndex(ar, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
      
      try {
        new DocTermOrds(ar, null, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
    
      sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sortedset");
      sortedSet.setDocument(0);

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      throw new IllegalStateException("Type mismatch: " + field + " was indexed as " + info.getDocValuesType());
    } else if (!info.isIndexed()) {
      return SortedSetDocValues.EMPTY;
    }
    
    DocTermOrds dto = (DocTermOrds) caches.get(DocTermOrds.class).get(reader, new CacheKey(field, null), false);
    return dto.iterator(reader);
  }

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    }


    @Override
    protected Object createValue(AtomicReader reader, CacheKey key, boolean setDocsWithField /* ignored */)
        throws IOException {
      return new DocTermOrds(reader, null, key.field);
    }

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      FieldCache.DEFAULT.getDocTermOrds(ar, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    Bits bits = FieldCache.DEFAULT.getDocsWithField(ar, "binary");
    assertTrue(bits.get(0));
    
    // Sorted type: can be retrieved via getTerms(), getTermsIndex(), getDocTermOrds()
    try {
      FieldCache.DEFAULT.getInts(ar, "sorted", false);
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "sorted");
      fail();
    } catch (IllegalStateException expected) {}
    
    binary = FieldCache.DEFAULT.getTerms(ar, "sorted", true);
    scratch = binary.get(0);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedDocValues sorted = FieldCache.DEFAULT.getTermsIndex(ar, "sorted");
    assertEquals(0, sorted.getOrd(0));
    assertEquals(1, sorted.getValueCount());
    scratch = sorted.get(0);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedSetDocValues sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sorted");
    sortedSet.setDocument(0);
    assertEquals(0, sortedSet.nextOrd());
    assertEquals(SortedSetDocValues.NO_MORE_ORDS, sortedSet.nextOrd());
    assertEquals(1, sortedSet.getValueCount());
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "sorted");
    assertTrue(bits.get(0));
    
    // Numeric type: can be retrieved via getInts() and so on
    Ints numeric = FieldCache.DEFAULT.getInts(ar, "numeric", false);
    assertEquals(42, numeric.get(0));
    
    try {
      FieldCache.DEFAULT.getTerms(ar, "numeric", true);
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getTermsIndex(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getDocTermOrds(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "numeric");
    assertTrue(bits.get(0));
    
    // SortedSet type: can be retrieved via getDocTermOrds() 
    if (defaultCodecSupportsSortedSet()) {
      try {
        FieldCache.DEFAULT.getInts(ar, "sortedset", false);
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTerms(ar, "sortedset", true);
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTermsIndex(ar, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
      
      try {
        new DocTermOrds(ar, null, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
    
      sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sortedset");
      sortedSet.setDocument(0);

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    }


    @Override
    protected Accountable createValue(AtomicReader reader, CacheKey key, boolean setDocsWithField /* ignored */)
        throws IOException {
      return new DocTermOrds(reader, null, key.field);
    }

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      throw new IllegalStateException("Type mismatch: " + field + " was indexed as " + info.getDocValuesType());
    } else if (!info.isIndexed()) {
      return DocValues.emptySortedSet();
    }
    
    DocTermOrds dto = (DocTermOrds) caches.get(DocTermOrds.class).get(reader, new CacheKey(field, null), false);
    return dto.iterator(reader);
  }

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    }


    @Override
    protected Object createValue(AtomicReader reader, CacheKey key, boolean setDocsWithField /* ignored */)
        throws IOException {
      return new DocTermOrds(reader, null, key.field);
    }

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      throw new IllegalStateException("Type mismatch: " + field + " was indexed as " + info.getDocValuesType());
    } else if (!info.isIndexed()) {
      return SortedSetDocValues.EMPTY;
    }
    
    DocTermOrds dto = (DocTermOrds) caches.get(DocTermOrds.class).get(reader, new CacheKey(field, null), false);
    return dto.iterator(reader);
  }

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      FieldCache.DEFAULT.getDocTermOrds(ar, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "binary");
      fail();
    } catch (IllegalStateException expected) {}
    
    Bits bits = FieldCache.DEFAULT.getDocsWithField(ar, "binary");
    assertTrue(bits instanceof Bits.MatchAllBits);
    
    // Sorted type: can be retrieved via getTerms(), getTermsIndex(), getDocTermOrds()
    try {
      FieldCache.DEFAULT.getInts(ar, "sorted", false);
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "sorted");
      fail();
    } catch (IllegalStateException expected) {}
    
    binary = FieldCache.DEFAULT.getTerms(ar, "sorted");
    binary.get(0, scratch);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedDocValues sorted = FieldCache.DEFAULT.getTermsIndex(ar, "sorted");
    assertEquals(0, sorted.getOrd(0));
    assertEquals(1, sorted.getValueCount());
    sorted.get(0, scratch);
    assertEquals("sorted value", scratch.utf8ToString());
    
    SortedSetDocValues sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sorted");
    sortedSet.setDocument(0);
    assertEquals(0, sortedSet.nextOrd());
    assertEquals(SortedSetDocValues.NO_MORE_ORDS, sortedSet.nextOrd());
    assertEquals(1, sortedSet.getValueCount());
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "sorted");
    assertTrue(bits instanceof Bits.MatchAllBits);
    
    // Numeric type: can be retrieved via getInts() and so on
    Ints numeric = FieldCache.DEFAULT.getInts(ar, "numeric", false);
    assertEquals(42, numeric.get(0));
    
    try {
      FieldCache.DEFAULT.getTerms(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getTermsIndex(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      FieldCache.DEFAULT.getDocTermOrds(ar, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    try {
      new DocTermOrds(ar, null, "numeric");
      fail();
    } catch (IllegalStateException expected) {}
    
    bits = FieldCache.DEFAULT.getDocsWithField(ar, "numeric");
    assertTrue(bits instanceof Bits.MatchAllBits);
    
    // SortedSet type: can be retrieved via getDocTermOrds() 
    if (defaultCodecSupportsSortedSet()) {
      try {
        FieldCache.DEFAULT.getInts(ar, "sortedset", false);
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTerms(ar, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
    
      try {
        FieldCache.DEFAULT.getTermsIndex(ar, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
      
      try {
        new DocTermOrds(ar, null, "sortedset");
        fail();
      } catch (IllegalStateException expected) {}
    
      sortedSet = FieldCache.DEFAULT.getDocTermOrds(ar, "sortedset");
      sortedSet.setDocument(0);

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    }


    @Override
    protected Object createValue(AtomicReader reader, CacheKey key, boolean setDocsWithField /* ignored */)
        throws IOException {
      return new DocTermOrds(reader, null, key.field);
    }

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