Examples of org.apache.lucene.util.encoding.NOnesIntEncoder

org.apache.lucene.util.encoding.NOnesIntEncoder
A variation of {@link FourFlagsIntEncoder} which translates the data asfollows:
- Values ≥ 2 are trnalsated to value+1 (2 ⇒ 3, 3 ⇒ 4 and so forth).
- Any N occurrences of 1 are encoded as a single 2.
- Otherwise, each 1 is encoded as 1.
Encoding examples:
- N = 4: the data 1,1,1,1,1 is translated to: 2, 1
- N = 3: the data 1,2,3,4,1,1,1,1,5 is translated to 1,3,4,5,2,1,6
NOTE: this encoder does not support values ≤ 0 and {@link Integer#MAX_VALUE}. 0 is not supported because it's not supported by {@link FourFlagsIntEncoder} and {@link Integer#MAX_VALUE} because thisencoder translates N to N+1, which will cause an overflow and {@link Integer#MAX_VALUE} will become a negative number, which is notsupported as well.
This does not mean you cannot encode {@link Integer#MAX_VALUE}. If it is not the first value to encode, and you wrap this encoder with {@link DGapIntEncoder}, then the value that will be sent to this encoder will be MAX_VAL - prev. @lucene.experimental

  @Test
  public void testStream() throws Exception {


    CategoryListPayloadStream clps = new CategoryListPayloadStream(
        new UniqueValuesIntEncoder(new DGapIntEncoder(
            new NOnesIntEncoder(3))));


    clps.appendIntToStream(1);
    clps.appendIntToStream(10);
    clps.appendIntToStream(100);
    clps.appendIntToStream(1000);

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    encoderTest(new VInt8IntEncoder(), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new VInt8IntEncoder())), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new VInt8IntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new EightFlagsIntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new FourFlagsIntEncoder()))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(3)))), facetIDs, loopFactor);
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))), facetIDs, loopFactor);


    System.out.println();
  }

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    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new FourFlagsIntEncoder()))));
  }


  @Test
  public void testSortingUniqueDGapNOnes4() {
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))));
  }

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    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(4)))));
  }
  
  @Test
  public void testSortingUniqueDGapNOnes3() {
    encoderTest(new SortingIntEncoder(new UniqueValuesIntEncoder(new DGapIntEncoder(new NOnesIntEncoder(3)))));
  }

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Related Classes of org.apache.lucene.util.encoding.NOnesIntEncoder

org.apache.lucene.facet.index.CategoryListPayloadStreamTest

org.apache.lucene.util.encoding.EncodingSpeed

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