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

org.apache.lucene.util.encoding.IntEncoder

Encodes integers to a set {@link OutputStream}. Extending classes need to override {@link #encode(int)} to encode the value using their encodingalgorithm. The default implementation of {@link #close()} closes the set{@link OutputStream}.

The default {@link #IntEncoder() constructor} is provided for convenienceonly. One must call {@link #reInit(OutputStream)} before calling{@link #encode(int)} or {@link #close()}.

For convenience, each encoder implements {@link #createMatchingDecoder()} foreasy access to the matching decoder.

NOTE: some implementations may buffer the encoded values in memory (such as {@link IntEncoderFilter} implementations) and encoding will happenonly upon calling {@link #close()}. Therefore it is important to always call {@link #close()} on the encoder at hand.

NOTE: encoders are usually not thread safe, unless specifically documented otherwise by an implementation. @lucene.experimental

      CategoryPath categoryPath, int ordinal) throws IOException {
    CategoryListParams clParams = this.indexingParams.getCategoryListParams(categoryPath);
    String name = PartitionsUtils.partitionNameByOrdinal(indexingParams, clParams, ordinal); 
    CategoryListPayloadStream fps = payloadStreamsByName.get(name);
    if (fps == null) {
      IntEncoder encoder = clParams.createEncoder();
      fps = new CategoryListPayloadStream(encoder);
      payloadStreamsByName.put(name, fps);
    }
    return fps;
  }

  @Test
  public void testVInt8() throws Exception {
    encoderTest(new VInt8IntEncoder());
    
    // cover negative numbers;
    IntEncoder enc = new VInt8IntEncoder();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    enc.reInit(baos);
    enc.encode(-1);
    
    IntDecoder dec = enc.createMatchingDecoder();
    dec.reInit(new ByteArrayInputStream(baos.toByteArray()));
    assertEquals(-1, dec.decode());
  }

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

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