Examples of org.apache.lucene.index.Payload

org.apache.lucene.index.Payload
A Payload is metadata that can be stored together with each occurrence of a term. This metadata is stored inline in the posting list of the specific term.
To store payloads in the index a {@link TokenStream} has to be used thatproduces payload data.
Use {@link TermPositions#getPayloadLength()} and {@link TermPositions#getPayload(byte[],int)}to retrieve the payloads from the index.

          buffer[0] = (byte) (size);
          buffer[1] = (byte) (size >> 8);
          buffer[2] = (byte) (size >> 16);
          buffer[3] = (byte) (size >> 24);
          payloadAttr = (PayloadAttribute)addAttribute(PayloadAttribute.class);
          payloadAttr.setPayload(new Payload(buffer));
          termAttr = (TermAttribute)addAttribute(TermAttribute.class);
          termAttr.setTermBuffer(term.text());
          returnToken = true;
        }

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      data[--off] = (byte)(id);
      id >>>= 8;
    }
    while(id > 0);
    
    return new Payload(data, off, data.length - off);
  }

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      buf[i++] = (byte)(datum >>> 8);
      buf[i++] = (byte)(datum >>> 16);
      buf[i++] = (byte)(datum >>> 24);
    }
    
    _payload = new Payload(buf);
    _returnToken = true;
  }

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  private TypeAttribute typeAtt;


  public NumericPayloadTokenFilter(TokenStream input, float payload, String typeMatch) {
    super(input);
    //Need to encode the payload
    thePayload = new Payload(PayloadHelper.encodeFloat(payload));
    this.typeMatch = typeMatch;
    payloadAtt = addAttribute(PayloadAttribute.class);
    typeAtt = addAttribute(TypeAttribute.class);
  }

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  public final boolean incrementToken() throws IOException {
    if (input.incrementToken()) {
      byte[] data = new byte[8];
      PayloadHelper.encodeInt(offsetAtt.startOffset(), data, 0);
      PayloadHelper.encodeInt(offsetAtt.endOffset(), data, 4);
      Payload payload = new Payload(data);
      payAtt.setPayload(payload);
      return true;
    } else {
    return false;
    }

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  @Override
  public final boolean incrementToken() throws IOException {
    if (input.incrementToken()) {
      String type = typeAtt.type();
      if (type != null && type.equals("") == false) {
        payloadAtt.setPayload(new Payload(type.getBytes("UTF-8")));
      }
      return true;
    } else {
      return false;
    }

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    @Override
    public void setWeight(Token token, float weight) {
      if (weight == 1f) {
        token.setPayload(null);
      } else {
        token.setPayload(new Payload(PayloadHelper.encodeFloat(weight)));
      }
    }

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    public boolean incrementToken() throws IOException {
      
      if (input.incrementToken()) {
        if (fieldName.equals(FIELD))
        {
          payloadAtt.setPayload(new Payload(payloadField));
        }
        else if (fieldName.equals(MULTI_FIELD))
        {
          if (numSeen  % 2 == 0)
          {
            payloadAtt.setPayload(new Payload(payloadMultiField1));
          }
          else
          {
            payloadAtt.setPayload(new Payload(payloadMultiField2));
          }
          numSeen++;
        }
        return true;
      }

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      if (nextToken == null) {
        prefixExhausted = true;
      } else {
        previousPrefixToken.reinit(nextToken);
        // Make it a deep copy
        Payload p = previousPrefixToken.getPayload();
        if (p != null) {
          previousPrefixToken.setPayload((Payload) p.clone());
        }
        setCurrentToken(nextToken);
        return true;
      }
    }

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    @Override
    public boolean incrementToken() throws IOException {
      boolean hasNext = input.incrementToken();
      if (hasNext) {
        if (fieldName.equals("field")) {
          payloadAtt.setPayload(new Payload(payloadField));
        } else if (fieldName.equals("multiField")) {
          if (numSeen % 2 == 0) {
            payloadAtt.setPayload(new Payload(payloadMultiField1));
          } else {
            payloadAtt.setPayload(new Payload(payloadMultiField2));
          }
          numSeen++;
        }
        return true;
      } else {

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