How to use

writeOptionalString

method

in

org.elasticsearch.common.io.stream.StreamOutput

@Override
public void writeTo(StreamOutput out) throws IOException {
  out.writeString(this.id);
  out.writeOptionalString(this.relocationId);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeOptionalString(format);
  boolean hasGapPolicy = gapPolicy != null;
  out.writeBoolean(hasGapPolicy);
  if (hasGapPolicy) {
    gapPolicy.writeTo(out);
  }
  out.writeOptionalString(units);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  out.writeString(index);
  out.writeOptionalString(type);
  out.writeString(id);
  out.writeOptionalString(routing);
  out.writeOptionalString(parent);
  out.writeOptionalStringArray(storedFields);
  out.writeLong(version);
  out.writeByte(versionType.getValue());
  out.writeOptionalWriteable(fetchSourceContext);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  if (supplier != null) {
    throw new IllegalStateException("supplier must be null, can't serialize suppliers, missing a rewriteAndFetch?");
  }
  out.writeString(fieldName);
  boolean hasShape = shape != null;
  out.writeBoolean(hasShape);
  if (hasShape) {
    out.writeNamedWriteable(shape);
  } else {
    out.writeOptionalString(indexedShapeId);
    out.writeOptionalString(indexedShapeType);
    out.writeOptionalString(indexedShapeIndex);
    out.writeOptionalString(indexedShapePath);
    if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
      out.writeOptionalString(indexedShapeRouting);
    } else if (indexedShapeRouting != null) {
      throw new IllegalStateException("indexed shape routing cannot be serialized to older nodes");
    }
  }
  relation.writeTo(out);
  out.writeOptionalWriteable(strategy);
  out.writeBoolean(ignoreUnmapped);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeString(type);
  out.writeString(id);
  out.writeOptionalString(routing);
  out.writeOptionalString(parent);
  out.writeOptionalString(preference);
  out.writeBoolean(refresh);
  out.writeOptionalStringArray(storedFields);
  out.writeBoolean(realtime);
  out.writeByte(versionType.getValue());
  out.writeLong(version);
  out.writeOptionalWriteable(fetchSourceContext);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeStringArrayNullable(indices);
  indicesOptions.writeIndicesOptions(out);
  out.writeOptionalString(type);
  out.writeString(source);
  out.writeBoolean(updateAllTypes);
  out.writeOptionalWriteable(concreteIndex);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeVInt(indices.length);
  for (String index : indices) {
    out.writeString(index);
  }
  out.writeOptionalString(routing);
  out.writeOptionalString(preference);
  if (out.getVersion().onOrBefore(Version.V_5_1_1)) {
    //types
    out.writeStringArray(Strings.EMPTY_ARRAY);
  }
  indicesOptions.writeIndicesOptions(out);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeStringArray(text);
  out.writeOptionalString(analyzer);
  out.writeOptionalWriteable(tokenizer);
  out.writeList(tokenFilters);
  out.writeList(charFilters);
  out.writeOptionalString(field);
  out.writeBoolean(explain);
  out.writeStringArray(attributes);
  if (out.getVersion().onOrAfter(Version.V_6_0_0_beta1)) {
    out.writeOptionalString(normalizer);
  }
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
    out.writeOptionalString(index);
  } else {
    out.writeString(index);
  }
  if (out.getVersion().onOrAfter(Version.V_5_4_0)) {
    out.writeInt(shard);
  }
  out.writeBoolean(valid);
  out.writeOptionalString(explanation);
  out.writeOptionalString(error);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeString(fieldName);
  out.writeString(value);
  out.writeOptionalString(rewrite);
}

  @Override
  public void writeTo(StreamOutput out) throws IOException {
    super.writeTo(out);
    out.writeBoolean(valid);
    out.writeOptionalString(explanation);
    out.writeOptionalString(error);
  }
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeString(snapshot);
  out.writeString(repository);
  out.writeStringArray(indices);
  indicesOptions.writeIndicesOptions(out);
  out.writeOptionalString(renamePattern);
  out.writeOptionalString(renameReplacement);
  out.writeBoolean(waitForCompletion);
  out.writeBoolean(includeGlobalState);
  out.writeBoolean(partial);
  out.writeBoolean(includeAliases);
  writeSettingsToStream(settings, out);
  writeSettingsToStream(indexSettings, out);
  out.writeStringArray(ignoreIndexSettings);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeByte(searchType.id());
  out.writeVInt(indices.length);
  for (String index : indices) {
    out.writeString(index);
  }
  out.writeOptionalString(routing);
  out.writeOptionalString(preference);
  out.writeOptionalWriteable(scroll);
  out.writeOptionalWriteable(source);
  out.writeStringArray(types);
  indicesOptions.writeIndicesOptions(out);
  out.writeOptionalBoolean(requestCache);
  out.writeVInt(batchedReduceSize);
  if (out.getVersion().onOrAfter(Version.V_5_6_0)) {
    out.writeVInt(maxConcurrentShardRequests);
    out.writeVInt(preFilterShardSize);
  }
  if (out.getVersion().onOrAfter(Version.V_6_3_0)) {
    out.writeOptionalBoolean(allowPartialSearchResults);
  }        
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  super.writeTo(out);
  out.writeString(type);
  out.writeString(id);
  out.writeOptionalString(routing);
  out.writeOptionalString(preference);
  out.writeNamedWriteable(query);
  filteringAlias.writeTo(out);
  out.writeOptionalStringArray(storedFields);
  out.writeOptionalWriteable(fetchSourceContext);
  out.writeVLong(nowInMillis);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeString(this.fieldName);
  out.writeGenericValue(this.text);
  highFreqOperator.writeTo(out);
  lowFreqOperator.writeTo(out);
  out.writeOptionalString(analyzer);
  out.writeOptionalString(lowFreqMinimumShouldMatch);
  out.writeOptionalString(highFreqMinimumShouldMatch);
  if (out.getVersion().before(Version.V_6_0_0_alpha1)) {
    out.writeBoolean(true); // disable_coord
  }
  out.writeFloat(cutoffFrequency);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeString(fieldName);
  out.writeString(value);
  out.writeOptionalString(rewrite);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeOptionalString(encoder);
  out.writeBoolean(useExplicitFieldOrder);
  out.writeList(fields);
}

@Override
public void writeTo(StreamOutput out) throws IOException {
  out.writeOptionalString(index);
  out.writeOptionalString(type);
  out.writeBoolean(doc != null);
  if (doc != null) {
    out.writeGenericValue(doc);
    if (out.getVersion().onOrAfter(Version.V_5_3_0)) {
      out.writeEnum(xContentType);
    }
  } else {
    out.writeString(id);
  }
  out.writeOptionalStringArray(fields);
  out.writeGenericValue(perFieldAnalyzer);
  out.writeOptionalString(routing);
  out.writeLong(version);
  versionType.writeTo(out);
}

@Override
protected void doWriteTo(StreamOutput out) throws IOException {
  out.writeString(this.fieldName);
  out.writeGenericValue(this.value);
  this.fuzziness.writeTo(out);
  out.writeVInt(this.prefixLength);
  out.writeVInt(this.maxExpansions);
  out.writeBoolean(this.transpositions);
  out.writeOptionalString(this.rewrite);
}

@Override
public final void writeTo(StreamOutput out) throws IOException {
  out.writeString(field);
  out.writeOptionalString(text);
  out.writeOptionalString(prefix);
  out.writeOptionalString(regex);
  out.writeOptionalString(analyzer);
  out.writeOptionalVInt(size);
  out.writeOptionalVInt(shardSize);
  doWriteTo(out);
}