How to use

hasDictionarySupport

method

in

org.apache.parquet.io.api.PrimitiveConverter

@Override
public boolean hasDictionarySupport() {
 return wrapped.hasDictionarySupport();
}

@Override
public boolean hasDictionarySupport() {
  return super.hasDictionarySupport();
}

try {
 this.dictionary = dictionaryPage.getEncoding().initDictionary(path, dictionaryPage);
 if (converter.hasDictionarySupport()) {
  converter.setDictionary(dictionary);

try {
 this.dictionary = dictionaryPage.getEncoding().initDictionary(path, dictionaryPage);
 if (converter.hasDictionarySupport()) {
  converter.setDictionary(dictionary);

private void initDataReader(Encoding dataEncoding, ByteBufferInputStream in, int valueCount) {
 ValuesReader previousReader = this.dataColumn;
 this.currentEncoding = dataEncoding;
 this.pageValueCount = valueCount;
 this.endOfPageValueCount = readValues + pageValueCount;
 if (dataEncoding.usesDictionary()) {
  if (dictionary == null) {
   throw new ParquetDecodingException(
     "could not read page in col " + path + " as the dictionary was missing for encoding " + dataEncoding);
  }
  this.dataColumn = dataEncoding.getDictionaryBasedValuesReader(path, VALUES, dictionary);
 } else {
  this.dataColumn = dataEncoding.getValuesReader(path, VALUES);
 }
 if (dataEncoding.usesDictionary() && converter.hasDictionarySupport()) {
  bindToDictionary(dictionary);
 } else {
  bind(path.getType());
 }
 try {
  dataColumn.initFromPage(pageValueCount, in);
 } catch (IOException e) {
  throw new ParquetDecodingException("could not read page in col " + path, e);
 }
 if (CorruptDeltaByteArrays.requiresSequentialReads(writerVersion, dataEncoding) &&
   previousReader != null && previousReader instanceof RequiresPreviousReader) {
  // previous reader can only be set if reading sequentially
  ((RequiresPreviousReader) dataColumn).setPreviousReader(previousReader);
 }
}

private void initDataReader(Encoding dataEncoding, ByteBufferInputStream in, int valueCount) {
 ValuesReader previousReader = this.dataColumn;
 this.currentEncoding = dataEncoding;
 this.pageValueCount = valueCount;
 this.endOfPageValueCount = readValues + pageValueCount;
 if (dataEncoding.usesDictionary()) {
  if (dictionary == null) {
   throw new ParquetDecodingException(
     "could not read page in col " + path + " as the dictionary was missing for encoding " + dataEncoding);
  }
  this.dataColumn = dataEncoding.getDictionaryBasedValuesReader(path, VALUES, dictionary);
 } else {
  this.dataColumn = dataEncoding.getValuesReader(path, VALUES);
 }
 if (dataEncoding.usesDictionary() && converter.hasDictionarySupport()) {
  bindToDictionary(dictionary);
 } else {
  bind(path.getType());
 }
 try {
  dataColumn.initFromPage(pageValueCount, in);
 } catch (IOException e) {
  throw new ParquetDecodingException("could not read page in col " + path, e);
 }
 if (CorruptDeltaByteArrays.requiresSequentialReads(writerVersion, dataEncoding) &&
   previousReader != null && previousReader instanceof RequiresPreviousReader) {
  // previous reader can only be set if reading sequentially
  ((RequiresPreviousReader) dataColumn).setPreviousReader(previousReader);
 }
}