parquet-column/src/main/java/org/apache/parquet/column/values/factory/DefaultV1ValuesWriterFactory.java [49:73]:
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  @Override
  public ValuesWriter newValuesWriter(ColumnDescriptor descriptor) {
    switch (descriptor.getType()) {
      case BOOLEAN:
        return getBooleanValuesWriter();
      case FIXED_LEN_BYTE_ARRAY:
        return getFixedLenByteArrayValuesWriter(descriptor);
      case BINARY:
        return getBinaryValuesWriter(descriptor);
      case INT32:
        return getInt32ValuesWriter(descriptor);
      case INT64:
        return getInt64ValuesWriter(descriptor);
      case INT96:
        return getInt96ValuesWriter(descriptor);
      case DOUBLE:
        return getDoubleValuesWriter(descriptor);
      case FLOAT:
        return getFloatValuesWriter(descriptor);
      default:
        throw new IllegalArgumentException("Unknown type " + descriptor.getType());
    }
  }

  private ValuesWriter getBooleanValuesWriter() {
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parquet-column/src/main/java/org/apache/parquet/column/values/factory/DefaultV2ValuesWriterFactory.java [53:77]:
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  @Override
  public ValuesWriter newValuesWriter(ColumnDescriptor descriptor) {
    switch (descriptor.getType()) {
      case BOOLEAN:
        return getBooleanValuesWriter();
      case FIXED_LEN_BYTE_ARRAY:
        return getFixedLenByteArrayValuesWriter(descriptor);
      case BINARY:
        return getBinaryValuesWriter(descriptor);
      case INT32:
        return getInt32ValuesWriter(descriptor);
      case INT64:
        return getInt64ValuesWriter(descriptor);
      case INT96:
        return getInt96ValuesWriter(descriptor);
      case DOUBLE:
        return getDoubleValuesWriter(descriptor);
      case FLOAT:
        return getFloatValuesWriter(descriptor);
      default:
        throw new IllegalArgumentException("Unknown type " + descriptor.getType());
    }
  }

  private ValuesWriter getBooleanValuesWriter() {
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