Class ParquetFileReader.ColumnReaderBuilder

java.lang.Object

dev.hardwood.reader.ParquetFileReader.ColumnReaderBuilder

Enclosing class:

ParquetFileReader

public static final class ParquetFileReader.ColumnReaderBuilder
extends Object

Builds a single-column ColumnReader with an optional filter.

Obtained from ParquetFileReader.buildColumnReader(String) or ParquetFileReader.buildColumnReader(int). Single-file only — multi-file readers must use ParquetFileReader.buildColumnReaders(ColumnProjection) with a projection.

ColumnReader col = file.buildColumnReader("id")
        .filter(FilterPredicate.lt("id", 1000L))
        .build();

Method Summary

Modifier and Type	Method	Description
ColumnReader	build()
ParquetFileReader.ColumnReaderBuilder	filter(FilterPredicate filter)	Apply a row-group / page-level filter predicate.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

filter

public ParquetFileReader.ColumnReaderBuilder filter(FilterPredicate filter)

Apply a row-group / page-level filter predicate. Default: no filter.

build

public ColumnReader build()