org.apache.parquet.column.values.rle

Class RunLengthBitPackingHybridValuesReader

java.lang.Object

org.apache.parquet.column.values.ValuesReader

org.apache.parquet.column.values.rle.RunLengthBitPackingHybridValuesReader

public class RunLengthBitPackingHybridValuesReader
extends ValuesReader

This ValuesReader does all the reading in initFromPage(int, org.apache.parquet.bytes.ByteBufferInputStream) and stores the values in an in memory buffer, which is less than ideal.

Constructor Summary

Constructors

Constructor and Description
RunLengthBitPackingHybridValuesReader(int bitWidth)

Method Summary

Modifier and Type	Method and Description
void	initFromPage(int valueCountL, ByteBufferInputStream stream) Called to initialize the column reader from a part of a page.
boolean	readBoolean()
int	readInteger()
void	skip() Skips the next value in the page

Methods inherited from class org.apache.parquet.column.values.ValuesReader

getNextOffset, initFromPage, initFromPage, readBytes, readDouble, readFloat, readLong, readValueDictionaryId, skip, updateNextOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

RunLengthBitPackingHybridValuesReader

public RunLengthBitPackingHybridValuesReader(int bitWidth)

Method Detail

initFromPage

public void initFromPage(int valueCountL,
                         ByteBufferInputStream stream)
                  throws IOException

Description copied from class: ValuesReader

Called to initialize the column reader from a part of a page.

Implementations must consume all bytes from the input stream, leaving the stream ready to read the next section of data. The underlying implementation knows how much data to read, so a length is not provided.

Each page may contain several sections:

• repetition levels column
• definition levels column
• data column

Overrides:

initFromPage in class ValuesReader

Parameters:

valueCountL - count of values in this page

stream - an input stream containing the page data at the correct offset

Throws:

IOException - if there is an exception while reading from the input stream

readInteger

public int readInteger()

Overrides:

readInteger in class ValuesReader

Returns:

the next integer from the page

readBoolean

public boolean readBoolean()

Overrides:

readBoolean in class ValuesReader

Returns:

the next boolean from the page

skip

public void skip()

Description copied from class: ValuesReader

Skips the next value in the page

Specified by:

skip in class ValuesReader