org.apache.parquet.column.values.deltalengthbytearray

Class DeltaLengthByteArrayValuesReader

java.lang.Object

org.apache.parquet.column.values.ValuesReader

org.apache.parquet.column.values.deltalengthbytearray.DeltaLengthByteArrayValuesReader

public class DeltaLengthByteArrayValuesReader
extends ValuesReader

Reads binary data written by DeltaLengthByteArrayValuesWriter

Constructor Summary

Constructors

Constructor and Description
DeltaLengthByteArrayValuesReader()

Method Summary

Modifier and Type	Method and Description
void	initFromPage(int valueCount, ByteBufferInputStream stream) Called to initialize the column reader from a part of a page.
Binary	readBytes()
void	skip() Skips the next value in the page
void	skip(int n) Skips the next n values in the page

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

getNextOffset, initFromPage, initFromPage, readBoolean, readDouble, readFloat, readInteger, readLong, readValueDictionaryId, updateNextOffset

Methods inherited from class java.lang.Object

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

Constructor Detail

DeltaLengthByteArrayValuesReader

public DeltaLengthByteArrayValuesReader()

Method Detail

initFromPage

public void initFromPage(int valueCount,
                         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:

valueCount - 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

readBytes

public Binary readBytes()

Overrides:

readBytes in class ValuesReader

Returns:

the next Binary 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

skip

public void skip(int n)

Description copied from class: ValuesReader

Skips the next n values in the page

Overrides:

skip in class ValuesReader

Parameters:

n - the number of values to be skipped