parquet.column.page

Interface PageWriter

public interface PageWriter

a writer for all the pages of a given column chunk

Author:

Julien Le Dem

Method Summary

Methods

Modifier and Type	Method and Description
long	allocatedSize()
long	getMemSize()
String	memUsageString(String prefix)
void	writeDictionaryPage(DictionaryPage dictionaryPage) writes a dictionary page
void	writePage(BytesInput bytesInput, int valueCount, Encoding rlEncoding, Encoding dlEncoding, Encoding valuesEncoding) writes a single page

Method Detail

writePage

void writePage(BytesInput bytesInput,
             int valueCount,
             Encoding rlEncoding,
             Encoding dlEncoding,
             Encoding valuesEncoding)
               throws IOException

writes a single page

Parameters:

bytesInput - the bytes for the page

valueCount - the number of values in that page

rlEncoding - repetition level encoding

dlEncoding - definition level encoding

valuesEncoding - values encoding

Throws:

IOException

getMemSize

long getMemSize()

Returns:

the current size used in the memory buffer for that column chunk

allocatedSize

long allocatedSize()

Returns:

the allocated size for the buffer ( > getMemSize() )

writeDictionaryPage

void writeDictionaryPage(DictionaryPage dictionaryPage)
                         throws IOException

writes a dictionary page

Parameters:

dictionaryPage - the dictionary page containing the dictionary data

Throws:

IOException

memUsageString

String memUsageString(String prefix)