org.apache.parquet.column.values.plain

Class BooleanPlainValuesReader

java.lang.Object

org.apache.parquet.column.values.ValuesReader

org.apache.parquet.column.values.plain.BooleanPlainValuesReader

public class BooleanPlainValuesReader
extends ValuesReader

encodes boolean for the plain encoding: one bit at a time (0 = false)

Constructor Summary

Constructors

Constructor and Description
BooleanPlainValuesReader()

Method Summary

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

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanPlainValuesReader

public BooleanPlainValuesReader()

Method Detail

readBoolean

public boolean readBoolean()

Overrides:

readBoolean in class ValuesReader

Returns:

the next boolean from the page

See Also:

ValuesReader.readBoolean()

skip

public void skip()

Skips the next value in the page

Specified by:

skip in class ValuesReader

See Also:

ValuesReader.skip()

initFromPage

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

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

See Also:

ValuesReader.initFromPage(int, ByteBufferInputStream)

getNextOffset

@Deprecated
public int getNextOffset()

Deprecated.

Description copied from class: ValuesReader

Called to return offset of the next section

Overrides:

getNextOffset in class ValuesReader

Returns:

offset of the next section