org.apache.iotdb.tsfile.read.common.block.column

Class RunLengthEncodedColumn

java.lang.Object

org.apache.iotdb.tsfile.read.common.block.column.RunLengthEncodedColumn

All Implemented Interfaces:

Column

public class RunLengthEncodedColumn
extends Object
implements Column

Constructor Summary

Constructors

Constructor and Description
RunLengthEncodedColumn(Column value, int positionCount)

Method Summary

Modifier and Type	Method and Description
Binary	getBinary(int position) Gets a Binary at position.
boolean	getBoolean(int position) Gets a boolean at position.
TSDataType	getDataType() Get the data type.
double	getDouble(int position) Gets a double at position.
ColumnEncoding	getEncoding() Get the encoding for this column.
float	getFloat(int position) Gets a float at position.
int	getInt(int position) Gets a little endian int at position.
long	getLong(int position) Gets a little endian long at position.
Object	getObject(int position) Gets an Object at position.
int	getPositionCount() Returns the number of positions in this block.
Column	getRegion(int positionOffset, int length) Returns a column starting at the specified position and extends for the specified length.
long	getRetainedSizeInBytes() Returns the retained size of this column in memory, including over-allocations.
TsPrimitiveType	getTsPrimitiveType(int position) Gets a TsPrimitiveType at position.
Column	getValue()
boolean	isNull(int position) Is the specified position null?
boolean	mayHaveNull() Is it possible the column may have a null value? If false, the column cannot contain a null, but if true, the column may or may not have a null.
void	reverse() reverse the column
Column	subColumn(int fromIndex) This method will create a temporary view of origin column, which will reuse the array of column but with different array offset.

Methods inherited from class java.lang.Object

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

Constructor Detail

RunLengthEncodedColumn

public RunLengthEncodedColumn(Column value,
                              int positionCount)

Method Detail

getValue

public Column getValue()

getDataType

public TSDataType getDataType()

Description copied from interface: Column

Get the data type.

Specified by:

getDataType in interface Column

getEncoding

public ColumnEncoding getEncoding()

Description copied from interface: Column

Get the encoding for this column.

Specified by:

getEncoding in interface Column

getBoolean

public boolean getBoolean(int position)

Description copied from interface: Column

Gets a boolean at position.

Specified by:

getBoolean in interface Column

getInt

public int getInt(int position)

Description copied from interface: Column

Gets a little endian int at position.

Specified by:

getInt in interface Column

getLong

public long getLong(int position)

Description copied from interface: Column

Gets a little endian long at position.

Specified by:

getLong in interface Column

getFloat

public float getFloat(int position)

Description copied from interface: Column

Gets a float at position.

Specified by:

getFloat in interface Column

getDouble

public double getDouble(int position)

Description copied from interface: Column

Gets a double at position.

Specified by:

getDouble in interface Column

getBinary

public Binary getBinary(int position)

Description copied from interface: Column

Gets a Binary at position.

Specified by:

getBinary in interface Column

getObject

public Object getObject(int position)

Description copied from interface: Column

Gets an Object at position.

Specified by:

getObject in interface Column

getTsPrimitiveType

public TsPrimitiveType getTsPrimitiveType(int position)

Description copied from interface: Column

Gets a TsPrimitiveType at position.

Specified by:

getTsPrimitiveType in interface Column

mayHaveNull

public boolean mayHaveNull()

Description copied from interface: Column

Is it possible the column may have a null value? If false, the column cannot contain a null, but if true, the column may or may not have a null.

Specified by:

mayHaveNull in interface Column

isNull

public boolean isNull(int position)

Description copied from interface: Column

Is the specified position null?

Specified by:

isNull in interface Column

getPositionCount

public int getPositionCount()

Description copied from interface: Column

Returns the number of positions in this block.

Specified by:

getPositionCount in interface Column

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Description copied from interface: Column

Returns the retained size of this column in memory, including over-allocations. This method is called from the inner most execution loop and must be fast.

Specified by:

getRetainedSizeInBytes in interface Column

getRegion

public Column getRegion(int positionOffset,
                        int length)

Description copied from interface: Column

Returns a column starting at the specified position and extends for the specified length. The specified region must be entirely contained within this column.

The region can be a view over this column. If this column is released, the region column may also be released. If the region column is released, this block may also be released.

Specified by:

getRegion in interface Column

subColumn

public Column subColumn(int fromIndex)

Description copied from interface: Column

This method will create a temporary view of origin column, which will reuse the array of column but with different array offset.

Specified by:

subColumn in interface Column

reverse

public void reverse()

Description copied from interface: Column

reverse the column

Specified by:

reverse in interface Column