org.apache.ignite.internal.processors.query.h2.database

Class InlineIndexHelper

java.lang.Object

org.apache.ignite.internal.processors.query.h2.database.InlineIndexHelper

public class InlineIndexHelper
extends Object

Helper class for in-page indexes.

Field Summary

Fields

Modifier and Type	Field and Description
static List<Integer>	AVAILABLE_TYPES
static int	CANT_BE_COMPARE Value for comparison meaning 'Not enough information to compare'.

Constructor Summary

Constructors

Constructor and Description
InlineIndexHelper(String colName, int type, int colIdx, int sortType, CompareMode compareMode)

Method Summary

Modifier and Type	Method and Description
protected boolean	canRelyOnCompare(int c, Value shortVal, Value v2)
static void	clearCurrentInlineIndexes() Clears current context.
String	colName()
int	columnIndex()
int	compare(long pageAddr, int off, int maxSize, Value v, Comparator<Value> comp)
static int	fixSort(int c, int sortType) Perform sort order correction.
int	fullSize(long pageAddr, int off)
Value	get(long pageAddr, int off, int maxSize)
static List<InlineIndexHelper>	getCurrentInlineIndexes()
int	inlineSizeOf(Value val) Calculate size to inline given value.
protected boolean	isValueFull(long pageAddr, int off)
static String	nameTypeBycode(int typeCode)
int	put(long pageAddr, int off, Value val, int maxSize)
static void	setCurrentInlineIndexes(List<InlineIndexHelper> inlineIdxs) Sets page context for current thread.
short	size()
int	sortType()
static byte[]	trimUTF8(byte[] bytes, int limit) Convert String to byte[] with size limit, according to UTF-8 encoding.
int	type()

Methods inherited from class java.lang.Object

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

Field Detail

CANT_BE_COMPARE

public static final int CANT_BE_COMPARE

Value for comparison meaning 'Not enough information to compare'.

See Also:

Constant Field Values

AVAILABLE_TYPES

public static final List<Integer> AVAILABLE_TYPES

Constructor Detail

InlineIndexHelper

public InlineIndexHelper(String colName,
                         int type,
                         int colIdx,
                         int sortType,
                         CompareMode compareMode)

Parameters:

colName - Column name.

type - Index type (see Value).

colIdx - Index column index.

sortType - Column sort type (see IndexColumn#sortType).

compareMode - Compare mode.

Method Detail

colName

public String colName()

Returns:

Column name

type

public int type()

Returns:

Index type.

columnIndex

public int columnIndex()

Returns:

Column index.

sortType

public int sortType()

Returns:

Sort type.

getCurrentInlineIndexes

public static List<InlineIndexHelper> getCurrentInlineIndexes()

Returns:

Page context for current thread.

setCurrentInlineIndexes

public static void setCurrentInlineIndexes(List<InlineIndexHelper> inlineIdxs)

Sets page context for current thread.

clearCurrentInlineIndexes

public static void clearCurrentInlineIndexes()

Clears current context.

size

public short size()

Returns:

Value size.

fullSize

public int fullSize(long pageAddr,
                    int off)

Parameters:

pageAddr - Page address.

off - Offset.

Returns:

Full size in page.

get

public Value get(long pageAddr,
                 int off,
                 int maxSize)

Parameters:

pageAddr - Page address.

off - Offset.

Returns:

Value.

isValueFull

protected boolean isValueFull(long pageAddr,
                              int off)

Parameters:

pageAddr - Page address.

off - Offset.

Returns:

True if string is not truncated on save.

compare

public int compare(long pageAddr,
                   int off,
                   int maxSize,
                   Value v,
                   Comparator<Value> comp)

Parameters:

pageAddr - Page address.

off - Offset.

maxSize - Maximum size to read.

v - Value to compare.

comp - Comparator.

Returns:

Compare result ( CANT_BE_COMPARE means we can't compare).

inlineSizeOf

public int inlineSizeOf(Value val)

Calculate size to inline given value.

Parameters:

val - Value to calculate inline size.

Returns:

Calculated inline size for given value.

put

public int put(long pageAddr,
               int off,
               Value val,
               int maxSize)

Parameters:

pageAddr - Page address.

off - Offset.

val - Value.

Returns:

NUmber of bytes saved.

trimUTF8

public static byte[] trimUTF8(byte[] bytes,
                              int limit)

Convert String to byte[] with size limit, according to UTF-8 encoding.

Parameters:

bytes - byte[].

limit - Size limit.

Returns:

byte[].

canRelyOnCompare

protected boolean canRelyOnCompare(int c,
                                   Value shortVal,
                                   Value v2)

Parameters:

c - Compare result.

shortVal - Short value.

v2 - Second value;

Returns:

true if we can rely on compare result.

fixSort

public static int fixSort(int c,
                          int sortType)

Perform sort order correction.

Parameters:

c - Compare result.

sortType - Sort type.

Returns:

Fixed compare result.

nameTypeBycode

public static String nameTypeBycode(int typeCode)

Parameters:

typeCode - Type code.

Returns:

Name.