org.apache.ignite.internal.cache.query.index.sorted.inline.types

Class NullableInlineIndexKeyType<T extends IndexKey>

java.lang.Object

org.apache.ignite.internal.cache.query.index.sorted.inline.types.NullableInlineIndexKeyType<T>

All Implemented Interfaces:

InlineIndexKeyType

Direct Known Subclasses:

BytesInlineIndexKeyType, DateInlineIndexKeyType, NumericInlineIndexKeyType, ObjectByteArrayInlineIndexKeyType, ObjectHashInlineIndexKeyType, StringInlineIndexKeyType, StringNoCompareInlineIndexKeyType, TimeInlineIndexKeyType, TimestampInlineIndexKeyType, UuidInlineIndexKeyType

public abstract class NullableInlineIndexKeyType<T extends IndexKey>
extends Object
implements InlineIndexKeyType

Abstract inline key. Store base logic for work with inlined keys. Handle NULL values.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CANT_BE_COMPARE Value for comparison meaning 'Not enough information to compare'.
static int	COMPARE_UNSUPPORTED Value for comparison meaning 'Compare not supported for given value'.
protected short	keySize Actual size of a key without type field.
static int	VARTYPE_HEADER_SIZE Size of header for vartypes inlined values.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullableInlineIndexKeyType(IndexKeyType type, short keySize)

Method Summary

Modifier and Type	Method and Description
int	compare(long pageAddr, int off, int maxSize, IndexKey key) Compares inlined and given value.
abstract int	compare0(long pageAddr, int off, IndexKey v) Compares inlined and given value.
IndexKey	get(long pageAddr, int off, int maxSize) Restores value from inline, if possible.
protected abstract T	get0(long pageAddr, int off) Restores value from inline.
boolean	inlinedFullValue(long pageAddr, int off, int maxSize) Whether inline contains full index key.
int	inlineSize() Returns size of inlined key.
int	inlineSize(IndexKey key) Returns inline size for specified key.
int	inlineSize(long pageAddr, int off) Actual size of inline value.
protected abstract int	inlineSize0(T key) Return inlined size for specified key.
Boolean	isNull(long pageAddr, int off, int maxSize) Checks if inlined index key is null.
short	keySize()
int	put(long pageAddr, int off, IndexKey key, int maxSize) Puts given value into inline index tree.
protected abstract int	put0(long pageAddr, int off, T val, int maxSize) Puts given value into inline index tree.
static byte[]	readBytes(long pageAddr, int off) Read variable length bytearray
IndexKeyType	type() Returns type of inlined column.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.cache.query.index.sorted.inline.InlineIndexKeyType

isComparableTo

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

COMPARE_UNSUPPORTED

public static final int COMPARE_UNSUPPORTED

Value for comparison meaning 'Compare not supported for given value'.

See Also:

Constant Field Values

VARTYPE_HEADER_SIZE

public static final int VARTYPE_HEADER_SIZE

Size of header for vartypes inlined values.

See Also:

Constant Field Values

keySize

protected final short keySize

Actual size of a key without type field.

Constructor Detail

NullableInlineIndexKeyType

protected NullableInlineIndexKeyType(IndexKeyType type,
                                     short keySize)

Parameters:

type - Index key type.

keySize - Size of value stored in the key.

Method Detail

type

public IndexKeyType type()

Returns type of inlined column.

Specified by:

type in interface InlineIndexKeyType

Returns:

Column's value type.

inlineSize

public int inlineSize(long pageAddr,
                      int off)

Actual size of inline value. It returns keySize() + 1 for values with fixed size and amount of written bytes for values with variable length. Used for dynamic offset calculation by page for variable length values.

Specified by:

inlineSize in interface InlineIndexKeyType

Parameters:

pageAddr - Page address.

off - Offset.

Returns:

Returns actual size of inlined value.

inlineSize

public int inlineSize()

Returns size of inlined key. Note: system fields (e.g. type, length) are taken into account as well.

Specified by:

inlineSize in interface InlineIndexKeyType

inlineSize

public int inlineSize(IndexKey key)

Returns inline size for specified key. Note: system fields (e.g. type, length) are taken into account as well.

Specified by:

inlineSize in interface InlineIndexKeyType

get

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

Restores value from inline, if possible.

Specified by:

get in interface InlineIndexKeyType

Parameters:

pageAddr - Address of the page.

off - Offset on the page.

maxSize - Max size to read.

Returns:

Restored value or null if value can't be restored.

isNull

public Boolean isNull(long pageAddr,
                      int off,
                      int maxSize)

Checks if inlined index key is null.

Specified by:

isNull in interface InlineIndexKeyType

Parameters:

pageAddr - Page address.

off - Offset.

maxSize - Remaining inlined buffer size (max available bytes to read for the current row).

Returns:

Boolean.TRUE if index key is null, Boolean.FALSE if index key is not null, null if can't say for sure.

put

public int put(long pageAddr,
               int off,
               IndexKey key,
               int maxSize)

Puts given value into inline index tree.

Specified by:

put in interface InlineIndexKeyType

Parameters:

pageAddr - Page address.

off - Offset.

key - Index key.

maxSize - Remaining inlined buffer size (max available bytes to write for the current row).

Returns:

Amount of bytes actually stored.

keySize

public short keySize()

Specified by:

keySize in interface InlineIndexKeyType

Returns:

Size of key, in bytes. -1 means variable length of key.

put0

protected abstract int put0(long pageAddr,
                            int off,
                            T val,
                            int maxSize)

Puts given value into inline index tree.

Parameters:

pageAddr - Page address.

off - Offset.

val - Value.

maxSize - Max size.

Returns:

Amount of bytes actually stored.

get0

protected abstract T get0(long pageAddr,
                          int off)

Restores value from inline.

Parameters:

pageAddr - Page address.

off - Offset.

Returns:

Inline value.

readBytes

public static byte[] readBytes(long pageAddr,
                               int off)

Read variable length bytearray

compare

public int compare(long pageAddr,
                   int off,
                   int maxSize,
                   IndexKey key)

Compares inlined and given value.

Specified by:

compare in interface InlineIndexKeyType

Parameters:

pageAddr - Page address.

off - Offset.

maxSize - Remaining inlined buffer size (max available bytes to read for the current row).

key - Value that should be compare.

Returns:

-1, 0 or 1 if inlined value less, equal or greater than given respectively, or -2 if inlined part is not enough to compare.

compare0

public abstract int compare0(long pageAddr,
                             int off,
                             IndexKey v)

Compares inlined and given value.

Parameters:

pageAddr - Page address.

off - Offset.

v - Value that should be compare.

Returns:

-1, 0 or 1 if inlined value less, equal or greater than given respectively, CANT_BE_COMPARE if inlined part is not enough to compare, or COMPARE_UNSUPPORTED if given value can't be compared with inlined part at all.

inlineSize0

protected abstract int inlineSize0(T key)

Return inlined size for specified key.

inlinedFullValue

public boolean inlinedFullValue(long pageAddr,
                                int off,
                                int maxSize)

Whether inline contains full index key.

Specified by:

inlinedFullValue in interface InlineIndexKeyType

Parameters:

pageAddr - Page address.

off - Offset.

maxSize - Remaining inlined buffer size (max available bytes to read for the current row).

Returns:

true if inline contains full index key. Can be false for truncated variable length types.