Class ValueDataType

java.lang.Object

org.h2.mvstore.type.BasicDataType<Value>

org.h2.mvstore.db.ValueDataType

All Implemented Interfaces:

Comparator<Value>, DataType<Value>, StatefulDataType<Database>

public final class ValueDataType
extends BasicDataType<Value>
implements StatefulDataType<Database>

A row type.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ValueDataType.Factory

Field Summary

Fields

Modifier and Type	Field	Description
private static final byte	ARRAY
private static final byte	BIGINT
private static final byte	BIGINT_0_7
private static final byte	BIGINT_NEG
private static final int	BINARY
private static final byte	BLOB
private static final byte	BOOLEAN_FALSE
private static final byte	BOOLEAN_TRUE
private static final byte	CHAR
private static final byte	CLOB
(package private) final CompareMode	compareMode
private static final byte	DATE
private static final int	DECFLOAT
private static final byte	DOUBLE
private static final byte	DOUBLE_0_1
private static final byte	ENUM
private static final ValueDataType.Factory	FACTORY
private static final byte	GEOMETRY
(package private) final DataHandler	handler
private static final byte	INT_0_15
private static final byte	INT_NEG
private static final byte	INTEGER
private static final byte	INTERVAL
private static final byte	JAVA_OBJECT
private static final int	JSON
private static final byte	NULL
private static final byte	NUMERIC
private static final byte	NUMERIC_0_1
private static final byte	NUMERIC_SMALL
private static final byte	NUMERIC_SMALL_0
(package private) final CastDataProvider	provider
private static final byte	REAL
private static final byte	REAL_0_1
private static final byte	ROW
private RowFactory	rowFactory
private static final byte	SMALLINT
(package private) final int[]	sortTypes
private static final byte	TIME
private static final int	TIME_TZ
private static final byte	TIMESTAMP
private static final int	TIMESTAMP_TZ
private static final byte	TIMESTAMP_TZ_OLD
private static final byte	TINYINT
private static final byte	UUID
private static final byte	VARBINARY
private static final int	VARBINARY_0_31
private static final byte	VARCHAR
private static final byte	VARCHAR_0_31
private static final byte	VARCHAR_IGNORECASE

Constructor Summary

Constructors

Constructor	Description
ValueDataType()
ValueDataType(CastDataProvider provider, CompareMode compareMode, DataHandler handler, int[] sortTypes)
ValueDataType(Database database, int[] sortTypes)

Method Summary

Modifier and Type	Method	Description
private int	compare(SearchRow a, SearchRow b)
int	compare(Value a, Value b)	Compare two keys.
int	compareValues(Value a, Value b, int sortType)	Compares the specified values.
Value[]	createStorage(int size)	Create storage object of array type to hold values
boolean	equals(Object obj)
ValueDataType.Factory	getFactory()
int	getMemory(Value v)	Calculates the amount of used memory in bytes.
RowFactory	getRowFactory()
int	hashCode()
Value	read(ByteBuffer buff)	Read an object.
private Value[]	readArrayElements(ByteBuffer buff, TypeInfo elementType)
private LobDataDatabase	readLobDataDatabase(ByteBuffer buff)
private static long	readTimestampTime(ByteBuffer buff)
private static int	readTimeZone(ByteBuffer buff)
(package private) Value	readValue(ByteBuffer buff, TypeInfo columnType)	Read a value.
private static byte[]	readVarBytes(ByteBuffer buff)
void	save(WriteBuffer buff, MetaType<Database> metaType)	Save the state.
void	setRowFactory(RowFactory rowFactory)
void	write(WriteBuffer buff, Value v)	Write an object.
private static void	writeBinary(byte type, WriteBuffer buff, Value v)
private static void	writeIntArray(WriteBuffer buff, int[] array)
static void	writeLong(WriteBuffer buff, long x)	Writes a long.
private static void	writeString(WriteBuffer buff, String s)
private static void	writeTimestampTime(WriteBuffer buff, long nanos)
private static void	writeTimeZone(WriteBuffer buff, int timeZoneOffset)

Methods inherited from class BasicDataType

binarySearch, cast, isMemoryEstimationAllowed, read, write

Methods inherited from class Object

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

Methods inherited from interface Comparator

reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Details

NULL

private static final byte NULL

See Also:

• Constant Field Values

TINYINT

private static final byte TINYINT

See Also:

• Constant Field Values

SMALLINT

private static final byte SMALLINT

See Also:

• Constant Field Values

INTEGER

private static final byte INTEGER

See Also:

• Constant Field Values

BIGINT

private static final byte BIGINT

See Also:

• Constant Field Values

NUMERIC

private static final byte NUMERIC

See Also:

• Constant Field Values

DOUBLE

private static final byte DOUBLE

See Also:

• Constant Field Values

REAL

private static final byte REAL

See Also:

• Constant Field Values

TIME

private static final byte TIME

See Also:

• Constant Field Values

DATE

private static final byte DATE

See Also:

• Constant Field Values

TIMESTAMP

private static final byte TIMESTAMP

See Also:

• Constant Field Values

VARBINARY

private static final byte VARBINARY

See Also:

• Constant Field Values

VARCHAR

private static final byte VARCHAR

See Also:

• Constant Field Values

VARCHAR_IGNORECASE

private static final byte VARCHAR_IGNORECASE

See Also:

• Constant Field Values

BLOB

private static final byte BLOB

See Also:

• Constant Field Values

CLOB

private static final byte CLOB

See Also:

• Constant Field Values

ARRAY

private static final byte ARRAY

See Also:

• Constant Field Values

JAVA_OBJECT

private static final byte JAVA_OBJECT

See Also:

• Constant Field Values

UUID

private static final byte UUID

See Also:

• Constant Field Values

CHAR

private static final byte CHAR

See Also:

• Constant Field Values

GEOMETRY

private static final byte GEOMETRY

See Also:

• Constant Field Values

TIMESTAMP_TZ_OLD

private static final byte TIMESTAMP_TZ_OLD

See Also:

• Constant Field Values

ENUM

private static final byte ENUM

See Also:

• Constant Field Values

INTERVAL

private static final byte INTERVAL

See Also:

• Constant Field Values

ROW

private static final byte ROW

See Also:

• Constant Field Values

INT_0_15

private static final byte INT_0_15

See Also:

• Constant Field Values

BIGINT_0_7

private static final byte BIGINT_0_7

See Also:

• Constant Field Values

NUMERIC_0_1

private static final byte NUMERIC_0_1

See Also:

• Constant Field Values

NUMERIC_SMALL_0

private static final byte NUMERIC_SMALL_0

See Also:

• Constant Field Values

NUMERIC_SMALL

private static final byte NUMERIC_SMALL

See Also:

• Constant Field Values

DOUBLE_0_1

private static final byte DOUBLE_0_1

See Also:

• Constant Field Values

REAL_0_1

private static final byte REAL_0_1

See Also:

• Constant Field Values

BOOLEAN_FALSE

private static final byte BOOLEAN_FALSE

See Also:

• Constant Field Values

BOOLEAN_TRUE

private static final byte BOOLEAN_TRUE

See Also:

• Constant Field Values

INT_NEG

private static final byte INT_NEG

See Also:

• Constant Field Values

BIGINT_NEG

private static final byte BIGINT_NEG

See Also:

• Constant Field Values

VARCHAR_0_31

private static final byte VARCHAR_0_31

See Also:

• Constant Field Values

VARBINARY_0_31

private static final int VARBINARY_0_31

See Also:

• Constant Field Values

JSON

private static final int JSON

See Also:

• Constant Field Values

TIMESTAMP_TZ

private static final int TIMESTAMP_TZ

See Also:

• Constant Field Values

TIME_TZ

private static final int TIME_TZ

See Also:

• Constant Field Values

BINARY

private static final int BINARY

See Also:

• Constant Field Values

DECFLOAT

private static final int DECFLOAT

See Also:

• Constant Field Values

handler

final DataHandler handler

provider

final CastDataProvider provider

compareMode

final CompareMode compareMode

sortTypes

final int[] sortTypes

rowFactory

private RowFactory rowFactory

FACTORY

private static final ValueDataType.Factory FACTORY

Constructor Details

ValueDataType

public ValueDataType()

ValueDataType

public ValueDataType(Database database,
 int[] sortTypes)

ValueDataType

public ValueDataType(CastDataProvider provider,
 CompareMode compareMode,
 DataHandler handler,
 int[] sortTypes)

Method Details

getRowFactory

public RowFactory getRowFactory()

setRowFactory

public void setRowFactory(RowFactory rowFactory)

createStorage

public Value[] createStorage(int size)

Description copied from interface: DataType

Create storage object of array type to hold values

Specified by:

createStorage in interface DataType<Value>

Parameters:

size - number of values to hold

Returns:

storage object

compare

public int compare(Value a,
 Value b)

Description copied from interface: DataType

Compare two keys.

Specified by:

compare in interface Comparator<Value>

Specified by:

compare in interface DataType<Value>

Overrides:

compare in class BasicDataType<Value>

Parameters:

a - the first key

b - the second key

Returns:

-1 if the first key is smaller, 1 if larger, and 0 if equal

compare

private int compare(SearchRow a,
 SearchRow b)

compareValues

public int compareValues(Value a,
 Value b,
 int sortType)

Compares the specified values.

Parameters:

a - the first value

b - the second value

sortType - the sorting type

Returns:

0 if equal, -1 if first value is smaller for ascending or larger for descending sort type, 1 otherwise

getMemory

public int getMemory(Value v)

Description copied from interface: DataType

Calculates the amount of used memory in bytes.

Specified by:

getMemory in interface DataType<Value>

Specified by:

getMemory in class BasicDataType<Value>

Parameters:

v - the object

Returns:

the used memory

read

public Value read(ByteBuffer buff)

Description copied from interface: DataType

Read an object.

Specified by:

read in interface DataType<Value>

Specified by:

read in class BasicDataType<Value>

Parameters:

buff - the source buffer

Returns:

the object

write

public void write(WriteBuffer buff,
 Value v)

Description copied from interface: DataType

Write an object.

Specified by:

write in interface DataType<Value>

Specified by:

write in class BasicDataType<Value>

Parameters:

buff - the target buffer

v - the value

writeBinary

private static void writeBinary(byte type,
 WriteBuffer buff,
 Value v)

writeLong

public static void writeLong(WriteBuffer buff,
 long x)

Writes a long.

Parameters:

buff - the target buffer

x - the long value

writeString

private static void writeString(WriteBuffer buff,
 String s)

writeTimestampTime

private static void writeTimestampTime(WriteBuffer buff,
 long nanos)

writeTimeZone

private static void writeTimeZone(WriteBuffer buff,
 int timeZoneOffset)

readValue

Value readValue(ByteBuffer buff,
 TypeInfo columnType)

Read a value.

Parameters:

buff - the source buffer

columnType - the data type of value, or null

Returns:

the value

readLobDataDatabase

private LobDataDatabase readLobDataDatabase(ByteBuffer buff)

readArrayElements

private Value[] readArrayElements(ByteBuffer buff,
 TypeInfo elementType)

readVarBytes

private static byte[] readVarBytes(ByteBuffer buff)

readTimestampTime

private static long readTimestampTime(ByteBuffer buff)

readTimeZone

private static int readTimeZone(ByteBuffer buff)

equals

public boolean equals(Object obj)

Specified by:

equals in interface Comparator<Value>

Overrides:

equals in class BasicDataType<Value>

hashCode

public int hashCode()

Overrides:

hashCode in class BasicDataType<Value>

save

public void save(WriteBuffer buff,
 MetaType<Database> metaType)

Description copied from interface: StatefulDataType

Save the state.

Specified by:

save in interface StatefulDataType<Database>

Parameters:

buff - the target buffer

metaType - the meta type

writeIntArray

private static void writeIntArray(WriteBuffer buff,
 int[] array)

getFactory

public ValueDataType.Factory getFactory()

Specified by:

getFactory in interface StatefulDataType<Database>