nl.cwi.monetdb.embedded.mapping

Class NullMappings

java.lang.Object

nl.cwi.monetdb.embedded.mapping.NullMappings

public final class NullMappings
extends Object

Helper Class to find the null values mapping between MonetDB and Java.

Author:

Pedro Ferreira

Method Summary

Modifier and Type	Method and Description
static boolean	checkByteIsNull(byte value) Tests if a byte is a null value.
static boolean	checkDoubleIsNull(double value) Tests if a double is a null value.
static boolean	checkFloatIsNull(float value) Tests if a float is a null value.
static boolean	checkIntIsNull(int value) Tests if an integer is a null value.
static boolean	checkLongIsNull(long value) Tests if a long is a null value.
static <T> boolean	checkObjectIsNull(T value) Tests if an object is a null value.
static boolean	checkShortIsNull(short value) Tests if a short is a null value.
static byte	getBooleanNullConstant() Gets MonetDB's boolean null constant.
static byte	getByteNullConstant() Gets MonetDB's byte null constant.
static double	getDoubleNullConstant() Gets MonetDB's double null constant.
static float	getFloatNullConstant() Gets MonetDB's float null constant.
static int	getIntNullConstant() Gets MonetDB's int null constant.
static long	getLongNullConstant() Gets MonetDB's long null constant.
static <T> T	getObjectNullConstant() A null pointer returning method.
static short	getShortNullConstant() Gets MonetDB's short null constant.

Methods inherited from class java.lang.Object

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

Method Detail

getBooleanNullConstant

public static byte getBooleanNullConstant()

Gets MonetDB's boolean null constant.

Returns:

MonetDB's boolean null constant

getByteNullConstant

public static byte getByteNullConstant()

Gets MonetDB's byte null constant.

Returns:

MonetDB's byte null constant

checkByteIsNull

public static boolean checkByteIsNull(byte value)

Tests if a byte is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getShortNullConstant

public static short getShortNullConstant()

Gets MonetDB's short null constant.

Returns:

MonetDB's short null constant

checkShortIsNull

public static boolean checkShortIsNull(short value)

Tests if a short is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getIntNullConstant

public static int getIntNullConstant()

Gets MonetDB's int null constant.

Returns:

MonetDB's int null constant

checkIntIsNull

public static boolean checkIntIsNull(int value)

Tests if an integer is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getLongNullConstant

public static long getLongNullConstant()

Gets MonetDB's long null constant.

Returns:

MonetDB's long null constant

checkLongIsNull

public static boolean checkLongIsNull(long value)

Tests if a long is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getFloatNullConstant

public static float getFloatNullConstant()

Gets MonetDB's float null constant.

Returns:

MonetDB's float null constant

checkFloatIsNull

public static boolean checkFloatIsNull(float value)

Tests if a float is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getDoubleNullConstant

public static double getDoubleNullConstant()

Gets MonetDB's double null constant.

Returns:

MonetDB's double null constant

checkDoubleIsNull

public static boolean checkDoubleIsNull(double value)

Tests if a double is a null value.

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null

getObjectNullConstant

public static <T> T getObjectNullConstant()

A null pointer returning method.

Type Parameters:

T - The Java class of the mapped MonetDB column

Returns:

A null pointer

checkObjectIsNull

public static <T> boolean checkObjectIsNull(T value)

Tests if an object is a null value.

Type Parameters:

T - The Java class of the mapped MonetDB column

Parameters:

value - The value to test

Returns:

A boolean indicating if the value is null