org.h2.value

类 ValueReal

java.lang.Object

org.h2.value.VersionedValue<Value>

org.h2.value.Value

org.h2.value.ValueReal

所有已实现的接口:

HasSQL, Typed

public final class ValueReal
extends Value

Implementation of the REAL data type.

字段概要

字段

限定符和类型	字段和说明
static ValueReal	ONE The value 1.
static ValueReal	ZERO The value 0.
static int	ZERO_BITS Float.floatToIntBits(0f).

从类继承的字段 org.h2.value.Value

ARRAY, BIGINT, BINARY, BLOB, BOOLEAN, CHAR, CLOB, DATE, DECFLOAT, DOUBLE, EMPTY_VALUES, ENUM, GEOMETRY, INTEGER, INTERVAL_DAY, INTERVAL_DAY_TO_HOUR, INTERVAL_DAY_TO_MINUTE, INTERVAL_DAY_TO_SECOND, INTERVAL_HOUR, INTERVAL_HOUR_TO_MINUTE, INTERVAL_HOUR_TO_SECOND, INTERVAL_MINUTE, INTERVAL_MINUTE_TO_SECOND, INTERVAL_MONTH, INTERVAL_SECOND, INTERVAL_YEAR, INTERVAL_YEAR_TO_MONTH, JAVA_OBJECT, JSON, MIN_LONG_DECIMAL, NULL, NUMERIC, REAL, ROW, SMALLINT, TIME, TIME_TZ, TIMESTAMP, TIMESTAMP_TZ, TINYINT, TYPE_COUNT, UNKNOWN, UUID, VARBINARY, VARCHAR, VARCHAR_IGNORECASE

从接口继承的字段 org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

方法概要

限定符和类型	方法和说明
Value	add(Value v) Add a value and return the result.
int	compareTypeSafe(Value o, CompareMode mode, CastDataProvider provider) Compare this value against another value given that the values are of the same data type.
Value	divide(Value v, TypeInfo quotientType) Divide by a value and return the result.
boolean	equals(Object other) Check if the two values have the same hash code.
static ValueReal	get(float d) Get or create a REAL value for the given float.
BigDecimal	getBigDecimal()
double	getDouble() Returns this value as a Java double value.
float	getFloat() Returns this value as a Java float value.
int	getSignum()
StringBuilder	getSQL(StringBuilder builder, int sqlFlags) Appends the SQL statement of this object to the specified builder.
String	getString() Get the value as a string.
TypeInfo	getType() Returns the data type.
int	getValueType() Get the value type.
int	hashCode()
Value	modulus(Value v) Take the modulus with a value and return the result.
Value	multiply(Value v) Multiply with a value and return the result.
Value	negate() Return -value if this value support arithmetic operations.
Value	subtract(Value v) Subtract a value and return the result.

从类继承的方法 org.h2.value.Value

castTo, charLength, clearCache, compareTo, compareWithNull, containsNull, convertForAssignTo, convertTo, convertTo, convertTo, convertTo, convertTo, convertToAnyArray, convertToAnyRow, convertToBigint, convertToBoolean, convertToChar, convertToDate, convertToDouble, convertToEnum, convertToGeometry, convertToInt, convertToInt, convertToJavaObject, convertToReal, convertToSmallint, convertToTinyint, convertToUuid, getBoolean, getByte, getBytes, getBytesNoCopy, getHigherOrder, getInputStream, getInputStream, getInt, getLong, getMemory, getReader, getReader, getShort, getTypeName, getUnsupportedExceptionForOperation, isFalse, isTrue, octetLength, toString

从类继承的方法 org.h2.value.VersionedValue

getCommittedValue, getCurrentValue, getOperationId, isCommitted

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.h2.util.HasSQL

getSQL, getTraceSQL

字段详细资料

ZERO_BITS

public static final int ZERO_BITS

Float.floatToIntBits(0f).

另请参阅:

常量字段值

ZERO

public static final ValueReal ZERO

The value 0.

ONE

public static final ValueReal ONE

The value 1.

方法详细资料

add

public Value add(Value v)

从类复制的说明: Value

Add a value and return the result.

覆盖:

add 在类中 Value

参数:

v - the value to add

返回:

the result

subtract

public Value subtract(Value v)

从类复制的说明: Value

Subtract a value and return the result.

覆盖:

subtract 在类中 Value

参数:

v - the value to subtract

返回:

the result

negate

public Value negate()

从类复制的说明: Value

Return -value if this value support arithmetic operations.

覆盖:

negate 在类中 Value

返回:

the negative

multiply

public Value multiply(Value v)

从类复制的说明: Value

Multiply with a value and return the result.

覆盖:

multiply 在类中 Value

参数:

v - the value to multiply with

返回:

the result

divide

public Value divide(Value v,
                    TypeInfo quotientType)

从类复制的说明: Value

Divide by a value and return the result.

覆盖:

divide 在类中 Value

参数:

v - the divisor

quotientType - the type of quotient (used only to read precision and scale when applicable)

返回:

the result

modulus

public Value modulus(Value v)

从类复制的说明: Value

Take the modulus with a value and return the result.

覆盖:

modulus 在类中 Value

参数:

v - the value to take the modulus with

返回:

the result

getSQL

public StringBuilder getSQL(StringBuilder builder,
                            int sqlFlags)

从接口复制的说明: HasSQL

Appends the SQL statement of this object to the specified builder.

参数:

builder - string builder

sqlFlags - formatting flags

返回:

the specified string builder

getType

public TypeInfo getType()

从接口复制的说明: Typed

Returns the data type.

指定者:

getType 在接口中 Typed

指定者:

getType 在类中 Value

返回:

the data type

getValueType

public int getValueType()

从类复制的说明: Value

Get the value type.

指定者:

getValueType 在类中 Value

返回:

the value type

compareTypeSafe

public int compareTypeSafe(Value o,
                           CompareMode mode,
                           CastDataProvider provider)

从类复制的说明: Value

Compare this value against another value given that the values are of the same data type.

指定者:

compareTypeSafe 在类中 Value

参数:

o - the other value

mode - the compare mode

provider - the cast information provider

返回:

0 if both values are equal, -1 if the other value is smaller, and 1 otherwise

getSignum

public int getSignum()

覆盖:

getSignum 在类中 Value

getBigDecimal

public BigDecimal getBigDecimal()

覆盖:

getBigDecimal 在类中 Value

getFloat

public float getFloat()

从类复制的说明: Value

Returns this value as a Java float value.

覆盖:

getFloat 在类中 Value

返回:

value

getDouble

public double getDouble()

从类复制的说明: Value

Returns this value as a Java double value.

覆盖:

getDouble 在类中 Value

返回:

value

getString

public String getString()

从类复制的说明: Value

Get the value as a string.

指定者:

getString 在类中 Value

返回:

the string

hashCode

public int hashCode()

指定者:

hashCode 在类中 Value

get

public static ValueReal get(float d)

Get or create a REAL value for the given float.

参数:

d - the float

返回:

the value

equals

public boolean equals(Object other)

从类复制的说明: Value

Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.

指定者:

equals 在类中 Value

参数:

other - the other value

返回:

true if they are equal