Package org.apache.cassandra.db.marshal

Class FloatType

java.lang.Object

org.apache.cassandra.db.marshal.AbstractType<T>

org.apache.cassandra.db.marshal.NumberType<java.lang.Float>

org.apache.cassandra.db.marshal.FloatType

All Implemented Interfaces:

java.util.Comparator<java.nio.ByteBuffer>, AssignmentTestable

public class FloatType
extends NumberType<java.lang.Float>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.db.marshal.AbstractType

AbstractType.ComparisonType

Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable

AssignmentTestable.TestResult

Field Summary

Fields

Modifier and Type	Field	Description
static FloatType	instance

Fields inherited from class org.apache.cassandra.db.marshal.AbstractType

comparatorSet, comparisonType, isByteOrderComparable, reverseComparator

Method Summary

Modifier and Type	Method	Description
java.nio.ByteBuffer	add(NumberType<?> leftType, java.nio.ByteBuffer left, NumberType<?> rightType, java.nio.ByteBuffer right)	Adds the left argument to the right one.
CQL3Type	asCQL3Type()
<VL,VR> int	compareCustom(VL left, ValueAccessor<VL> accessorL, VR right, ValueAccessor<VR> accessorR)	Implement IFF ComparisonType is CUSTOM Compares the byte representation of two instances of this class, for types where this cannot be done by simple in-order comparison of the unsigned bytes Standard Java compare semantics
java.nio.ByteBuffer	divide(NumberType<?> leftType, java.nio.ByteBuffer left, NumberType<?> rightType, java.nio.ByteBuffer right)	Divides the left argument by the right one.
Term	fromJSONObject(java.lang.Object parsed)	Given a parsed JSON string, return a byte representation of the object.
java.nio.ByteBuffer	fromString(java.lang.String source)	get a byte representation of the given string.
TypeSerializer<java.lang.Float>	getSerializer()
boolean	isEmptyValueMeaningless()	Returns true for types where empty should be handled like null like Int32Type.
boolean	isFloatingPoint()	Checks if this type support floating point numbers.
java.nio.ByteBuffer	mod(NumberType<?> leftType, java.nio.ByteBuffer left, NumberType<?> rightType, java.nio.ByteBuffer right)	Return the remainder.
java.nio.ByteBuffer	multiply(NumberType<?> leftType, java.nio.ByteBuffer left, NumberType<?> rightType, java.nio.ByteBuffer right)	Multiplies the left argument with the right one.
java.nio.ByteBuffer	negate(java.nio.ByteBuffer input)	Negates the argument.
java.nio.ByteBuffer	substract(NumberType<?> leftType, java.nio.ByteBuffer left, NumberType<?> rightType, java.nio.ByteBuffer right)	Substracts the left argument from the right one.
protected double	toDouble(java.nio.ByteBuffer value)	Converts the specified value into a double if allowed.
protected float	toFloat(java.nio.ByteBuffer value)	Converts the specified value into a float if allowed.
protected int	toInt(java.nio.ByteBuffer value)	Converts the specified value into an int if allowed.
java.lang.String	toJSONString(java.nio.ByteBuffer buffer, ProtocolVersion protocolVersion)	Converts the specified value into its JSON representation.
int	valueLengthIfFixed()	The length of values for this type if all values are of fixed length, -1 otherwise.

Methods inherited from class org.apache.cassandra.db.marshal.NumberType

toBigDecimal, toBigInteger, toByte, toLong, toShort

Methods inherited from class org.apache.cassandra.db.marshal.AbstractType

asCQLTypeStringList, checkComparable, compare, compare, compareCollectionMembers, compareForCQL, compose, compose, decompose, decomposeUntyped, expandUserTypes, freeze, freezeNestedMulticellTypes, getComponents, getString, getString, getString, isCollection, isCompatibleWith, isCounter, isFreezable, isFrozenCollection, isMultiCell, isReversed, isSerializationCompatibleWith, isTuple, isUDT, isValueCompatibleWith, isValueCompatibleWithInternal, parseDefaultParameters, read, readArray, readBuffer, readBuffer, referencesDuration, referencesUserType, referencesUserType, skipValue, subTypes, testAssignment, testAssignment, toCQLString, toJSONString, toString, toString, udfType, unwrap, validate, validate, validateCellValue, validateCollectionMember, withUpdatedUserType, writeValue, writeValue, writtenLength, writtenLength

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

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

Field Detail

instance

public static final FloatType instance

Method Detail

isEmptyValueMeaningless

public boolean isEmptyValueMeaningless()

Description copied from class: AbstractType

Returns true for types where empty should be handled like null like Int32Type.

Overrides:

isEmptyValueMeaningless in class AbstractType<java.lang.Float>

isFloatingPoint

public boolean isFloatingPoint()

Description copied from class: NumberType

Checks if this type support floating point numbers.

Overrides:

isFloatingPoint in class NumberType<java.lang.Float>

Returns:

true if this type support floating point numbers, false otherwise.

compareCustom

public <VL,VR> int compareCustom(VL left,
                                       ValueAccessor<VL> accessorL,
                                       VR right,
                                       ValueAccessor<VR> accessorR)

Description copied from class: AbstractType

Implement IFF ComparisonType is CUSTOM Compares the byte representation of two instances of this class, for types where this cannot be done by simple in-order comparison of the unsigned bytes Standard Java compare semantics

Overrides:

compareCustom in class AbstractType<java.lang.Float>

fromString

public java.nio.ByteBuffer fromString(java.lang.String source)
                               throws MarshalException

Description copied from class: AbstractType

get a byte representation of the given string.

Specified by:

fromString in class AbstractType<java.lang.Float>

Throws:

MarshalException

fromJSONObject

public Term fromJSONObject(java.lang.Object parsed)
                    throws MarshalException

Description copied from class: AbstractType

Given a parsed JSON string, return a byte representation of the object.

Specified by:

fromJSONObject in class AbstractType<java.lang.Float>

Parameters:

parsed - the result of parsing a json string

Throws:

MarshalException

toJSONString

public java.lang.String toJSONString(java.nio.ByteBuffer buffer,
                                     ProtocolVersion protocolVersion)

Description copied from class: AbstractType

Converts the specified value into its JSON representation.

The buffer position will stay the same.

Overrides:

toJSONString in class AbstractType<java.lang.Float>

Parameters:

buffer - the value to convert

protocolVersion - the protocol version to use for the conversion

Returns:

a JSON string representing the specified value

asCQL3Type

public CQL3Type asCQL3Type()

Overrides:

asCQL3Type in class AbstractType<java.lang.Float>

getSerializer

public TypeSerializer<java.lang.Float> getSerializer()

Specified by:

getSerializer in class AbstractType<java.lang.Float>

valueLengthIfFixed

public int valueLengthIfFixed()

Description copied from class: AbstractType

The length of values for this type if all values are of fixed length, -1 otherwise.

Overrides:

valueLengthIfFixed in class AbstractType<java.lang.Float>

toInt

protected int toInt(java.nio.ByteBuffer value)

Description copied from class: NumberType

Converts the specified value into an int if allowed.

Overrides:

toInt in class NumberType<java.lang.Float>

Parameters:

value - the value to convert

Returns:

the converted value

toFloat

protected float toFloat(java.nio.ByteBuffer value)

Description copied from class: NumberType

Converts the specified value into a float if allowed.

Overrides:

toFloat in class NumberType<java.lang.Float>

Parameters:

value - the value to convert

Returns:

the converted value

toDouble

protected double toDouble(java.nio.ByteBuffer value)

Description copied from class: NumberType

Converts the specified value into a double if allowed.

Overrides:

toDouble in class NumberType<java.lang.Float>

Parameters:

value - the value to convert

Returns:

the converted value

add

public java.nio.ByteBuffer add(NumberType<?> leftType,
                               java.nio.ByteBuffer left,
                               NumberType<?> rightType,
                               java.nio.ByteBuffer right)

Description copied from class: NumberType

Adds the left argument to the right one.

Specified by:

add in class NumberType<java.lang.Float>

Parameters:

leftType - the type associated to the left argument

left - the left argument

rightType - the type associated to the right argument

right - the right argument

Returns:

the addition result

substract

public java.nio.ByteBuffer substract(NumberType<?> leftType,
                                     java.nio.ByteBuffer left,
                                     NumberType<?> rightType,
                                     java.nio.ByteBuffer right)

Description copied from class: NumberType

Substracts the left argument from the right one.

Specified by:

substract in class NumberType<java.lang.Float>

Parameters:

leftType - the type associated to the left argument

left - the left argument

rightType - the type associated to the right argument

right - the right argument

Returns:

the substraction result

multiply

public java.nio.ByteBuffer multiply(NumberType<?> leftType,
                                    java.nio.ByteBuffer left,
                                    NumberType<?> rightType,
                                    java.nio.ByteBuffer right)

Description copied from class: NumberType

Multiplies the left argument with the right one.

Specified by:

multiply in class NumberType<java.lang.Float>

Parameters:

leftType - the type associated to the left argument

left - the left argument

rightType - the type associated to the right argument

right - the right argument

Returns:

the multiplication result

divide

public java.nio.ByteBuffer divide(NumberType<?> leftType,
                                  java.nio.ByteBuffer left,
                                  NumberType<?> rightType,
                                  java.nio.ByteBuffer right)

Description copied from class: NumberType

Divides the left argument by the right one.

Specified by:

divide in class NumberType<java.lang.Float>

Parameters:

leftType - the type associated to the left argument

left - the left argument

rightType - the type associated to the right argument

right - the right argument

Returns:

the division result

mod

public java.nio.ByteBuffer mod(NumberType<?> leftType,
                               java.nio.ByteBuffer left,
                               NumberType<?> rightType,
                               java.nio.ByteBuffer right)

Description copied from class: NumberType

Return the remainder.

Specified by:

mod in class NumberType<java.lang.Float>

Parameters:

leftType - the type associated to the left argument

left - the left argument

rightType - the type associated to the right argument

right - the right argument

Returns:

the remainder

negate

public java.nio.ByteBuffer negate(java.nio.ByteBuffer input)

Description copied from class: NumberType

Negates the argument.

Specified by:

negate in class NumberType<java.lang.Float>

Parameters:

input - the argument to negate

Returns:

the negated argument