Package org.apache.cassandra.db.marshal
Class UUIDType
- java.lang.Object
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- org.apache.cassandra.db.marshal.AbstractType<java.util.UUID>
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- org.apache.cassandra.db.marshal.UUIDType
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- All Implemented Interfaces:
java.util.Comparator<java.nio.ByteBuffer>
,AssignmentTestable
public class UUIDType extends AbstractType<java.util.UUID>
Compares UUIDs using the following criteria:
- if count of supplied bytes is less than 16, compare counts
- compare UUID version fields
- nil UUID is always lesser
- compare timestamps if both are time-based
- compare lexically, unsigned msb-to-lsb comparison- See Also:
- "com.fasterxml.uuid.UUIDComparator"
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.cassandra.db.marshal.AbstractType
AbstractType.ComparisonType
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Nested classes/interfaces inherited from interface org.apache.cassandra.cql3.AssignmentTestable
AssignmentTestable.TestResult
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Field Summary
Fields Modifier and Type Field Description static UUIDType
instance
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Fields inherited from class org.apache.cassandra.db.marshal.AbstractType
comparatorSet, comparisonType, isByteOrderComparable, reverseComparator
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description CQL3Type
asCQL3Type()
<VL,VR>
intcompareCustom(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 semanticsTerm
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.util.UUID>
getSerializer()
boolean
isEmptyValueMeaningless()
boolean
isValueCompatibleWithInternal(AbstractType<?> otherType)
Needed to handle ReversedType in value-compatibility checks.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.AbstractType
asCQLTypeStringList, checkComparable, compare, compare, compareCollectionMembers, compareForCQL, compose, compose, decompose, expandUserTypes, freeze, freezeNestedMulticellTypes, getComponents, getString, getString, getString, isCollection, isCompatibleWith, isCounter, isFreezable, isFrozenCollection, isMultiCell, isReversed, isTuple, isUDT, isValueCompatibleWith, parseDefaultParameters, read, readArray, readBuffer, readBuffer, referencesDuration, referencesUserType, referencesUserType, skipValue, subTypes, testAssignment, testAssignment, toJSONString, toJSONString, toString, toString, validate, validate, validateCellValue, validateCollectionMember, withUpdatedUserType, writeValue, writeValue, writtenLength, writtenLength
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Field Detail
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instance
public static final UUIDType instance
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Method Detail
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isEmptyValueMeaningless
public boolean isEmptyValueMeaningless()
Description copied from class:AbstractType
- Overrides:
isEmptyValueMeaningless
in classAbstractType<java.util.UUID>
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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 classAbstractType<java.util.UUID>
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isValueCompatibleWithInternal
public boolean isValueCompatibleWithInternal(AbstractType<?> otherType)
Description copied from class:AbstractType
Needed to handle ReversedType in value-compatibility checks. Subclasses should implement this instead of isValueCompatibleWith().- Overrides:
isValueCompatibleWithInternal
in classAbstractType<java.util.UUID>
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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 classAbstractType<java.util.UUID>
- Throws:
MarshalException
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asCQL3Type
public CQL3Type asCQL3Type()
- Overrides:
asCQL3Type
in classAbstractType<java.util.UUID>
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getSerializer
public TypeSerializer<java.util.UUID> getSerializer()
- Specified by:
getSerializer
in classAbstractType<java.util.UUID>
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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 classAbstractType<java.util.UUID>
- Parameters:
parsed
- the result of parsing a json string- Throws:
MarshalException
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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 classAbstractType<java.util.UUID>
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