Package org.apache.cassandra.db.marshal

Class MapType<K,V>

java.lang.Object

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

org.apache.cassandra.db.marshal.CollectionType<Map<K,V>>

org.apache.cassandra.db.marshal.MapType<K,V>

All Implemented Interfaces:

Comparator<ByteBuffer>, AssignmentTestable

public class MapType<K,V>
extends CollectionType<Map<K,V>>

Nested Class Summary

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

CollectionType.Kind

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

AbstractType.ComparisonType, AbstractType.DefaultArgumentDeserializer

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

AssignmentTestable.TestResult

Field Summary

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

cellPathSerializer, kind

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

comparatorSet, comparisonType, isByteOrderComparable, reverseComparator

Method Summary

Modifier and Type	Method	Description
<T> ByteSource	asComparableBytes(ValueAccessor<T> accessor, T data, ByteComparable.Version version)	Produce a byte-comparable representation of the given value, i.e.
protected int	collectionSize(List<ByteBuffer> values)
<RL, TR> int	compareCustom(RL left, ValueAccessor<RL> accessorL, TR right, ValueAccessor<TR> 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
static <TL, TR> int	compareMaps(AbstractType<?> keysComparator, AbstractType<?> valuesComparator, TL left, ValueAccessor<TL> accessorL, TR right, ValueAccessor<TR> accessorR)
AbstractType<?>	expandUserTypes()	Replace any instances of UserType with equivalent TupleType-s.
void	forEach(ByteBuffer input, Consumer<ByteBuffer> action)
AbstractType<?>	freeze()
AbstractType<?>	freezeNestedMulticellTypes()	Returns an AbstractType instance that is equivalent to this one, but with all nested UDTs and collections explicitly frozen.
<T> T	fromComparableBytes(ValueAccessor<T> accessor, ByteSource.Peekable comparableBytes, ByteComparable.Version version)	Translates the given byte-ordered representation to the common, non-byte-ordered binary representation of a payload for this abstract type (the latter, common binary representation is what we mostly work with in the storage engine internals).
Term	fromJSONObject(Object parsed)	Given a parsed JSON string, return a byte representation of the object.
static <K, V> MapType<K,V>	getInstance(AbstractType<K> keys, AbstractType<V> values, boolean isMultiCell)
static MapType<?,?>	getInstance(TypeParser parser)
AbstractType<K>	getKeysType()
ByteBuffer	getMaskedValue()
MapSerializer<K,V>	getSerializer()
AbstractType<V>	getValuesType()
boolean	isCompatibleWithFrozen(CollectionType<?> previous)	A version of isCompatibleWith() to deal with non-multicell (frozen) collections
boolean	isMultiCell()
boolean	isValueCompatibleWithFrozen(CollectionType<?> previous)	A version of isValueCompatibleWith() to deal with non-multicell (frozen) collections
AbstractType<K>	nameComparator()
boolean	referencesDuration()
<T> boolean	referencesUserType(T name, ValueAccessor<T> accessor)
List<ByteBuffer>	serializedValues(Iterator<Cell<?>> cells)
List<AbstractType<?>>	subTypes()
String	toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion)	Converts the specified value into its JSON representation.
String	toString(boolean ignoreFreezing)
AbstractType<?>	unfreeze()
AbstractType<V>	valueComparator()
MapType<?,?>	withUpdatedUserType(UserType udt)	Returns an instance of this type with all references to the provided user type recursively replaced with its new definition.

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

asCQL3Type, equals, fromString, getString, hashCode, isCollection, isCompatibleWith, isFreezable, isMap, isSerializationCompatibleWith, isValueCompatibleWithInternal, makeCollectionReceiver, serializeForNativeProtocol, setOrListToJsonString, size, toString, validate, validateCellValue

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

allowsEmpty, asComparableBytes, asCQLTypeStringList, checkComparable, compare, compare, compareCollectionMembers, compareForCQL, compose, compose, decompose, decomposeUntyped, fromComparableBytes, getArgumentDeserializer, getCompatibleTypeIfKnown, getComponents, getString, getString, isCounter, isEmptyValueMeaningless, isFrozenCollection, isNull, isNull, isReversed, isTuple, isUDT, isValueCompatibleWith, isValueLengthFixed, isVector, parseDefaultParameters, read, readArray, readBuffer, readBuffer, referencesUserType, skipValue, testAssignment, testAssignment, toCQLString, toJSONString, udfType, unwrap, validate, validateCollectionMember, valueLengthIfFixed, writeValue, writeValue, writtenLength, writtenLength

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

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

Method Details

getInstance

public static MapType<?,?> getInstance(TypeParser parser)
                                throws ConfigurationException,
SyntaxException

Throws:

ConfigurationException

SyntaxException

getInstance

public static <K,
V> MapType<K,V> getInstance(AbstractType<K> keys,
 AbstractType<V> values,
 boolean isMultiCell)

referencesUserType

public <T> boolean referencesUserType(T name,
 ValueAccessor<T> accessor)

Overrides:

referencesUserType in class AbstractType<Map<K,V>>

withUpdatedUserType

public MapType<?,?> withUpdatedUserType(UserType udt)

Description copied from class: AbstractType

Returns an instance of this type with all references to the provided user type recursively replaced with its new definition.

Overrides:

withUpdatedUserType in class AbstractType<Map<K,V>>

expandUserTypes

public AbstractType<?> expandUserTypes()

Description copied from class: AbstractType

Replace any instances of UserType with equivalent TupleType-s. We need it for dropped_columns, to allow safely dropping unused user types later without retaining any references to them in system_schema.dropped_columns.

Overrides:

expandUserTypes in class AbstractType<Map<K,V>>

referencesDuration

public boolean referencesDuration()

Overrides:

referencesDuration in class AbstractType<Map<K,V>>

getKeysType

public AbstractType<K> getKeysType()

getValuesType

public AbstractType<V> getValuesType()

nameComparator

public AbstractType<K> nameComparator()

Specified by:

nameComparator in class CollectionType<Map<K,V>>

valueComparator

public AbstractType<V> valueComparator()

Specified by:

valueComparator in class CollectionType<Map<K,V>>

isMultiCell

public boolean isMultiCell()

Overrides:

isMultiCell in class AbstractType<Map<K,V>>

subTypes

public List<AbstractType<?>> subTypes()

Overrides:

subTypes in class AbstractType<Map<K,V>>

freeze

public AbstractType<?> freeze()

Overrides:

freeze in class AbstractType<Map<K,V>>

unfreeze

public AbstractType<?> unfreeze()

Overrides:

unfreeze in class AbstractType<Map<K,V>>

freezeNestedMulticellTypes

public AbstractType<?> freezeNestedMulticellTypes()

Description copied from class: AbstractType

Returns an AbstractType instance that is equivalent to this one, but with all nested UDTs and collections explicitly frozen. This is only necessary for 2.x -> 3.x schema migrations, and can be removed in Cassandra 4.0. See CASSANDRA-11609 and CASSANDRA-11613.

Overrides:

freezeNestedMulticellTypes in class AbstractType<Map<K,V>>

isCompatibleWithFrozen

public boolean isCompatibleWithFrozen(CollectionType<?> previous)

Description copied from class: CollectionType

A version of isCompatibleWith() to deal with non-multicell (frozen) collections

Specified by:

isCompatibleWithFrozen in class CollectionType<Map<K,V>>

isValueCompatibleWithFrozen

public boolean isValueCompatibleWithFrozen(CollectionType<?> previous)

Description copied from class: CollectionType

A version of isValueCompatibleWith() to deal with non-multicell (frozen) collections

Specified by:

isValueCompatibleWithFrozen in class CollectionType<Map<K,V>>

compareCustom

public <RL,
TR> int compareCustom(RL left,
 ValueAccessor<RL> accessorL,
 TR right,
 ValueAccessor<TR> 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<Map<K,V>>

compareMaps

public static <TL,
TR> int compareMaps(AbstractType<?> keysComparator,
 AbstractType<?> valuesComparator,
 TL left,
 ValueAccessor<TL> accessorL,
 TR right,
 ValueAccessor<TR> accessorR)

asComparableBytes

public <T> ByteSource asComparableBytes(ValueAccessor<T> accessor,
 T data,
 ByteComparable.Version version)

Description copied from class: AbstractType

Produce a byte-comparable representation of the given value, i.e. a sequence of bytes that compares the same way using lexicographical unsigned byte comparison as the original value using the type's comparator. We use a slightly stronger requirement to be able to use the types in tuples. Precisely, for any pair x, y of non-equal valid values of this type and any bytes b1, b2 between 0x10 and 0xEF, (+ stands for concatenation) compare(x, y) == compareLexicographicallyUnsigned(asByteComparable(x)+b1, asByteComparable(y)+b2) (i.e. the values compare like the original type, and an added 0x10-0xEF byte at the end does not change that) and: asByteComparable(x)+b1 is not a prefix of asByteComparable(y) (weakly prefix free) (i.e. a valid representation of a value may be a prefix of another valid representation of a value only if the following byte in the latter is smaller than 0x10 or larger than 0xEF). These properties are trivially true if the encoding compares correctly and is prefix free, but also permits a little more freedom that enables somewhat more efficient encoding of arbitrary-length byte-comparable blobs. Depending on the type, this method can be called for null or empty input, in which case the output is allowed to be null (the clustering/tuple encoding will accept and handle it).

Overrides:

asComparableBytes in class AbstractType<Map<K,V>>

fromComparableBytes

public <T> T fromComparableBytes(ValueAccessor<T> accessor,
 ByteSource.Peekable comparableBytes,
 ByteComparable.Version version)

Description copied from class: AbstractType

Translates the given byte-ordered representation to the common, non-byte-ordered binary representation of a payload for this abstract type (the latter, common binary representation is what we mostly work with in the storage engine internals). If the given bytes don't correspond to the encoding of some payload value for this abstract type, an IllegalArgumentException may be thrown.

Overrides:

fromComparableBytes in class AbstractType<Map<K,V>>

Parameters:

accessor - value accessor used to construct the value.

comparableBytes - A byte-ordered representation (presumably of a payload for this abstract type).

version - The byte-comparable version used to construct the representation.

Returns:

A of a payload for this abstract type, corresponding to the given byte-ordered representation, constructed using the supplied value accessor.

See Also:

• AbstractType.asComparableBytes(org.apache.cassandra.db.marshal.ValueAccessor<V>, V, org.apache.cassandra.utils.bytecomparable.ByteComparable.Version)

getSerializer

public MapSerializer<K,V> getSerializer()

Specified by:

getSerializer in class CollectionType<Map<K,V>>

collectionSize

protected int collectionSize(List<ByteBuffer> values)

Overrides:

collectionSize in class CollectionType<Map<K,V>>

toString

public String toString(boolean ignoreFreezing)

Overrides:

toString in class AbstractType<Map<K,V>>

Parameters:

ignoreFreezing - if true, the type string will not be wrapped with FrozenType(...), even if this type is frozen.

serializedValues

public List<ByteBuffer> serializedValues(Iterator<Cell<?>> cells)

Specified by:

serializedValues in class CollectionType<Map<K,V>>

fromJSONObject

public Term fromJSONObject(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<Map<K,V>>

Parameters:

parsed - the result of parsing a json string

Throws:

MarshalException

toJSONString

public String toJSONString(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<Map<K,V>>

Parameters:

buffer - the value to convert

protocolVersion - the protocol version to use for the conversion

Returns:

a JSON string representing the specified value

forEach

public void forEach(ByteBuffer input,
 Consumer<ByteBuffer> action)

Specified by:

forEach in class CollectionType<Map<K,V>>

getMaskedValue

public ByteBuffer getMaskedValue()

Overrides:

getMaskedValue in class AbstractType<Map<K,V>>

Returns:

A fixed, serialized value to be used when the column is masked, to be returned instead of the real value.