java.lang.Object
- org.apache.cassandra.db.marshal.AbstractType<T>
- - org.apache.cassandra.db.marshal.CollectionType<java.util.Map<K,V>>
  - - org.apache.cassandra.db.marshal.MapType<K,V>

All Implemented Interfaces:

java.util.Comparator<java.nio.ByteBuffer>, AssignmentTestable
```
public class MapType<K,V>
extends CollectionType<java.util.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
- 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

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected int`	`collectionSize(java.util.List<java.nio.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.
`AbstractType<?>`	`freeze()`
`AbstractType<?>`	`freezeNestedMulticellTypes()`	Returns an AbstractType instance that is equivalent to this one, but with all nested UDTs and collections explicitly frozen.
`Term`	`fromJSONObject(java.lang.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()`
`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)`
`java.util.List<java.nio.ByteBuffer>`	`serializedValues(java.util.Iterator<Cell<?>> cells)`
`java.util.List<AbstractType<?>>`	`subTypes()`
`java.lang.String`	`toJSONString(java.nio.ByteBuffer buffer, ProtocolVersion protocolVersion)`	Converts the specified value into its JSON representation.
`java.lang.String`	`toString(boolean ignoreFreezing)`
`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, isCollection, isCompatibleWith, isFreezable, isMap, isSerializationCompatibleWith, isValueCompatibleWithInternal, makeCollectionReceiver, serializeForNativeProtocol, toString, validateCellValue

Methods inherited from class org.apache.cassandra.db.marshal.AbstractType
asCQLTypeStringList, checkComparable, compare, compare, compareCollectionMembers, compareForCQL, compose, compose, decompose, decomposeUntyped, getComponents, getString, getString, isCounter, isEmptyValueMeaningless, isFrozenCollection, isReversed, isTuple, isUDT, isValueCompatibleWith, parseDefaultParameters, read, readArray, readBuffer, readBuffer, referencesUserType, skipValue, testAssignment, testAssignment, toCQLString, toJSONString, udfType, unwrap, validate, validate, validateCollectionMember, valueLengthIfFixed, writeValue, writeValue, writtenLength, writtenLength

Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator
reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Method Detail
  - 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<java.util.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<java.util.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<java.util.Map<K,V>>
  - referencesDuration
```
public boolean referencesDuration()
```
    Overrides:
    
    referencesDuration in class AbstractType<java.util.Map<K,V>>
  - getKeysType
```
public AbstractType<K> getKeysType()
```
  - getValuesType
```
public AbstractType<V> getValuesType()
```
  - nameComparator
```
public AbstractType<K> nameComparator()
```
    Specified by:
    
    nameComparator in class CollectionType<java.util.Map<K,V>>
  - valueComparator
```
public AbstractType<V> valueComparator()
```
    Specified by:
    
    valueComparator in class CollectionType<java.util.Map<K,V>>
  - isMultiCell
```
public boolean isMultiCell()
```
    Overrides:
    
    isMultiCell in class AbstractType<java.util.Map<K,V>>
  - subTypes
```
public java.util.List<AbstractType<?>> subTypes()
```
    Overrides:
    
    subTypes in class AbstractType<java.util.Map<K,V>>
  - freeze
```
public AbstractType<?> freeze()
```
    Overrides:
    
    freeze in class AbstractType<java.util.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<java.util.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<java.util.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<java.util.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<java.util.Map<K,V>>
  - compareMaps
```
public static <TL,TR> int compareMaps(AbstractType<?> keysComparator,
                                            AbstractType<?> valuesComparator,
                                            TL left,
                                            ValueAccessor<TL> accessorL,
                                            TR right,
                                            ValueAccessor<TR> accessorR)
```
  - getSerializer
```
public MapSerializer<K,V> getSerializer()
```
    Specified by:
    
    getSerializer in class CollectionType<java.util.Map<K,V>>
  - collectionSize
```
protected int collectionSize(java.util.List<java.nio.ByteBuffer> values)
```
    Overrides:
    
    collectionSize in class CollectionType<java.util.Map<K,V>>
  - toString
```
public java.lang.String toString(boolean ignoreFreezing)
```
    Overrides:
    
    toString in class AbstractType<java.util.Map<K,V>>
    
    Parameters:
    
    ignoreFreezing - if true, the type string will not be wrapped with FrozenType(...), even if this type is frozen.
  - serializedValues
```
public java.util.List<java.nio.ByteBuffer> serializedValues(java.util.Iterator<Cell<?>> cells)
```
    Specified by:
    
    serializedValues in class CollectionType<java.util.Map<K,V>>
  - 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.util.Map<K,V>>
    
    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.util.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

Class MapType<K,​V>

Nested Class Summary

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

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

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

Field Summary

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

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

Method Summary

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

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

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Comparator

Method Detail

getInstance

getInstance

referencesUserType

withUpdatedUserType

expandUserTypes

referencesDuration

getKeysType

getValuesType

nameComparator

valueComparator

isMultiCell

subTypes

freeze

freezeNestedMulticellTypes

isCompatibleWithFrozen

isValueCompatibleWithFrozen

compareCustom

compareMaps

getSerializer

collectionSize

toString

serializedValues

fromJSONObject

toJSONString

Class MapType<K,V>