Package org.apache.cassandra.cql3.functions.types

Class DataType.CollectionType

java.lang.Object

org.apache.cassandra.cql3.functions.types.DataType

org.apache.cassandra.cql3.functions.types.DataType.CollectionType

Enclosing class:

DataType

public static class DataType.CollectionType
extends DataType

Instances of this class represent collection types, that is, lists, sets or maps.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.cql3.functions.types.DataType

DataType.CollectionType, DataType.CustomType, DataType.Name, DataType.NativeType

Field Summary

Fields inherited from class org.apache.cassandra.cql3.functions.types.DataType

name

Method Summary

Modifier and Type	Method	Description
String	asFunctionParameterString()	Returns a String representation of this data type suitable for inclusion as a parameter type in a function or aggregate signature.
final boolean	equals(Object o)
List<DataType>	getTypeArguments()	Returns the type arguments of this type.
final int	hashCode()
boolean	isFrozen()	Returns whether this data type is frozen.
String	toString()

Methods inherited from class org.apache.cassandra.cql3.functions.types.DataType

ascii, bigint, blob, cboolean, cdouble, cfloat, cint, counter, custom, date, decimal, duration, getName, inet, isCollection, list, list, map, map, set, set, smallint, text, time, timestamp, timeuuid, tinyint, uuid, varchar, varint, vector

Methods inherited from class java.lang.Object

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

Method Details

isFrozen

public boolean isFrozen()

Description copied from class: DataType

Returns whether this data type is frozen.

This applies to User Defined Types, tuples and nested collections. Frozen types are serialized as a single value in Cassandra's storage engine, whereas non-frozen types are stored in a form that allows updates to individual subfields.

Specified by:

isFrozen in class DataType

Returns:

whether this data type is frozen.

getTypeArguments

public List<DataType> getTypeArguments()

Description copied from class: DataType

Returns the type arguments of this type.

Note that only the collection types (LIST, MAP, SET) have type arguments. For the other types, this will return an empty list.

For the collection types:

• For lists and sets, this method returns one argument, the type of the elements.
• For maps, this method returns two arguments, the first one is the type of the map keys, the second one is the type of the map values.

Overrides:

getTypeArguments in class DataType

Returns:

an immutable list containing the type arguments of this type.

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

asFunctionParameterString

public String asFunctionParameterString()

Description copied from class: DataType

Returns a String representation of this data type suitable for inclusion as a parameter type in a function or aggregate signature.

In such places, the String representation might vary from the canonical one as returned by Object.toString(); e.g. the frozen keyword is not accepted.

Overrides:

asFunctionParameterString in class DataType

Returns:

a String representation of this data type suitable for inclusion as a parameter type in a function or aggregate signature.