Package org.apache.flink.table.types

Class CollectionDataType

java.lang.Object

org.apache.flink.table.types.DataType

org.apache.flink.table.types.CollectionDataType

All Implemented Interfaces:

Serializable, AbstractDataType<DataType>

@PublicEvolving
public final class CollectionDataType
extends DataType

A data type that contains an element type (e.g. ARRAY or MULTISET).

See Also:

• for a list of supported data types
• Serialized Form

Field Summary

Fields inherited from class org.apache.flink.table.types.DataType

conversionClass, logicalType

Constructor Summary

Constructors

Constructor	Description
CollectionDataType(LogicalType logicalType, Class<?> conversionClass, DataType elementDataType)
CollectionDataType(LogicalType logicalType, DataType elementDataType)

Method Summary

Modifier and Type	Method	Description
<R> R	accept(DataTypeVisitor<R> visitor)
DataType	bridgedTo(Class<?> newConversionClass)	Adds a hint that data should be represented using the given class when entering or leaving the table ecosystem.
boolean	equals(Object o)
List<DataType>	getChildren()	Returns the children of this data type, if any.
DataType	getElementDataType()
int	hashCode()
DataType	notNull()	Adds a hint that null values are not expected in the data for this type.
DataType	nullable()	Adds a hint that null values are expected in the data for this type (default behavior).

Methods inherited from class org.apache.flink.table.types.DataType

getConversionClass, getFieldCount, getFieldDataTypes, getFieldNames, getFields, getLogicalType, toInternal, toString

Methods inherited from class java.lang.Object

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

Constructor Details

CollectionDataType

public CollectionDataType(LogicalType logicalType,
 @Nullable
 Class<?> conversionClass,
 DataType elementDataType)

CollectionDataType

public CollectionDataType(LogicalType logicalType,
 DataType elementDataType)

Method Details

getElementDataType

public DataType getElementDataType()

notNull

public DataType notNull()

Description copied from interface: AbstractDataType

Adds a hint that null values are not expected in the data for this type.

Returns:

a new, reconfigured data type instance

nullable

public DataType nullable()

Description copied from interface: AbstractDataType

Adds a hint that null values are expected in the data for this type (default behavior).

This method exists for explicit declaration of the default behavior or for invalidation of a previous call to AbstractDataType.notNull().

Returns:

a new, reconfigured data type instance

bridgedTo

public DataType bridgedTo(Class<?> newConversionClass)

Description copied from interface: AbstractDataType

Adds a hint that data should be represented using the given class when entering or leaving the table ecosystem.

A supported conversion class depends on the logical type and its nullability property.

Please see the implementation of LogicalType.supportsInputConversion(Class), LogicalType.supportsOutputConversion(Class), or the documentation for more information about supported conversions.

Returns:

a new, reconfigured data type instance

getChildren

public List<DataType> getChildren()

Description copied from class: DataType

Returns the children of this data type, if any. Returns an empty list if this data type is atomic.

Specified by:

getChildren in class DataType

Returns:

the children data types

accept

public <R> R accept(DataTypeVisitor<R> visitor)

Specified by:

accept in class DataType

equals

public boolean equals(Object o)

Overrides:

equals in class DataType

hashCode

public int hashCode()

Overrides:

hashCode in class DataType