org.apache.flink.table.runtime.typeutils

Class ExternalTypeInfo<T>

java.lang.Object

org.apache.flink.api.common.typeinfo.TypeInformation<T>

org.apache.flink.table.runtime.typeutils.ExternalTypeInfo<T>

Type Parameters:

T - external data structure

All Implemented Interfaces:

Serializable, org.apache.flink.table.types.DataTypeQueryable

@Internal
public final class ExternalTypeInfo<T>
extends org.apache.flink.api.common.typeinfo.TypeInformation<T>
implements org.apache.flink.table.types.DataTypeQueryable

Type information that wraps a serializer that originated from a DataType.

TypeInformation is a legacy class for the sole purpose of creating a TypeSerializer. This class acts as an adapter when entering or leaving the table ecosystem to other APIs where type information is required.

The original DataType is stored in every instance (for access during pre-flight phase and planning) but has no effect on equality because only serialization matters during runtime.

Note: This class is incomplete yet and only supports RAW types. But will be updated to support all kinds of data types in the future.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
boolean	canEqual(Object obj)
org.apache.flink.api.common.typeutils.TypeSerializer<T>	createSerializer(org.apache.flink.api.common.ExecutionConfig config)
org.apache.flink.api.common.typeutils.TypeSerializer<T>	createSerializer(org.apache.flink.api.common.serialization.SerializerConfig config)
boolean	equals(Object o)
int	getArity()
org.apache.flink.table.types.DataType	getDataType()
int	getTotalFields()
Class<T>	getTypeClass()
int	hashCode()
boolean	isBasicType()
boolean	isKeyType()
boolean	isTupleType()
static <T> ExternalTypeInfo<T>	of(org.apache.flink.table.types.DataType dataType) Creates type information for a DataType that is possibly represented by internal data structures but serialized and deserialized into external data structures.
static <T> ExternalTypeInfo<T>	of(org.apache.flink.table.types.DataType dataType, boolean isInternalInput) Creates type information for a DataType that is possibly represented by internal data structures but serialized and deserialized into external data structures.
String	toString()

Methods inherited from class org.apache.flink.api.common.typeinfo.TypeInformation

getGenericParameters, isSortKeyType, of, of

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <T> ExternalTypeInfo<T> of(org.apache.flink.table.types.DataType dataType)

Creates type information for a DataType that is possibly represented by internal data structures but serialized and deserialized into external data structures.

of

public static <T> ExternalTypeInfo<T> of(org.apache.flink.table.types.DataType dataType,
                                         boolean isInternalInput)

Creates type information for a DataType that is possibly represented by internal data structures but serialized and deserialized into external data structures.

Parameters:

isInternalInput - allows for a non-bidirectional serializer from internal to external

getDataType

public org.apache.flink.table.types.DataType getDataType()

Specified by:

getDataType in interface org.apache.flink.table.types.DataTypeQueryable

isBasicType

public boolean isBasicType()

Specified by:

isBasicType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

isTupleType

public boolean isTupleType()

Specified by:

isTupleType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getArity

public int getArity()

Specified by:

getArity in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTotalFields

public int getTotalFields()

Specified by:

getTotalFields in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTypeClass

public Class<T> getTypeClass()

Specified by:

getTypeClass in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

isKeyType

public boolean isKeyType()

Specified by:

isKeyType in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

createSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<T> createSerializer(org.apache.flink.api.common.serialization.SerializerConfig config)

Overrides:

createSerializer in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

createSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<T> createSerializer(org.apache.flink.api.common.ExecutionConfig config)

Specified by:

createSerializer in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

toString

public String toString()

Specified by:

toString in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

equals

public boolean equals(Object o)

Specified by:

equals in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

hashCode

public int hashCode()

Specified by:

hashCode in class org.apache.flink.api.common.typeinfo.TypeInformation<T>

canEqual

public boolean canEqual(Object obj)

Specified by:

canEqual in class org.apache.flink.api.common.typeinfo.TypeInformation<T>