org.apache.flink.table.runtime.typeutils

类 ExternalTypeInfo<T>

java.lang.Object

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

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

类型参数:

T - external data structure

所有已实现的接口:

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.

另请参阅:

序列化表格

方法概要

限定符和类型	方法和说明
boolean	canEqual(Object obj)
org.apache.flink.api.common.typeutils.TypeSerializer<T>	createSerializer(org.apache.flink.api.common.ExecutionConfig 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()

从类继承的方法 org.apache.flink.api.common.typeinfo.TypeInformation

getGenericParameters, isSortKeyType, of, of

从类继承的方法 java.lang.Object

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

方法详细资料

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.

参数:

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

getDataType

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

指定者:

getDataType 在接口中 org.apache.flink.table.types.DataTypeQueryable

isBasicType

public boolean isBasicType()

指定者:

isBasicType 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

isTupleType

public boolean isTupleType()

指定者:

isTupleType 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

getArity

public int getArity()

指定者:

getArity 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTotalFields

public int getTotalFields()

指定者:

getTotalFields 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

getTypeClass

public Class<T> getTypeClass()

指定者:

getTypeClass 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

isKeyType

public boolean isKeyType()

指定者:

isKeyType 在类中 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)

指定者:

createSerializer 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

toString

public String toString()

指定者:

toString 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

equals

public boolean equals(Object o)

指定者:

equals 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

hashCode

public int hashCode()

指定者:

hashCode 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>

canEqual

public boolean canEqual(Object obj)

指定者:

canEqual 在类中 org.apache.flink.api.common.typeinfo.TypeInformation<T>