org.apache.flink.formats.json

Class JsonRowDataDeserializationSchema

java.lang.Object

org.apache.flink.formats.json.JsonRowDataDeserializationSchema

All Implemented Interfaces:

Serializable, DeserializationSchema<RowData>, ResultTypeQueryable<RowData>

@Internal
public class JsonRowDataDeserializationSchema
extends Object
implements DeserializationSchema<RowData>

Deserialization schema from JSON to Flink Table/SQL internal data structure RowData.

Deserializes a byte[] message as a JSON object and reads the specified fields.

Failures during deserialization are forwarded as wrapped IOExceptions.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.api.common.serialization.DeserializationSchema

DeserializationSchema.InitializationContext

Constructor Summary

Constructors

Constructor and Description
JsonRowDataDeserializationSchema(RowType rowType, TypeInformation<RowData> resultTypeInfo, boolean failOnMissingField, boolean ignoreParseErrors, TimestampFormat timestampFormat)

Method Summary

Modifier and Type	Method and Description
RowData	deserialize(byte[] message) Deserializes the byte message.
boolean	equals(Object o)
TypeInformation<RowData>	getProducedType() Gets the data type (as a TypeInformation) produced by this function or input format.
int	hashCode()
boolean	isEndOfStream(RowData nextElement) Method to decide whether the element signals the end of the stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.api.common.serialization.DeserializationSchema

deserialize, open

Constructor Detail

JsonRowDataDeserializationSchema

public JsonRowDataDeserializationSchema(RowType rowType,
                                        TypeInformation<RowData> resultTypeInfo,
                                        boolean failOnMissingField,
                                        boolean ignoreParseErrors,
                                        TimestampFormat timestampFormat)

Method Detail

deserialize

public RowData deserialize(byte[] message)
                    throws IOException

Description copied from interface: DeserializationSchema

Deserializes the byte message.

Specified by:

deserialize in interface DeserializationSchema<RowData>

Parameters:

message - The message, as a byte array.

Returns:

The deserialized message as an object (null if the message cannot be deserialized).

Throws:

IOException

isEndOfStream

public boolean isEndOfStream(RowData nextElement)

Description copied from interface: DeserializationSchema

Method to decide whether the element signals the end of the stream. If true is returned the element won't be emitted.

Specified by:

isEndOfStream in interface DeserializationSchema<RowData>

Parameters:

nextElement - The element to test for the end-of-stream signal.

Returns:

True, if the element signals end of stream, false otherwise.

getProducedType

public TypeInformation<RowData> getProducedType()

Description copied from interface: ResultTypeQueryable

Gets the data type (as a TypeInformation) produced by this function or input format.

Specified by:

getProducedType in interface ResultTypeQueryable<RowData>

Returns:

The data type produced by this function or input format.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object