org.apache.flink.connector.file.table

Class DeserializationSchemaAdapter

java.lang.Object

org.apache.flink.connector.file.table.DeserializationSchemaAdapter

All Implemented Interfaces:

Serializable, org.apache.flink.api.java.typeutils.ResultTypeQueryable<org.apache.flink.table.data.RowData>, BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>

@Internal
public class DeserializationSchemaAdapter
extends Object
implements BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>

Adapter to turn a DeserializationSchema into a BulkFormat.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.connector.file.src.reader.BulkFormat

BulkFormat.RecordIterator<T>

Constructor Summary

Constructors

Constructor and Description
DeserializationSchemaAdapter(org.apache.flink.api.common.serialization.DeserializationSchema<org.apache.flink.table.data.RowData> deserializationSchema)

Method Summary

Modifier and Type	Method and Description
org.apache.flink.connector.file.table.DeserializationSchemaAdapter.Reader	createReader(org.apache.flink.configuration.Configuration config, FileSourceSplit split) Creates a new reader that reads from the split's path starting at the split's offset and reads length bytes after the offset.
org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.table.data.RowData>	getProducedType() Gets the type produced by this format.
boolean	isSplittable() Checks whether this format is splittable.
org.apache.flink.connector.file.table.DeserializationSchemaAdapter.Reader	restoreReader(org.apache.flink.configuration.Configuration config, FileSourceSplit split) Creates a new reader that reads from split.path() starting at offset and reads until length bytes after the offset.

Methods inherited from class java.lang.Object

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

Constructor Detail

DeserializationSchemaAdapter

public DeserializationSchemaAdapter(org.apache.flink.api.common.serialization.DeserializationSchema<org.apache.flink.table.data.RowData> deserializationSchema)

Method Detail

createReader

public org.apache.flink.connector.file.table.DeserializationSchemaAdapter.Reader createReader(org.apache.flink.configuration.Configuration config,
                                                                                              FileSourceSplit split)
                                                                                       throws IOException

Description copied from interface: BulkFormat

Creates a new reader that reads from the split's path starting at the split's offset and reads length bytes after the offset.

Specified by:

createReader in interface BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>

Throws:

IOException

restoreReader

public org.apache.flink.connector.file.table.DeserializationSchemaAdapter.Reader restoreReader(org.apache.flink.configuration.Configuration config,
                                                                                               FileSourceSplit split)
                                                                                        throws IOException

Description copied from interface: BulkFormat

Creates a new reader that reads from split.path() starting at offset and reads until length bytes after the offset. A number of recordsToSkip records should be read and discarded after the offset. This is typically part of restoring a reader to a checkpointed position.

Specified by:

restoreReader in interface BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>

Throws:

IOException

isSplittable

public boolean isSplittable()

Description copied from interface: BulkFormat

Checks whether this format is splittable. Splittable formats allow Flink to create multiple splits per file, so that Flink can read multiple regions of the file concurrently.

See top-level JavaDocs (section "Splitting") for details.

Specified by:

isSplittable in interface BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>

getProducedType

public org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.table.data.RowData> getProducedType()

Description copied from interface: BulkFormat

Gets the type produced by this format. This type will be the type produced by the file source as a whole.

Specified by:

getProducedType in interface org.apache.flink.api.java.typeutils.ResultTypeQueryable<org.apache.flink.table.data.RowData>

Specified by:

getProducedType in interface BulkFormat<org.apache.flink.table.data.RowData,FileSourceSplit>