org.apache.arrow.vector.file

Class ArrowFileReader

java.lang.Object

org.apache.arrow.vector.file.ArrowReader<SeekableReadChannel>

org.apache.arrow.vector.file.ArrowFileReader

All Implemented Interfaces:

AutoCloseable, DictionaryProvider

public class ArrowFileReader
extends ArrowReader<SeekableReadChannel>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.arrow.vector.dictionary.DictionaryProvider

DictionaryProvider.MapDictionaryProvider

Constructor Summary

Constructors

Constructor and Description
ArrowFileReader(SeekableByteChannel in, BufferAllocator allocator)
ArrowFileReader(SeekableReadChannel in, BufferAllocator allocator)

Method Summary

Modifier and Type	Method and Description
List<ArrowBlock>	getDictionaryBlocks()
List<ArrowBlock>	getRecordBlocks()
boolean	loadRecordBatch(ArrowBlock block)
protected ArrowMessage	readMessage(SeekableReadChannel in, BufferAllocator allocator)
protected Schema	readSchema(SeekableReadChannel in)

Methods inherited from class org.apache.arrow.vector.file.ArrowReader

bytesRead, close, ensureInitialized, getDictionaryVectors, getVectorSchemaRoot, loadNextBatch, lookup

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrowFileReader

public ArrowFileReader(SeekableByteChannel in,
                       BufferAllocator allocator)

ArrowFileReader

public ArrowFileReader(SeekableReadChannel in,
                       BufferAllocator allocator)

Method Detail

readSchema

protected Schema readSchema(SeekableReadChannel in)
                     throws IOException

Specified by:

readSchema in class ArrowReader<SeekableReadChannel>

Throws:

IOException

readMessage

protected ArrowMessage readMessage(SeekableReadChannel in,
                                   BufferAllocator allocator)
                            throws IOException

Specified by:

readMessage in class ArrowReader<SeekableReadChannel>

Throws:

IOException

getDictionaryBlocks

public List<ArrowBlock> getDictionaryBlocks()
                                     throws IOException

Throws:

IOException

getRecordBlocks

public List<ArrowBlock> getRecordBlocks()
                                 throws IOException

Throws:

IOException

loadRecordBatch

public boolean loadRecordBatch(ArrowBlock block)
                        throws IOException

Throws:

IOException