org.bytedeco.arrow

Class RandomAccessFile

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow.FileInterface

org.bytedeco.arrow.InputStream

org.bytedeco.arrow.RandomAccessFile

All Implemented Interfaces:

AutoCloseable

Direct Known Subclasses:

BufferReaderRandomAccessFileConcurrencyWrapper, HdfsReadableFile, ParquetInputWrapper, RandomAccessFileSlowInputStreamBase, ReadableFileRandomAccessFileConcurrencyWrapper, ReadWriteFileInterface

@Namespace(value="arrow::io")
 @NoOffset
 @Properties(inherit=arrow.class)
public class RandomAccessFile
extends InputStream

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator, Pointer.ReferenceCounter

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
RandomAccessFile(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
Seekable	asSeekable()
static Seekable	asSeekable(RandomAccessFile pointer)
LongResult	GetSize() Return the total file size in bytes.
Status	GetSize(long[] size) Deprecated.
Status	GetSize(LongBuffer size) Deprecated.
Status	GetSize(LongPointer size) Deprecated.
static InputStream	GetStream(RandomAccessFile file, long file_offset, long nbytes) \brief Create an isolated InputStream that reads a segment of a RandomAccessFile.
BufferResult	ReadAt(long _position, long nbytes) \brief Read data from given file position.
Status	ReadAt(long _position, long nbytes, ArrowBuffer out) Deprecated.
Status	ReadAt(long _position, long nbytes, long[] bytes_read, Pointer out) Deprecated.
Status	ReadAt(long _position, long nbytes, LongBuffer bytes_read, Pointer out) Deprecated.
Status	ReadAt(long _position, long nbytes, LongPointer bytes_read, Pointer out) Deprecated.
LongResult	ReadAt(long _position, long nbytes, Pointer out) \brief Read data from given file position.

Methods inherited from class org.bytedeco.arrow.InputStream

Advance, asReadable, asReadable, Peek, supports_zero_copy

Methods inherited from class org.bytedeco.arrow.FileInterface

Abort, Close, closed, mode, Tell, Tell, Tell, Tell

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, parseBytes, physicalBytes, position, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, toString, totalBytes, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomAccessFile

public RandomAccessFile(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

Method Detail

asSeekable

public Seekable asSeekable()

asSeekable

@Namespace
 @Name(value="static_cast<arrow::io::Seekable*>")
public static Seekable asSeekable(RandomAccessFile pointer)

GetStream

@SharedPtr
public static InputStream GetStream(@SharedPtr
                                               RandomAccessFile file,
                                               @Cast(value="int64_t")
                                               long file_offset,
                                               @Cast(value="int64_t")
                                               long nbytes)

\brief Create an isolated InputStream that reads a segment of a RandomAccessFile. Multiple such stream can be created and used independently without interference

Parameters:

file - [in] a file instance

file_offset - [in] the starting position in the file

nbytes - [in] the extent of bytes to read. The file should have sufficient bytes available

GetSize

@ByVal
public LongResult GetSize()

Return the total file size in bytes.

ReadAt

@ByVal
public LongResult ReadAt(@Cast(value="int64_t")
                                long _position,
                                @Cast(value="int64_t")
                                long nbytes,
                                Pointer out)

\brief Read data from given file position. At most nbytes bytes are read. The number of bytes read is returned (it can be less than nbytes if EOF is reached). This method can be safely called from multiple threads concurrently. It is unspecified whether this method updates the file position or not. The default RandomAccessFile-provided implementation uses Seek() and Read(), but subclasses may override it with a more efficient implementation that doesn't depend on implicit file positioning.

Parameters:

position - [in] Where to read bytes from

nbytes - [in] The number of bytes to read

out - [out] The buffer to read bytes into

Returns:

The number of bytes read, or an error

ReadAt

@ByVal
public BufferResult ReadAt(@Cast(value="int64_t")
                                  long _position,
                                  @Cast(value="int64_t")
                                  long nbytes)

\brief Read data from given file position. At most nbytes bytes are read, but it can be less if EOF is reached.

Parameters:

position - [in] Where to read bytes from

nbytes - [in] The number of bytes to read

Returns:

A buffer containing the bytes read, or an error

ReadAt

@Deprecated
 @ByVal
public Status ReadAt(@Cast(value="int64_t")
                                         long _position,
                                         @Cast(value="int64_t")
                                         long nbytes,
                                         @Cast(value="int64_t*")
                                         LongPointer bytes_read,
                                         Pointer out)

Deprecated.

ReadAt

@Deprecated
 @ByVal
public Status ReadAt(@Cast(value="int64_t")
                                         long _position,
                                         @Cast(value="int64_t")
                                         long nbytes,
                                         @Cast(value="int64_t*")
                                         LongBuffer bytes_read,
                                         Pointer out)

Deprecated.

ReadAt

@Deprecated
 @ByVal
public Status ReadAt(@Cast(value="int64_t")
                                         long _position,
                                         @Cast(value="int64_t")
                                         long nbytes,
                                         @Cast(value="int64_t*")
                                         long[] bytes_read,
                                         Pointer out)

Deprecated.

ReadAt

@Deprecated
 @ByVal
public Status ReadAt(@Cast(value="int64_t")
                                         long _position,
                                         @Cast(value="int64_t")
                                         long nbytes,
                                         @SharedPtr @Cast(value={"","std::shared_ptr<arrow::Buffer>*"})
                                         ArrowBuffer out)

Deprecated.

GetSize

@Deprecated
 @ByVal
public Status GetSize(@Cast(value="int64_t*")
                                          LongPointer size)

Deprecated.

GetSize

@Deprecated
 @ByVal
public Status GetSize(@Cast(value="int64_t*")
                                          LongBuffer size)

Deprecated.

GetSize

@Deprecated
 @ByVal
public Status GetSize(@Cast(value="int64_t*")
                                          long[] size)

Deprecated.