org.bytedeco.arrow

Class SlowRandomAccessFile

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow.RandomAccessFile

org.bytedeco.arrow.RandomAccessFileSlowInputStreamBase

org.bytedeco.arrow.SlowRandomAccessFile

All Implemented Interfaces:

AutoCloseable

@Namespace(value="arrow::io")
 @Properties(inherit=arrow.class)
public class SlowRandomAccessFile
extends RandomAccessFileSlowInputStreamBase

\brief A RandomAccessFile wrapper that makes reads slower. Similar to SlowInputStream, but allows random access and seeking.

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
SlowRandomAccessFile(Pointer p) Pointer cast constructor.
SlowRandomAccessFile(RandomAccessFile stream, double average_latency)
SlowRandomAccessFile(RandomAccessFile stream, double average_latency, int seed)
SlowRandomAccessFile(RandomAccessFile stream, LatencyGenerator latencies)

Method Summary

Modifier and Type	Method and Description
Status	Abort()
Status	Close()
boolean	closed()
LongResult	GetSize() \brief Return the total file size in bytes.
StringViewResult	Peek(long nbytes)
BufferResult	Read(long nbytes)
LongResult	Read(long nbytes, Pointer out)
BufferResult	ReadAt(long _position, long nbytes) \brief Read data from given file position.
LongResult	ReadAt(long _position, long nbytes, Pointer out) \brief Read data from given file position.
Status	Seek(long _position)
LongResult	Tell()

Methods inherited from class org.bytedeco.arrow.RandomAccessFile

asInputStream, asInputStream, asSeekable, asSeekable, GetStream, WillNeed

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, getPointer, getPointer, getPointer, getPointer, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetAddress, offsetof, offsetof, parseBytes, physicalBytes, position, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, sizeof, toString, totalBytes, totalCount, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

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

Constructor Detail

SlowRandomAccessFile

public SlowRandomAccessFile(@SharedPtr @Cast(value={"","std::shared_ptr<arrow::io::RandomAccessFile>"})
                            RandomAccessFile stream,
                            @SharedPtr
                            LatencyGenerator latencies)

SlowRandomAccessFile

public SlowRandomAccessFile(@SharedPtr @Cast(value={"","std::shared_ptr<arrow::io::RandomAccessFile>"})
                            RandomAccessFile stream,
                            double average_latency)

SlowRandomAccessFile

public SlowRandomAccessFile(@SharedPtr @Cast(value={"","std::shared_ptr<arrow::io::RandomAccessFile>"})
                            RandomAccessFile stream,
                            double average_latency,
                            int seed)

SlowRandomAccessFile

public SlowRandomAccessFile(Pointer p)

Pointer cast constructor. Invokes Pointer(Pointer).

Method Detail

Close

@ByVal
public Status Close()

Abort

@ByVal
public Status Abort()

closed

@Cast(value="bool")
public boolean closed()

Read

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

Read

@ByVal
public BufferResult Read(@Cast(value="int64_t")
                                long nbytes)

ReadAt

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

Description copied from class: RandomAccessFile

\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.

Overrides:

ReadAt in class RandomAccessFile

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)

Description copied from class: RandomAccessFile

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

Overrides:

ReadAt in class RandomAccessFile

nbytes - [in] The number of bytes to read

Returns:

A buffer containing the bytes read, or an error

Peek

@ByVal
public StringViewResult Peek(@Cast(value="int64_t")
                                    long nbytes)

GetSize

@ByVal
public LongResult GetSize()

Description copied from class: RandomAccessFile

\brief Return the total file size in bytes. This method does not read or move the current file position, so is safe to call concurrently with e.g. ReadAt().

Overrides:

GetSize in class RandomAccessFile

Seek

@ByVal
public Status Seek(@Cast(value="int64_t")
                          long _position)

Tell

@ByVal
public LongResult Tell()