org.apache.paimon.io.cache

类 FileBasedRandomInputView

java.lang.Object

org.apache.paimon.data.AbstractPagedInputView

org.apache.paimon.io.cache.FileBasedRandomInputView

所有已实现的接口:

Closeable, DataInput, AutoCloseable, DataInputView, SeekableDataInputView

public class FileBasedRandomInputView
extends AbstractPagedInputView
implements SeekableDataInputView, Closeable

A SeekableDataInputView to read bytes from RandomAccessFile, the bytes can be cached to MemorySegments in CacheManager.

构造器概要

构造器

构造器和说明
FileBasedRandomInputView(File file, CacheManager cacheManager, int segmentSize)

方法概要

限定符和类型	方法和说明
void	close()
RandomAccessFile	file()
protected int	getLimitForSegment(MemorySegment segment) Gets the limit for reading bytes from the given memory segment.
protected MemorySegment	nextSegment(MemorySegment current) The method by which concrete subclasses realize page crossing.
void	setReadPosition(long position) Sets the read pointer to the given position.

从类继承的方法 org.apache.paimon.data.AbstractPagedInputView

advance, clear, doAdvance, getCurrentPositionInSegment, getCurrentSegment, getCurrentSegmentLimit, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seekInput, skipBytes, skipBytesToRead

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.paimon.io.DataInputView

read, read, skipBytesToRead

从接口继承的方法 java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

构造器详细资料

FileBasedRandomInputView

public FileBasedRandomInputView(File file,
                                CacheManager cacheManager,
                                int segmentSize)
                         throws FileNotFoundException

抛出:

FileNotFoundException

方法详细资料

setReadPosition

public void setReadPosition(long position)

从接口复制的说明: SeekableDataInputView

Sets the read pointer to the given position.

指定者:

setReadPosition 在接口中 SeekableDataInputView

参数:

position - The new read position.

nextSegment

protected MemorySegment nextSegment(MemorySegment current)
                             throws EOFException

从类复制的说明: AbstractPagedInputView

The method by which concrete subclasses realize page crossing. This method is invoked when the current page is exhausted and a new page is required to continue the reading. If no further page is available, this method must throw an EOFException.

指定者:

nextSegment 在类中 AbstractPagedInputView

参数:

current - The current page that was read to its limit. May be null, if this method is invoked for the first time.

返回:

The next page from which the reading should continue. May not be null. If the input is exhausted, an EOFException must be thrown instead.

抛出:

EOFException - Thrown, if no further segment is available.

getLimitForSegment

protected int getLimitForSegment(MemorySegment segment)

从类复制的说明: AbstractPagedInputView

Gets the limit for reading bytes from the given memory segment. This method must return the position of the byte after the last valid byte in the given memory segment. When the position returned by this method is reached, the view will attempt to switch to the next memory segment.

指定者:

getLimitForSegment 在类中 AbstractPagedInputView

参数:

segment - The segment to determine the limit for.

返回:

The limit for the given memory segment.

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

抛出:

IOException

file

public RandomAccessFile file()