com.alipay.sofa.ark.loader.data

类 RandomAccessDataFile

java.lang.Object

com.alipay.sofa.ark.loader.data.RandomAccessDataFile

所有已实现的接口:

RandomAccessData

public class RandomAccessDataFile
extends Object
implements RandomAccessData

RandomAccessData implementation backed by a RandomAccessFile.

作者:

Phillip Webb

嵌套类概要

从接口继承的嵌套类/接口 com.alipay.sofa.ark.loader.data.RandomAccessData

RandomAccessData.ResourceAccess

构造器概要

构造器

构造器和说明
RandomAccessDataFile(File file) Create a new RandomAccessDataFile backed by the specified file.
RandomAccessDataFile(File file, int concurrentReads) Create a new RandomAccessDataFile backed by the specified file.

方法概要

限定符和类型	方法和说明
void	close()
File	getFile() Returns the underlying File.
InputStream	getInputStream(RandomAccessData.ResourceAccess access) Returns an InputStream that can be used to read the underlying data.
long	getSize() Returns the size of the data.
RandomAccessData	getSubsection(long offset, long length) Returns a new RandomAccessData for a specific subsection of this data.

从类继承的方法 java.lang.Object

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

构造器详细资料

RandomAccessDataFile

public RandomAccessDataFile(File file)

Create a new RandomAccessDataFile backed by the specified file.

参数:

file - the underlying file

抛出:

IllegalArgumentException - if the file is null or does not exist

另请参阅:

RandomAccessDataFile(File, int)

RandomAccessDataFile

public RandomAccessDataFile(File file,
                            int concurrentReads)

Create a new RandomAccessDataFile backed by the specified file.

参数:

file - the underlying file

concurrentReads - the maximum number of concurrent reads allowed on the underlying file before blocking

抛出:

IllegalArgumentException - if the file is null or does not exist

另请参阅:

RandomAccessDataFile(File)

方法详细资料

getFile

public File getFile()

Returns the underlying File.

返回:

the underlying file

getInputStream

public InputStream getInputStream(RandomAccessData.ResourceAccess access)
                           throws IOException

从接口复制的说明: RandomAccessData

Returns an InputStream that can be used to read the underlying data. The caller is responsible close the underlying stream.

指定者:

getInputStream 在接口中 RandomAccessData

参数:

access - hint indicating how the underlying data should be accessed

返回:

a new input stream that can be used to read the underlying data.

抛出:

IOException - if the stream cannot be opened

getSubsection

public RandomAccessData getSubsection(long offset,
                                      long length)

从接口复制的说明: RandomAccessData

Returns a new RandomAccessData for a specific subsection of this data.

指定者:

getSubsection 在接口中 RandomAccessData

参数:

offset - the offset of the subsection

length - the length of the subsection

返回:

the subsection data

getSize

public long getSize()

从接口复制的说明: RandomAccessData

Returns the size of the data.

指定者:

getSize 在接口中 RandomAccessData

返回:

the size

close

public void close()
           throws IOException

抛出:

IOException