com.alipay.sofa.ark.loader.data

Interface RandomAccessData

All Known Implementing Classes:

RandomAccessDataFile

public interface RandomAccessData

Interface that provides read-only random access to some underlying data. Implementations must allow concurrent reads in a thread-safe manner.

Author:

Phillip Webb

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	RandomAccessData.ResourceAccess Lock modes for accessing the underlying resource.

Method Summary

Modifier and Type	Method and Description
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.

Method Detail

getInputStream

InputStream getInputStream(RandomAccessData.ResourceAccess access)
                    throws IOException

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

Parameters:

access - hint indicating how the underlying data should be accessed

Returns:

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

Throws:

IOException - if the stream cannot be opened

getSubsection

RandomAccessData getSubsection(long offset,
                               long length)

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

Parameters:

offset - the offset of the subsection

length - the length of the subsection

Returns:

the subsection data

getSize

long getSize()

Returns the size of the data.

Returns:

the size