com.liulishuo.filedownloader.stream

Class FileDownloadRandomAccessFile.Creator

java.lang.Object

com.liulishuo.filedownloader.stream.FileDownloadRandomAccessFile.Creator

All Implemented Interfaces:

FileDownloadHelper.OutputStreamCreator

Enclosing class:

FileDownloadRandomAccessFile

public static class FileDownloadRandomAccessFile.Creator
extends java.lang.Object
implements FileDownloadHelper.OutputStreamCreator

Constructor Summary

Constructors

Constructor and Description
Creator()

Method Summary

Modifier and Type	Method and Description
FileDownloadOutputStream	create(java.io.File file) The output stream creator is used for creating FileDownloadOutputStream which is used to write the input stream to the file for downloading.
boolean	supportSeek()

Methods inherited from class java.lang.Object

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

Constructor Detail

Creator

public Creator()

Method Detail

create

public FileDownloadOutputStream create(java.io.File file)
                                throws java.io.IOException

Description copied from interface: FileDownloadHelper.OutputStreamCreator

The output stream creator is used for creating FileDownloadOutputStream which is used to write the input stream to the file for downloading.

Note: please create a output stream which append the content to the exist file, which means that bytes would be written to the end of the file rather than the beginning.

Specified by:

create in interface FileDownloadHelper.OutputStreamCreator

Parameters:

file - the file will used for storing the downloading content.

Returns:

The output stream used to write downloading byte array to the file.

Throws:

java.io.FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

java.io.IOException

See Also:

FileDownloadRandomAccessFile.Creator

supportSeek

public boolean supportSeek()

Specified by:

supportSeek in interface FileDownloadHelper.OutputStreamCreator

Returns:

true if the FileDownloadOutputStream is created through FileDownloadHelper.OutputStreamCreator.create(File) support FileDownloadOutputStream.seek(long) function. If the FileDownloadOutputStream is created through FileDownloadHelper.OutputStreamCreator.create(File) doesn't support FileDownloadOutputStream.seek(long), please return false, in order to let the internal mechanism can predict this situation, and handle it smoothly.