com.vaadin.flow.component.upload.receivers

Class FileBuffer

java.lang.Object

com.vaadin.flow.component.upload.receivers.AbstractFileBuffer

com.vaadin.flow.component.upload.receivers.FileBuffer

All Implemented Interfaces:

Receiver, Serializable

public class FileBuffer
extends AbstractFileBuffer
implements Receiver

Basic in file receiver implementation. File is stored by default to File created using File.createTempFile(String, String) with a null suffix.

For a custom file the constructor AbstractFileBuffer(FileFactory) should be used.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FileBuffer() Creates a file buffer with a default file factory.
FileBuffer(FileFactory factory) Creates a file buffer that uses a file factory to create a custom upload File.

Method Summary

Modifier and Type	Method and Description
FileData	getFileData() Get the file data object.
FileDescriptor	getFileDescriptor() Get the output stream for file.
String	getFileName() Get the file name for this buffer.
InputStream	getInputStream() Get the input stream for file.
OutputStream	receiveUpload(String fileName, String mimeType) Invoked when a new upload arrives.

Methods inherited from class com.vaadin.flow.component.upload.receivers.AbstractFileBuffer

createFileOutputStream, getLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

FileBuffer

public FileBuffer()

Creates a file buffer with a default file factory.

Files will be created using File.createTempFile(String, String) and have that build 'upload_tmpfile_{FILENAME}_{currentTimeMillis}'

FileBuffer

public FileBuffer(FileFactory factory)

Creates a file buffer that uses a file factory to create a custom upload File.

Parameters:

factory - file factory for file buffer

Method Detail

receiveUpload

public OutputStream receiveUpload(String fileName,
                                  String mimeType)

Description copied from interface: Receiver

Invoked when a new upload arrives.

Specified by:

receiveUpload in interface Receiver

Parameters:

fileName - the desired filename of the upload, usually as specified by the client

mimeType - the MIME type of the uploaded file

Returns:

stream to which the uploaded file should be written

getFileData

public FileData getFileData()

Get the file data object.

Returns:

file data for the latest upload or null

getFileName

public String getFileName()

Get the file name for this buffer.

Returns:

file name or empty if no file

getFileDescriptor

public FileDescriptor getFileDescriptor()

Get the output stream for file.

Returns:

file output stream or null if not available

getInputStream

public InputStream getInputStream()

Get the input stream for file.

Returns:

input stream for file or empty stream if file not found