Package org.apache.wicket.markup.html.form.upload

Class FileUpload

java.lang.Object

org.apache.wicket.markup.html.form.upload.FileUpload

public class FileUpload
extends Object

Model for file uploads. Objects of this class should not be kept between requests, and should therefore be marked as transient if they become a property of an IModel.

Author:

Jonathan Locke

Constructor Summary

Constructors

Constructor	Description
FileUpload(org.apache.commons.fileupload.FileItem item)	Constructor

Method Summary

Modifier and Type	Method	Description
void	closeStreams()	Close the streams which has been opened when getting the InputStream using getInputStream().
void	delete()	Deletes temp file from disk
byte[]	getBytes()
String	getClientFileName()
String	getContentType()
byte[]	getDigest(String algorithm)	Get the MD5 checksum.
InputStream	getInputStream()	Get an input stream for the file uploaded.
byte[]	getMD5()	Get the MD5 checksum.
long	getSize()
void	writeTo(File file)	Saves this file upload to a given file on the server side.
File	writeToTempFile()	Convenience method that copies the input stream returned by getInputStream() into a temporary file.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileUpload

public FileUpload(org.apache.commons.fileupload.FileItem item)

Constructor

Parameters:

item - The uploaded file item

Method Detail

closeStreams

public final void closeStreams()

Close the streams which has been opened when getting the InputStream using getInputStream(). All the input streams are closed at the end of the request. This is done when the FileUploadField, which is associated with this FileUpload is detached.

If an exception is thrown when closing the input streams, we ignore it, because the stream might have been closed already.

delete

public void delete()

Deletes temp file from disk

getBytes

public byte[] getBytes()

Returns:

Uploaded file as an array of bytes

getDigest

public byte[] getDigest(String algorithm)

Get the MD5 checksum.

Parameters:

algorithm - the digest algorithm, e.g. MD5, SHA-1, SHA-256, SHA-512

Returns:

The cryptographic digest of the file

getMD5

public byte[] getMD5()

Get the MD5 checksum.

Returns:

The MD5 checksum of the file

getClientFileName

public String getClientFileName()

Returns:

name of uploaded client side file

Since:

1.2

getContentType

public String getContentType()

Returns:

Content type for upload

getInputStream

public InputStream getInputStream()
                           throws IOException

Get an input stream for the file uploaded. Use this input stream if you can't use writeTo(File) for persisting the uploaded file. This can be if you need to react upon the content of the file or need to persist it elsewhere, i.e. a database or external filesystem.

PLEASE NOTE!
The InputStream return will be closed be Wicket at the end of the request. If you need it across a request you need to hold on to this FileUpload instead.

Returns:

Input stream with file contents.

Throws:

IOException

getSize

public long getSize()

Returns:

The upload's size

writeTo

public void writeTo(File file)
             throws Exception

Saves this file upload to a given file on the server side.

Parameters:

file - The file

Throws:

Exception

writeToTempFile

public final File writeToTempFile()
                           throws Exception

Convenience method that copies the input stream returned by getInputStream() into a temporary file.

Only use this if you actually need a File to work with, in all other cases use getInputStream() or getBytes()

Returns:

temporary file containing the contents of the uploaded file

Throws:

Exception

Since:

1.2