org.apache.wicket.util.upload
Interface FileItemStream

All Superinterfaces:

FileItemHeadersSupport

public interface FileItemStream
extends FileItemHeadersSupport

This interface provides access to a file or form item that was received within a multipart/form-data POST request. The items contents are retrieved by calling openStream().

Instances of this class are created by accessing the iterator, returned by FileUploadBase.getItemIterator(RequestContext).

Note: There is an interaction between the iterator and its associated instances of FileItemStream: By invoking Iterator.hasNext() on the iterator, you discard all data, which hasn't been read so far from the previous data.

Nested Class Summary

static class

FileItemStream.ItemSkippedException This exception is thrown, if an attempt is made to read data from the InputStream, which has been returned by openStream(), after Iterator.hasNext() has been invoked on the iterator, which created the FileItemStream.

Method Summary

java.lang.String	getContentType() Returns the content type passed by the browser or null if not defined.
java.lang.String	getFieldName() Returns the name of the field in the multipart form corresponding to this file item.
java.lang.String	getName() Returns the original filename in the client's filesystem, as provided by the browser (or other client software).
boolean	isFormField() Determines whether or not a FileItem instance represents a simple form field.
java.io.InputStream	openStream() Creates an InputStream, which allows to read the items contents.

Methods inherited from interface org.apache.wicket.util.upload.FileItemHeadersSupport

getHeaders, setHeaders

Method Detail

openStream

java.io.InputStream openStream()
                               throws java.io.IOException

Creates an InputStream, which allows to read the items contents.

Returns:

The input stream, from which the items data may be read.

Throws:

java.lang.IllegalStateException - The method was already invoked on this item. It is not possible to recreate the data stream.

java.io.IOException - An I/O error occurred.

See Also:

FileItemStream.ItemSkippedException

getContentType

java.lang.String getContentType()

Returns the content type passed by the browser or null if not defined.

Returns:

The content type passed by the browser or null if not defined.

getName

java.lang.String getName()

Returns the original filename in the client's filesystem, as provided by the browser (or other client software). In most cases, this will be the base file name, without path information. However, some clients, such as the Opera browser, do include path information.

Returns:

The original filename in the client's filesystem.

getFieldName

java.lang.String getFieldName()

Returns the name of the field in the multipart form corresponding to this file item.

Returns:

The name of the form field.

isFormField

boolean isFormField()

Determines whether or not a FileItem instance represents a simple form field.

Returns:

true if the instance represents a simple form field; false if it represents an uploaded file.