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

Class FileUploadField

java.lang.Object

org.apache.wicket.Component

org.apache.wicket.MarkupContainer

org.apache.wicket.markup.html.WebMarkupContainer

org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

org.apache.wicket.markup.html.form.FormComponent<List<FileUpload>>

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

All Implemented Interfaces:

Serializable, Iterable<Component>, IEventSink, IEventSource, IFeedbackContributor, IConverterLocator, IGenericComponent<List<FileUpload>,FormComponent<List<FileUpload>>>, IMetadataContext<Serializable,Component>, IFormModelUpdateListener, IFormVisitorParticipant, ILabelProvider<String>, IHeaderContributor, IRequestableComponent, IHierarchical<Component>, IClusterable

public class FileUploadField
extends FormComponent<List<FileUpload>>

Form component that corresponds to a <input type="file">. When a FileInput component is nested in a Form, that has multipart == true, its model is updated with the FileUpload for this component.

NOTEThe model of this component is reset with null at the end of the request because FileUpload instances do not survive across requests since the input streams they point to will be closed. Because of this, the FileUpload instance should be processed within the same request as the form containing it was submitted.

Author:

Eelco Hillenius

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.wicket.markup.html.form.FormComponent

FLAG_CONVERT_EMPTY_INPUT_STRING_TO_NULL, VALUE_SEPARATOR

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_INITIALIZED, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED8, PARENT_PATH, PATH_SEPARATOR, RENDER, RFLAG_CONTAINER_DEQUEING, RFLAG_CONTAINER_HAS_REMOVALS

Constructor Summary

Constructors

Constructor	Description
FileUploadField(String id)
FileUploadField(String id, IModel<? extends List<FileUpload>> model)

Method Summary

Modifier and Type	Method	Description
protected List<FileUpload>	convertValue(String[] value)	Subclasses should overwrite this if the conversion is not done through the type field and the IConverter.
protected boolean	forceCloseStreamsOnDetach()	The FileUploadField will close any input streams you have opened in its FileUpload by default.
FileUpload	getFileUpload()
List<FileUpload>	getFileUploads()
String[]	getInputAsArray()	Gets the request parameters for this component as strings.
boolean	isMultiPart()
protected void	onComponentTag(ComponentTag tag)	Processes the component tag.
protected void	onDetach()	Clean up at the end of the request.
void	updateModel()	Updates this components model from the request, it expects that the object is already converted through the convertInput() call that is called by the validate() method when a form is being processed.

Methods inherited from class org.apache.wicket.markup.html.form.FormComponent

add, add, checkRequired, clearInput, convertInput, error, getConvertedInput, getDefaultLabel, getDefaultLabel, getForm, getInput, getInputName, getModelValue, getParameterValues, getRawInput, getType, getValidatorKeyPrefix, getValidators, getValue, hasRawInput, inputAsInt, inputAsInt, inputAsIntArray, inputChanged, internalOnModelChanged, invalid, isInputNullable, isRequired, isValid, newValidatable, newValidationError, onDisabled, onInvalid, onValid, processChildren, processInput, remove, reportRequiredError, setConvertedInput, setLabel, setModelValue, setRequired, setType, shouldTrimInput, trim, updateAutoLabels, updateCollectionModel, valid, validate, validateRequired, validateValidators, visitComponentsPostOrder, visitFormComponentsPostOrder

Methods inherited from class org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

getLabel

Methods inherited from class org.apache.wicket.markup.html.WebMarkupContainer

getWebApplication, getWebPage, getWebRequest, getWebResponse, getWebSession

Methods inherited from class org.apache.wicket.MarkupContainer

add, addDequeuedComponent, addOrReplace, autoAdd, canDequeueTag, contains, dequeue, dequeue, dequeuePreamble, findChildComponent, findComponentToDequeue, get, getAssociatedMarkup, getAssociatedMarkupStream, getMarkup, getMarkupType, getRegionMarkup, internalAdd, internalInitialize, iterator, iterator, newDequeueContext, onComponentTagBody, onInitialize, onRender, queue, remove, remove, removeAll, renderAll, renderAssociatedMarkup, renderNext, replace, setDefaultModel, size, stream, streamChildren, toString, toString, visitChildren, visitChildren

Methods inherited from class org.apache.wicket.Component

add, addStateChange, beforeRender, canCallListener, canCallListenerAfterExpiry, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, clearOriginalDestination, configure, continueToOriginalDestination, createConverter, debug, detach, detachModel, detachModels, determineVisibility, error, exceptionMessage, fatal, findMarkupStream, findPage, findParent, findParentWithAssociatedMarkup, getAjaxRegionMarkupId, getApplication, getBehaviorById, getBehaviorId, getBehaviors, getBehaviors, getClassRelativePath, getConverter, getDefaultModel, getDefaultModelObject, getDefaultModelObjectAsString, getDefaultModelObjectAsString, getEscapeModelStrings, getFeedbackMessages, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkup, getMarkupAttributes, getMarkupId, getMarkupId, getMarkupIdFromMarkup, getMarkupIdImpl, getMarkupSourcingStrategy, getMarkupTag, getMetaData, getModelComparator, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getRequestFlag, getResponse, getSession, getSizeInBytes, getStatelessHint, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, initModel, internalRenderComponent, internalRenderHead, isActionAuthorized, isAuto, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isInitialized, isRenderAllowed, isRendering, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, markRendering, modelChanged, modelChanging, newMarkupSourcingStrategy, onAfterRender, onBeforeRender, onConfigure, onEvent, onModelChanged, onModelChanging, onReAdd, onRemove, redirectToInterceptPage, remove, remove, render, renderComponentTag, rendered, renderHead, renderPart, renderPlaceholderTag, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, send, setAuto, setDefaultModelObject, setEnabled, setEscapeModelStrings, setFlag, setIgnoreAttributeModifier, setMarkup, setMarkupId, setMarkupIdImpl, setMetaData, setOutputMarkupId, setOutputMarkupPlaceholderTag, setParent, setRenderBodyOnly, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, success, urlFor, urlFor, urlFor, urlForListener, urlForListener, visitParents, visitParents, warn, wrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wicket.IGenericComponent

getDefaultModel, getDefaultModelObject, getModel, getModelObject, setDefaultModel, setDefaultModelObject, setModel, setModelObject

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

FileUploadField

public FileUploadField(String id)

See Also:

• Component(String)

FileUploadField

public FileUploadField(String id,
 IModel<? extends List<FileUpload>> model)

Parameters:

id - See Component

model - the model holding the uploaded FileUploads

Method Details

getFileUpload

public FileUpload getFileUpload()

Returns:

the first uploaded file if HTML5 <input type="file" multiple /> is used and the browser supports multiple, otherwise returns the single uploaded file.

See Also:

• getFileUploads()

getFileUploads

public List<FileUpload> getFileUploads()

Returns:

a list of all uploaded files. The list is empty if no files were selected. It will return more than one files if:

• HTML5 <input type="file" multiple /> is used
• the browser supports multiple attribute
• the user has selected more than one files from the Select file dialog

updateModel

public void updateModel()

Description copied from class: FormComponent

Updates this components model from the request, it expects that the object is already converted through the convertInput() call that is called by the validate() method when a form is being processed. By default it just does this:

 setModelObject(getConvertedInput());
 

DO NOT CALL THIS METHOD DIRECTLY UNLESS YOU ARE SURE WHAT YOU ARE DOING. USUALLY UPDATING YOUR MODEL IS HANDLED BY THE FORM, NOT DIRECTLY BY YOU.

Specified by:

updateModel in interface IFormModelUpdateListener

Overrides:

updateModel in class FormComponent<List<FileUpload>>

getInputAsArray

public String[] getInputAsArray()

Description copied from class: FormComponent

Gets the request parameters for this component as strings.

Overrides:

getInputAsArray in class FormComponent<List<FileUpload>>

Returns:

The values in the request for this component

convertValue

protected List<FileUpload> convertValue(String[] value)
                                 throws ConversionException

Description copied from class: FormComponent

Subclasses should overwrite this if the conversion is not done through the type field and the IConverter. WARNING: this method may be removed in future versions. If conversion fails then a ConversionException should be thrown

Overrides:

convertValue in class FormComponent<List<FileUpload>>

Parameters:

value - The value can be the getInput() or through a cookie

Returns:

The converted value. default returns just the given value

Throws:

ConversionException - If input can't be converted

isMultiPart

public boolean isMultiPart()

Overrides:

isMultiPart in class FormComponent<List<FileUpload>>

Returns:

True if this component encodes data in a multipart form submit

onComponentTag

protected void onComponentTag(ComponentTag tag)

Description copied from class: FormComponent

Processes the component tag.

Overrides:

onComponentTag in class FormComponent<List<FileUpload>>

Parameters:

tag - Tag to modify

See Also:

• Component.onComponentTag(ComponentTag)

onDetach

protected void onDetach()

Clean up at the end of the request. This means closing all inputstreams which might have been opened from the fileUpload.

Overrides:

onDetach in class FormComponent<List<FileUpload>>

See Also:

• Component.onDetach()

forceCloseStreamsOnDetach

protected boolean forceCloseStreamsOnDetach()

The FileUploadField will close any input streams you have opened in its FileUpload by default. If you wish to manage the stream yourself (e.g. you want to use it in another thread) then you can override this method to prevent this behavior.

Returns:

true if stream should be closed at the end of request