Package org.apache.wicket.markup.html.list

Class Loop

java.lang.Object

org.apache.wicket.Component

org.apache.wicket.MarkupContainer

org.apache.wicket.markup.html.WebMarkupContainer

org.apache.wicket.markup.repeater.AbstractRepeater

org.apache.wicket.markup.html.list.Loop

All Implemented Interfaces:

Serializable, Iterable<Component>, IEventSink, IEventSource, IFeedbackContributor, IConverterLocator, IMetadataContext<Serializable,Component>, IHeaderContributor, IRequestableComponent, IHierarchical<Component>, IClusterable

Direct Known Subclasses:

PagingNavigation

public abstract class Loop
extends AbstractRepeater

A very simple loop component whose model is an Integer defining the number of iterations the loop should render. During rendering, Loop iterates from 0 to getIterations() - 1, creating a new MarkupContainer for each iteration. The MarkupContainer is populated by the Loop subclass by implementing the abstract method populate(LoopItem). The populate() method is called just before the LoopItem container is rendered.

Author:

Juergen Donnerstag, Eelco Hillenius, Jonathan Locke

See Also:

• Serialized Form

Field Summary

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
Loop(String id, int iterations)	Construct.
Loop(String id, IModel<Integer> model)	Construct.

Method Summary

Modifier and Type	Method	Description
final int	getIterations()
protected LoopItem	newItem(int iteration)	Create a new LoopItem for loop at iteration.
protected final void	onPopulate()	Callback to let the repeater know it should populate itself with its items.
protected abstract void	populateItem(LoopItem item)	Populates this loop item.
protected final void	renderChild(Component child)	Render a single child.
protected void	renderItem(LoopItem item)	Renders this loop iteration.
protected Iterator<Component>	renderIterator()	Returns an iterator for the collection of child components to be rendered.

Methods inherited from class org.apache.wicket.markup.repeater.AbstractRepeater

dequeue, getMarkup, onBeforeRender, onRender

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, dequeuePreamble, findChildComponent, findComponentToDequeue, get, getAssociatedMarkup, getAssociatedMarkupStream, getMarkupType, getRegionMarkup, internalAdd, internalInitialize, iterator, iterator, newDequeueContext, onComponentTagBody, onDetach, onInitialize, 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, internalOnModelChanged, internalRenderComponent, internalRenderHead, isActionAuthorized, isAuto, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isInitialized, isRenderAllowed, isRendering, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, markRendering, modelChanged, modelChanging, newMarkupSourcingStrategy, onAfterRender, onComponentTag, 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 java.lang.Iterable

forEach, spliterator

Constructor Details

Loop

public Loop(String id,
 int iterations)

Construct.

Parameters:

id - See Component

iterations - max index of the loop

See Also:

• Component(String, IModel)

Loop

public Loop(String id,
 IModel<Integer> model)

Construct.

Parameters:

id - See Component

model - Must contain a Integer model object

See Also:

• Component(String, IModel)

Method Details

getIterations

public final int getIterations()

Returns:

The number of loop iterations

onPopulate

protected final void onPopulate()

Description copied from class: AbstractRepeater

Callback to let the repeater know it should populate itself with its items.

Specified by:

onPopulate in class AbstractRepeater

See Also:

• Component.onBeforeRender()

newItem

protected LoopItem newItem(int iteration)

Create a new LoopItem for loop at iteration.

Parameters:

iteration - iteration in the loop

Returns:

LoopItem

renderIterator

protected Iterator<Component> renderIterator()

Description copied from class: AbstractRepeater

Returns an iterator for the collection of child components to be rendered. Users can override this to change order of rendered children.

Specified by:

renderIterator in class AbstractRepeater

Returns:

iterator over child components to be rendered

See Also:

• AbstractRepeater.renderIterator()

populateItem

protected abstract void populateItem(LoopItem item)

Populates this loop item.

Parameters:

item - The iteration of the loop

renderChild

protected final void renderChild(Component child)

Description copied from class: AbstractRepeater

Render a single child. This method can be overridden to modify how a single child component is rendered.

Overrides:

renderChild in class AbstractRepeater

Parameters:

child -

renderItem

protected void renderItem(LoopItem item)

Renders this loop iteration.

Parameters:

item - The loop iteration