org.apache.wicket.markup.html.panel
Class Fragment

java.lang.Object
  org.apache.wicket.Component
      org.apache.wicket.MarkupContainer
          org.apache.wicket.markup.html.WebMarkupContainer
              org.apache.wicket.markup.html.WebMarkupContainerWithAssociatedMarkup
                  org.apache.wicket.markup.html.panel.Fragment

All Implemented Interfaces:

java.io.Serializable, IClusterable, IConverterLocator, IHeaderPartContainerProvider

public class Fragment
extends WebMarkupContainerWithAssociatedMarkup

Usually you either have a markup file or a xml tag with wicket:id="myComponent" to associate markup with a component. However in some rare cases, especially when working with small panels it is a bit awkward to maintain tiny pieces of markup in plenty of panel markup files. Use cases are for example list views where list items are different depending on a state.

Fragments provide a means to maintain the panels tiny piece of markup. Since it can be anywhere, the component whose markup contains the fragment's markup must be provided (markup provider).

  <span wicket:id="myPanel">Example input (will be removed)</span>
 
  <wicket:fragment wicket:id="frag1">panel 1</wicket:fragment>
  <wicket:fragment wicket:id="frag2">panel 2</wicket:fragment>
 

  add(new Fragment("myPanel1", "frag1", myPage);
 

Author:

Juergen Donnerstag

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.Component

Component.ComponentModelChange, Component.EnabledChange, Component.IVisitor, Component.VisibilityChange

Field Summary

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED6, FLAG_RESERVED7, FLAG_RESERVED8, PATH_SEPARATOR, RENDER

Constructor Summary

Fragment(java.lang.String id, java.lang.String markupId)
Deprecated. use Fragment(String, String, MarkupContainer)

Fragment(java.lang.String id, java.lang.String markupId, IModel model)
Deprecated. use Fragment(String, String, MarkupContainer, IModel)

Fragment(java.lang.String id, java.lang.String markupId, MarkupContainer markupProvider)
Constructor.

Fragment(java.lang.String id, java.lang.String markupId, MarkupContainer markupProvider, IModel model)
Constructor.

Method Summary

protected MarkupStream	chooseMarkupStream(MarkupStream markupStream) Get the markup stream which shall be used to search for the fragment
MarkupStream	findComponentIndex(java.lang.String path) Position the markup stream at the child component relative to the provider markup
MarkupStream	getAssociatedMarkupStream(boolean throwException) Gets a fresh markup stream that contains the (immutable) markup resource for this class.
MarkupContainer	getMarkupProvider() Returns markup provider associated with this fragment
boolean	hasAssociatedMarkup()
protected void	onComponentTag(ComponentTag tag) Make sure we open up open-close tags to open-body-close
protected void	onComponentTagBody(MarkupStream markupStream, ComponentTag openTag) Handle the container's body.
void	setMarkupTagReferenceId(java.lang.String markupId) The associated markup fragment can be modified

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

newHeaderPartContainer, renderHeadFromAssociatedMarkupFile

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

getMarkupType, getWebPage

Methods inherited from class org.apache.wicket.MarkupContainer

add, addOrReplace, autoAdd, autoAdd, contains, findMarkupStream, get, getMarkupStream, internalAdd, isTransparentResolver, iterator, iterator, newMarkupResourceStream, onRender, remove, remove, removeAll, renderAll, renderAssociatedMarkup, renderComponentTagBody, replace, setMarkupStream, setModel, size, toString, toString, visitChildren, visitChildren

Methods inherited from class org.apache.wicket.Component

add, addStateChange, afterRender, beforeRender, callOnBeforeRenderIfNotVisible, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, continueToOriginalDestination, debug, detach, detachBehaviors, detachModel, detachModels, determineVisibility, error, exceptionMessage, fatal, findPage, findParent, findParentWithAssociatedMarkup, getApplication, getBehaviors, getBehaviors, getClassRelativePath, getComponentBorder, getConverter, getConverter, getEscapeModelStrings, getFeedbackMessage, getFlag, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkupAttributes, getMarkupId, getMarkupId, getMetaData, getModel, getModelComparator, getModelObject, getModelObjectAsString, getModelObjectAsString, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageFactory, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getResponse, getSession, getSizeInBytes, getStatelessHint, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, initModel, internalAttach, internalDetach, internalOnAttach, internalOnDetach, internalOnModelChanged, isActionAuthorized, isAncestorOf, isAttached, isBehaviorAccepted, isEnableAllowed, isEnabled, isIgnoreAttributeModifier, isRenderAllowed, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, locateMarkupStream, markAttached, markRendering, modelChanged, modelChanging, newPage, newPage, onAfterRender, onAttach, onBeforeRender, onBeginRequest, onDetach, onEndRequest, onModelChanged, onModelChanging, prepareForRender, redirectToInterceptPage, remove, remove, render, render, renderComponent, renderComponent, renderComponentTag, rendered, renderHead, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, setAuto, setComponentBorder, setEnabled, setEscapeModelStrings, setFlag, setFlag, setIgnoreAttributeModifier, setMarkupId, setMetaData, setModelObject, setOutputMarkupId, setOutputMarkupPlaceholderTag, setRedirect, setRenderBodyOnly, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, urlFor, urlFor, urlFor, urlFor, urlFor, urlFor, visitParents, warn, wrap

Methods inherited from class java.lang.Object

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

Constructor Detail

Fragment

public Fragment(java.lang.String id,
                java.lang.String markupId)

Deprecated. use Fragment(String, String, MarkupContainer)

Constructor.

Parameters:

id - The component id

markupId - The associated id of the associated markup fragment

See Also:

Component.Component(String)

Fragment

public Fragment(java.lang.String id,
                java.lang.String markupId,
                IModel model)

Deprecated. use Fragment(String, String, MarkupContainer, IModel)

Constructor.

Parameters:

id - The component id

markupId - The associated id of the associated markup fragment

model - The model for this fragment

See Also:

Component.Component(String)

Fragment

public Fragment(java.lang.String id,
                java.lang.String markupId,
                MarkupContainer markupProvider)

Constructor.

Parameters:

id - The component id

markupId - The associated id of the associated markup fragment

markupProvider - The component whose markup contains the fragment's markup

See Also:

Component.Component(String)

Fragment

public Fragment(java.lang.String id,
                java.lang.String markupId,
                MarkupContainer markupProvider,
                IModel model)

Constructor.

Parameters:

id - The component id

markupId - The associated id of the associated markup fragment

markupProvider - The component whose markup contains the fragment's markup

model - The model for this fragment

See Also:

Component.Component(String)

Method Detail

setMarkupTagReferenceId

public final void setMarkupTagReferenceId(java.lang.String markupId)

The associated markup fragment can be modified

Parameters:

markupId -

onComponentTag

protected void onComponentTag(ComponentTag tag)

Make sure we open up open-close tags to open-body-close

Overrides:

onComponentTag in class Component

Parameters:

tag - Tag to modify

See Also:

Component.onComponentTag(org.apache.wicket.markup.ComponentTag)

onComponentTagBody

protected void onComponentTagBody(MarkupStream markupStream,
                                  ComponentTag openTag)

Description copied from class: MarkupContainer

Handle the container's body. If your override of this method does not advance the markup stream to the close tag for the openTag, a runtime exception will be thrown by the framework.

Overrides:

onComponentTagBody in class MarkupContainer

Parameters:

markupStream - The markup stream

openTag - The open tag for the body

See Also:

Component.onComponentTagBody(org.apache.wicket.markup.MarkupStream, org.apache.wicket.markup.ComponentTag)

chooseMarkupStream

protected MarkupStream chooseMarkupStream(MarkupStream markupStream)

Get the markup stream which shall be used to search for the fragment

Parameters:

markupStream - The markup stream is associated with the component (not the fragment)

Returns:

The markup stream to be used to find the fragment markup

findComponentIndex

public MarkupStream findComponentIndex(java.lang.String path)

Position the markup stream at the child component relative to the provider markup

Parameters:

path -

Returns:

The markup stream for the given component.

hasAssociatedMarkup

public boolean hasAssociatedMarkup()

Overrides:

hasAssociatedMarkup in class MarkupContainer

Returns:

True if this markup container has associated markup

See Also:

MarkupContainer.hasAssociatedMarkup()

getAssociatedMarkupStream

public MarkupStream getAssociatedMarkupStream(boolean throwException)

Description copied from class: MarkupContainer

Gets a fresh markup stream that contains the (immutable) markup resource for this class.

Overrides:

getAssociatedMarkupStream in class MarkupContainer

Parameters:

throwException - If true, throw an exception, if markup could not be found

Returns:

A stream of MarkupElement elements

See Also:

MarkupContainer.getAssociatedMarkupStream(boolean)

getMarkupProvider

public final MarkupContainer getMarkupProvider()

Returns markup provider associated with this fragment

Returns:

markup provider