org.apache.wicket.markup.parser

Class AbstractMarkupFilter

java.lang.Object

org.apache.wicket.markup.parser.AbstractMarkupFilter

All Implemented Interfaces:

IMarkupFilter

Direct Known Subclasses:

AutoLabelTagHandler, ConditionalCommentFilter, EnclosureHandler, HeadForceTagIdHandler, HtmlHandler, HtmlHeaderSectionHandler, HtmlProblemFinder, InlineEnclosureHandler, OpenCloseTagExpander, RelativePathPrefixHandler, RootMarkupFilter, StyleAndScriptIdentifier, WicketContainerTagHandler, WicketLinkTagHandler, WicketMessageTagHandler, WicketNamespaceHandler, WicketRemoveTagHandler, WicketTagIdentifier

public abstract class AbstractMarkupFilter
extends Object
implements IMarkupFilter

Base class for markup filters

Author:

Jonathan Locke, Juergen Donnerstag

Field Summary

Fields

Modifier and Type	Field and Description
protected static MetaDataKey<Map<String,AtomicInteger>>	REQUEST_COUNTER_KEY A key for a request-relative map of counters.

Constructor Summary

Constructors

Constructor and Description
AbstractMarkupFilter() Construct.
AbstractMarkupFilter(MarkupResourceStream markupResourceStream)

Method Summary

Methods

Modifier and Type	Method and Description
protected MarkupResourceStream	getMarkupResourceStream()
IMarkupFilter	getNextFilter() IMarkupFilters are usually chained with the last filter retrieving the elements from the XML parser.
protected int	getRequestUniqueId() Returns an id using the request-relative counter associated with the underlying MarkupResourceStream's owner container (see MarkupResourceStream.getContainerInfo()).
protected String	getWicketNamespace() Extracts the markup namespace from the MarkupResourceStream passed at creation time.
protected String	getWicketNamespace(MarkupStream markupStream) Extracts the markup namespace from the passed MarkupStream if available, or from the MarkupResourceStream passed at creation time.
MarkupElement	nextElement() Get the next xml element from the markup.
protected abstract MarkupElement	onComponentTag(ComponentTag tag) Invoked when a ComponentTag was found.
protected MarkupElement	onSpecialTag(HtmlSpecialTag tag) Invoked when a tags (e.g.
void	postProcess(Markup markup) Called after all filters have been processed.
void	setNextFilter(IMarkupFilter parent) Set new parent.

Methods inherited from class java.lang.Object

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

Field Detail

REQUEST_COUNTER_KEY

protected static final MetaDataKey<Map<String,AtomicInteger>> REQUEST_COUNTER_KEY

A key for a request-relative map of counters. As map keys we use the class name of the MarkupResourceStream's owner container (see MarkupResourceStream.getContainerInfo()), meaning that each container has its own counter. The counters are used by getRequestUniqueId() to get unique ids for markup tags.

Constructor Detail

AbstractMarkupFilter

public AbstractMarkupFilter()

Construct.

AbstractMarkupFilter

public AbstractMarkupFilter(MarkupResourceStream markupResourceStream)

Method Detail

getNextFilter

public IMarkupFilter getNextFilter()

Description copied from interface: IMarkupFilter

IMarkupFilters are usually chained with the last filter retrieving the elements from the XML parser.

Specified by:

getNextFilter in interface IMarkupFilter

Returns:

The next MarkupFilter in the chain

setNextFilter

public void setNextFilter(IMarkupFilter parent)

Set new parent.

Specified by:

setNextFilter in interface IMarkupFilter

Parameters:

parent - The parent of this component The next element in the chain

nextElement

public MarkupElement nextElement()
                          throws ParseException

Get the next xml element from the markup. If eof, than retun null. Ignore raw markup. Invoke nextTag(tag) if a tag was found.

Specified by:

nextElement in interface IMarkupFilter

Returns:

Return the next eligible MarkupElement. Null, if no more found.

Throws:

ParseException

onComponentTag

protected abstract MarkupElement onComponentTag(ComponentTag tag)
                                         throws ParseException

Invoked when a ComponentTag was found.

By default this method is also called for WicketTags.

Parameters:

tag -

Returns:

Usually the same as the tag attribute

Throws:

ParseException

onSpecialTag

protected MarkupElement onSpecialTag(HtmlSpecialTag tag)
                              throws ParseException

Invoked when a tags (e.g. DOCTYPE, PROCESSING_INSTRUCTIION, etc. which have been identified as special tags by the xml parser.

Parameters:

tag -

Returns:

Usually the same as the tag attribute

Throws:

ParseException

postProcess

public void postProcess(Markup markup)

Description copied from interface: IMarkupFilter

Called after all filters have been processed.

Specified by:

postProcess in interface IMarkupFilter

getMarkupResourceStream

protected MarkupResourceStream getMarkupResourceStream()

getWicketNamespace

protected String getWicketNamespace()

Extracts the markup namespace from the MarkupResourceStream passed at creation time.

There are two versions of this method because most IMarkupFilter's have dual personality - IMarkupFilter (one instance per MarkupParser) and IComponentResolver (one instance per application).

Returns:

the namespace of the loaded markup

getWicketNamespace

protected String getWicketNamespace(MarkupStream markupStream)

Extracts the markup namespace from the passed MarkupStream if available, or from the MarkupResourceStream passed at creation time.

There are two versions of this method because most IMarkupFilter's have dual personality - IMarkupFilter (one instance per MarkupParser) and IComponentResolver (one instance per application).

Parameters:

markupStream - the markup stream

Returns:

namespace extracted from the markup

getRequestUniqueId

protected int getRequestUniqueId()

Returns an id using the request-relative counter associated with the underlying MarkupResourceStream's owner container (see MarkupResourceStream.getContainerInfo()). This can be useful for autocomponent tags that need to get a tag id.

Returns:

the request-relative id