The wicket team is pleased to announce the Wicket 0.9.18-beta release!
http://wicket.sourceforge.net
Wicket is a Java web application framework that takes simplicity, separation
of concerns and ease of development to a whole new level. Wicket pages can be
mocked up, previewed and later revised using standard WYSIWYG HTML design
tools. Dynamic content processing and form handling is all handled in Java
code using a first-class component model backed by POJO data beans that can
easily be persisted with frameworks like Hibernate.
Changes in this version include:
New Features:
o Added ButtonImage DynamicImage subclass and added to images example.
o Added Button class and Form buttons support. When a class has one button,
it works pretty much as before. But when it has two or more buttons, the
onSubmit() handler is called on the button which submitted the Form. Issue:
1119620.
o Added getSharing() method to Component with values UNSHARED,
APPLICATION_SHARED and SESSION_SHARED (see javadoc for details). Changed
the AbstractImage class so that it allows a component user to set the
sharing mode for an image to one of these values. When an image is
SESSION_SHARED, it will have a stable URL within a given session. When an
image is APPLICATION_SHARED, it will have a stable URL across all sessions
in an application. So, to implement a really efficient dynamic image,
simply store the image component in a static variable and set its sharing
to APPLICATION_SHARED. Now you will have one object that is shared
everywhere that has a stable URL. None of this requires access to temporary
storage. One catch that might come up is that shared components will have a
URL like /applicationName/a0 for application shared components or
/applicationName/s0 for session shared components. In order for an
application to handle such URLs it must have a servlet url mapping pattern
that includes /* on the end, such as /images/*. Also updated image example
to demonstrate all this.
Fixed bugs:
o Added emptyAllowedto the AbstractChoiceclass allowing the select components
to set the model value to null. Issue: 1123536.
o Changed selected attribute to selected = "selected" to be XHTML compliant.
Added ComponentTag.syntheticCloseTagString() method which returns a close
tag for the given component tag. Changed Juergen's fix to Panel use this
method and then added another call to the same method to
renderClosingComponentTag, which had been ignoring generation of close tags
on /all/ openclose tags. This problem was actually a bug in HelloWorld, if
you changed the <span> tag to a <span/> tag! Issue: 1120137.
o Fixed JavaScript issue that resulted in problems with Firefox.
o The getResource() method in Image now uses the new
findParentWithAssociatedMarkup() method to find the nearest parent with
associated markup, which it then uses as the base class for image loading.
This should always be right for Images since they are referenced from
markup and findParentWithAssociatedMarkup() should always find that markup.
Issue: 1121946.
o Added ResourceComponent base class for components that provide resources by
implementing IResourceListener. There doesn't appear to be an easy way to
generalize this to Pages since they inherit from Component and since their
behavior is quite different. Also changed IResource.getExtension() to
getContentType() and changed the implementation of this interface in
Resource to use the JDK's FileNameMap class to map from filenames to mime
types. Issue: 1121959.
o Changed DefaultPageFactory so that it always tries default constructor if
PageParameters constructor cannot be found and one exists. Issue: 1119725.
o Restructured class hierarchy for converters a little so that all integral
converters such as IntegerConverter extend AbstractIntegerConverter. Then
made getNumberFormat() in AbstractNumberConverter abstract and implemented
it in AbstractIntegerConverter by creating an integer NumberFormat instance
and then turning grouping off and integer-only on. I like this fix because
it really respects i18n, which is sometimes very complex stuff. Issue:
1119560.
o Reworked conversion code to deal with the fact that the java.text Format
parsing parses /leading/ values and not complete values. In other words, it
sees 10foo and parses an Integer without throwing an Exception. The
resulting code is smaller, more efficient (since it doesn't rely on
exceptions to signal bad parses) and better structured. Also changed the
ConversionException class so that it stores the Format used for the
conversion instead of just a String 'pattern'. Issue: 1118466.
o Fixed problem with autolink component resolver where it would continually
resolve the same links on every render. The solution is to set the
component's name when the auto-id is generated so that it can be found in
the container the next time (so the resolver doesn't get called again).
Also moved the AutolinkComponentResolver class into markup.html since it is
html specific. Issue: 1118784.
o The Component.getModelLock() method was changed to respond more
appropriately when a real model doesn't exist. The code now returns model
(without attaching it) if model is non-null and new Object() as a dummy
lock if model is null. Issue: 1118413.
o Fix for unreported synchronization bug in ModificationWatcher where a
ConcurrentModificationException can be thrown if the entries to be watched
are modified while polling is going on (which takes a while). The solution
was to make a defensive copy rather than holding a lock since that might
introduce liveness issues since iterating the list of files and checking
all their timestamps might take a while.
o Added Page.reset() method that is called when runtime exceptions prevent
full rendering of pages. I highly suspect this is behind bug 1116800 where
Eelco reported that "Exception when rendering leaves markup in invalid
state". Issue: 1116800.
o Added BufferedHttpResponse class, along with
ApplicationSettings.setBufferResponse to enable response buffering.
Response buffering is on by default. Issue: 1116805.
o Implemented getModelLock() method on Component so that client code can
synchronize updates to the model for a component. Updated core code so that
it synchronizes on the returned lock object (which is currently the model's
object as returned by IModel.getObject()) during rendering and form model
updating. This lack of synchronization was a bug in the guestbook
application which never showed symptoms simply because it had never been
used by many users at once.
o Fixed guestbook test and other problems with example tests.
o Made examples work from http://localhost:8080 via redirecting.
o Created FAQ page and added an explanation of why so many classes and
methods are final Issue: 1113613.
o Added comments and refactored renderBody to the more illustrative name
renderComponentTagBody. Also changed names throughout the project to match
this pattern. Simplified renderComponentTag() by folding in
stripComponentName() logic and removed the overload of that method which
advances the markup stream in addition to rendering the tag. Issue:
1091897.
o Closed request to make RawMarkup class public since we do not want to
expose this implementation detail. Issue: 1092016.
o Changed parser to allow single quotes as well as double quotes around
attribute values in XML tags. Issue: 1091288.
o Fixed bug where popups expire due to removeNewerThan call in
HttpRequestCycle. Also removed the method itself since it is not used for
any other purpose. Issue: 1106563.
o Closed RFE to allow custom object properties on ApplicationSettings since
ApplicationSettings is really only for Wicket configuration. To store
"global" objects for your application, just put regular old Java properties
on your Application subclass. If I'm somehow missing your point, please
reopen the bug and explain why subclassing Application won't provide the
functionality you need. Issue: 1100078.
o Closed old RFE for license aggregation since we already have the licenses
available in the licenses folder in the core. Issue: 1032465.
Changes:
o Enhanced WicketComponentTree and added this diagnostic to the bottom of the
ExceptionErrorPage.
o Reorganized components and examples for final 1.0 structure. This included
moving sortable list view and sign in panel to wicket-contrib and
SmartLinkLabel classes to wicket-extensions. Also moved ButtonImageResource
to wicket-extensions. In the process, fixed a bug in localized images where
they would not change when the session locale was changed. Added an early
sketch of stylesheet stuff to sandbox. Trimmed down examples index to just
the examples most relevant to wicket core and extensions.
o Moved tree to contrib until packaged CSS is supported.
o Tree now images instead of image names and attribute modifiers. Also, some
default images that work well with a regular tree are pacakged and used by
default.
o The tree component is now greatly simplified. Users are not required to use
unique user objects, but instead the tree nodes are used. Also, as a result
of a different rendering strategy, normal links can be used. The IndentTree
is now the default tree. Removed the nested tree as that tree had several
usability issues.
o Major refactor of resource handling to separate resource referencing
components from the actual resources themselves. Added new Resource base
class in wicket top level package. WebResource extends this and
AbstractImage extends that. the Image subclass of AbstractImage is the only
component for now. It can be either attached to an IMG tag with a src
attribute or it can be given a DynamicImageResource and it will draw that.
o Changed methods taking Resource as a parameter to IResource for increased
generality. Then added IModifiable interface to IResource to ensure all
resources have a last modified time. This will be key in getting browser
caching to work correctly. Finally, created AbstractResource and subclasses
FileResource and UrlResource and moved the static Resource.locate methods
into ResourceLocator.
o Made Link.onLinkClicked() final and added an onClick() method that it
calls. This avoids exposing the interface method to subclassing directly.
Did a similar thing to Form by making onFormSubmitted() final and exposing
onValidate() as the overridable method. Also did a little early refactoring
of resources that should affect nobody.
o Renamed handleX() methods and other events to conform to the onX() pattern.
o Created AbstractImage base class and simplified code in Image.
o Restructed image component hierarchy to deal with clustering issues that
Chris brought up. Changed example to demonstrate both BufferedDynamicImages
(which will have a potentially large size when replicated across a cluster)
and DynamicImages which draw themselves when they are requested. Caching
issues are not addressed by this change, but I will be working on that
soon.
o Changed HtmlPage to WebPage, HtmlContainer to WebContainer and
HtmlComponent to WebComponent for friendliness and consistency with http
protocol package.
o Added constructors to TextField that take a class as the last argument.
TextFields constructed with a type like this are considered typed and will
automatically have a type validator attached to them. In addition, even if
the field is not attached to a PropertyModel, conversions will be performed
to/from the given type. Also, changed invalid to handleInvalid() and added
handleValid(). This allows updateModel() to simply focus on doing that.
Finally, worked on forminput to ensure validation works completely. Renamed
the horribly named DecimalValidator to IntegerValidator and used all of
this to simplify the forminput example.
o Changed inheritance hierarchy of text form components and added an abstract
base class AbstractTextComponent. Now PasswordTextField inherits from
TextField and TextField inherits from AbstractTextComponent. TextArea also
inherits from AbstractTextComponent. This restructuing got rid of some
duplication of methods and fields among the text components.
o Reworked signin panel and signin examples, including the library example so
that they work with the new session factory model. Also added remember me
functionality to the signin panel and moved localizations of the signin
panel into the core.
o Added ISessionFactory interface for creating sessions and added an abstract
method getSessionFactory() to Application so applications can implement
their own session factories. Since the downcasting of getProperty() is
obviated by this, removed session properties. Will add a FAQ entry on how
to set values on a session using the session factory approach since this
will come up /a lot/.
o Reworked examples navigation. Worked on code for GuestBook and GuestBook2.
Provided base classes for future examples to extend
(WicketExampleApplication, WicketExamplePage).
o Reworked feedback messages code significantly including the
FeedbackMessages container class. Removed all the thread-local code and put
feedback messages into Page instead. Added info(), debug(), warning(),
error() and fatal() convenience methods to Component which report messages
via the Page's FeedbackMessages container object.
o Wrote a new persistence abstraction that is more abstract and free of
Cookieness (IValuePersister). Implemented this interface using browser
cookies in the new class CookieValuePersister.
o Got rid of ValidationErrorDecorator and other code by doing a major
refactor of the form validation package.
o Split up ApplicationSettings and ApplicationPages and moved many of the
non-settings getters to Application.
o Major reworking of converter code. Folded localized converters into a
single set of converters, removing casts to ILocalizable in the process.
Implemented converters for all Java primitive types plus Date, Timestamp
and String. Added javadoc documentation for converter API. Refactored
Component, TypeValidator and Session code to use the new converter code and
to enable customization through overrides of getConverter(). Wrote new
tests for converters.
o Refactored ComponentTagAttributeModifier and changed name to
AttributeModifier. Made more of this class private and removed
inappropriate tests of private API.
o Renamed IIdList -> IDetachableChoiceList and IdListAdaptor ->
DetachableChoiceList
o Renamed IPageLink.getPageClass() -> IPageLink.getPageIdentity()
Removed features:
o Removed IModel constructors throughout the project and added instanceof
logic to Component to wrap model objects unless they are already IModel
implementors. Updated documentation to reflect this.
Have fun!
-The wicket team
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