Okay, I've made some modifications to my config and to the code and am no
longer getting any tapestry exceptions. The only problem I have now is that
nothing happens when I click the expansion icon of the root element in the
tree. The page posts but nothing expands.
I've put logging into my custom ITreeContentProvider implementation and it
is returning true for the hasChildren() method.
At least I'm not getting explosions any longer. Here's' my updated
code/config:
[ .page file]
...
<property-specification name="currentTreeNode"
type="com.jasf.domain.UserProject"/>
<component id="projectTree" type="tacos:Tree">
<binding name="contentProvider" expression="projectTreeProvider"/>
<binding name="value" expression="currentTreeNode"/>
</component>
...
[ end .page file]
[ begin java file]
( I removed everything in beginPageRender() and created a simple getter)
...
public ITreeContentProvider getProjectTreeProvider(){
if(provider == null){
provider = new ProjectTreeContentProvider(getProjects());
}
return provider;
}
...
[end java file]
[begin html file]
<form jwcid="@Form" >
<span jwcid="projectTree" >
<span jwcid="@InsertText" value="ognl:currentTreeNode.project.projectName"
/>
</span>
<input jwcid="@Submit" type="submit" listener="ognl:listeners.formSubmit"
value="Submit" label="Submit"/> <input jwcid="@Submit" listener="ognl:
listeners.goToTimeEntry" value="Cancel" label="Cancel" />
</form>
[end html file]
Thanks for giving me all the help you are. I appreciate it very much.
John
On Apr 12, 2005 9:55 AM, Viktor Szathmary <[EMAIL PROTECTED]> wrote:
>
> hi,
>
> interesting :) couple of things:
>
> - the value binding should never be persistent.
>
> - if you do supply the "state" parameter to the tree, you'll want to
> make sure that the corresponding property in the page is
> persistent="yes" and you have an initial-value.
>
> for example, i'm using the following (in a component that's nested in
> a page - but that shouldn't really matter):
>
> ...
> <property-specification name="treeState" type="java.util.Set"
> persistent="yes" initial-value="new java.util.HashSet()"/>
> ...
> <component id="tree" type="tacos:Tree">
> <binding name="state" expression="treeState"/>
> <binding name="contentProvider" expression="contentProvider"/>
> <binding name="keyProvider"
> expression="@
> [EMAIL PROTECTED]"/>
> <inherited-binding name="value" parameter-name="node"/>
> <binding name="sorter" expression="sorter"/>
> </component>
> ...
>
> here the .java has a getContentProvider() that is dynamic... the
> FileSystemTree example is also reasonably close to what you're trying
> to do... if the problem persist, please send me the full
> stacktrace/error page, so i can tell which property is causing this...
> but basically, the Tree does *not* set persistent properties at all if
> you supply a state parameter with a HashSet, so perhaps the issue is
> somewhere else...
>
> viktor
>
>
> On Apr 12, 2005 12:37 PM, John Gordon <[EMAIL PROTECTED]> wrote:
> > Hey, Viktor,
> >
> > I downloaded the head version of tacos from cvs and built it, but am
> still
> > getting the commit() error. I've tried various configurations for the
> > property-specifications, persistent="yes"; persistent="no", but with no
> > success. The results of trying your ideas follow:
> >
> > 1) no state param supplied: failed if I made the value binding
> persistent
> > (commit() error). If I made the value binding not persistent, the page
> would
> > render, but then I'd get a null error when clicking on an expand icon.
> >
> > 2) I've pretty much been doing this option from the get go. As soon as I
> > turn persistence on, I get the commit() error.
> >
> > 3) I'm not 100% sure what you mean by "supplied by page", but I did set
> > persistence on, but got the commit() error again. setting the
> initial-value
> > of the state map to anything other than HashSet causes a class cast
> > exception.
> >
> > Here's my code:
> >
> > [the .page file: ]
> >
> > ...
> > <property-specification name="projectTreeProvider"
> > type="net.sf.tacos.model.ITreeContentProvider"/>
> > <property-specification name="treeState"
> > persistent="yes"
> > type="java.util.HashSet"
> > initial-value="new java.util.HashSet()"/>
> > <property-specification name="currentTreeNode"
> > type="com.jasf.domain.UserProject"
> > persistent="yes"/>
> > <component id="projectTree" type="tacos:Tree">
> > <binding name="contentProvider" expression="projectTreeProvider"/>
> > <binding name="state" expression="treeState"/>
> > <binding name="value" expression="currentTreeNode"/>
> > </component>
> >
> > [end .page file]
> >
> > [the java file]
> >
> > ...
> > public abstract ITreeContentProvider getProjectTreeProvider();
> > public abstract void setProjectTreeProvider(ITreeContentProvider
> provider);
> > ....
> > /* (non-Javadoc)
> > * @see org.apache.tapestry.IPage#beginPageRender()
> > */
> > public void pageBeginRender(PageEvent event) {
> >
> > setProjectTreeProvider(new ProjectTreeContentProvider(getProjects()));
> >
> > }
> >
> > ...
> > /**
> > * Returns a user's projects.
> > * @return
> > */
> > public List getProjects() {
> >
> > User user = ((Visit)getVisit()).getUser(getRequestCycle());
> >
> > List userProjects = getTimeService().getRootUserProjects(user);
> >
> > log.debug("Found " + userProjects.size() + " projects for user " +
> > user.getUserId() );
> >
> > return userProjects;
> > }
> > ...
> >
> > [end java file]
> >
> > [the html page]
> >
> > <form jwcid="@Form" >
> >
> > <span jwcid="projectTree" >
> > <span jwcid="@InsertText" value="ognl:
> currentTreeNode.project.projectName"
> > />
> > </span>
> > <span jwcid="[EMAIL PROTECTED]" source="ognl:projects"
> > value="ognl:project" >
> > <span jwcid="@ProjectBlock" project="ognl:project" />
> > </span>
> >
> > <input jwcid="@Submit" type="submit" listener="ognl:listeners.formSubmit
> "
> > value="Submit" label="Submit"/> <input jwcid="@Submit" listener="ognl:
> > listeners.goToTimeEntry" value="Cancel" label="Cancel" />
> >
> > </form>
> >
> > [end html page]
> >
> > Do you have a working example of what I'm trying to do? I'm attempting
> to
> > use the tree to display what objects belong to a user. The List that
> feeds
> > my ITreeContentProvider is always being set via a call to Hibernate
> within
> > the beginPageRender() method.
> >
> > One last question: what properties of the tacos:Tree component must be
> > persistent in order for the tree to work?
> >
> > thanks for your input,
> >
> > John
> >
> >
> > On Apr 12, 2005 5:43 AM, Viktor Szathmary <[EMAIL PROTECTED]> wrote:
> > >
> > > hi,
> > >
> > > this is probably not an issue with the contentProvider, but the
> > > initialization sequence of the tree "state" binding. there was a small
> > > bug in the tree component regarding this: the component tried to
> > > default a persistent binding a bit too late - this should be fixed in
> > > CVS head - try building from there. alternatively, try these scenarios
> > > (with the last release):
> > >
> > > 1) no state param supplied at all
> > > 2) state supplied from page property (persistent=yes, but no
> > > initial-value)
> > > 3) state supplied from page (persistent=yes, initial-value="
> > > java.util.HashMap").
> > >
> > > regards,
> > > viktor
> > >
> > >
> > > On Apr 12, 2005 3:21 AM, John Gordon <[EMAIL PROTECTED]> wrote:
> > > > Hi All,
> > > >
> > > > I've been banging my head on this one: I keep running into the
> following
> > > > error in the rendering of a page when trying to use the tacos:Tree
> > > > component:
> > > >
> > > > Page recorder for page [my page name] is locked after a commit()
> > > >
> > > > I must be getting something confused between setting persistence on
> > > abstract
> > > > classes correctly or not fully understanding the rewind/record
> process
> > > > entirely. The Tacos:Tree examples are not a whole bunch of help here
> as
> > > they
> > > > creat static final ITreeContenProvider fields in the page classes.
> I'm
> > > > dynamically generated my ITreecontentProvider with a List of objects
> > > that
> > > > are returned from the hibernate API.
> > > >
> > > > All the code that creates my ITreeContentProvider is done in the
> > > > beginPageRender() method.
> > > >
> > > > Does anyone have an example of using the tacos:Tree component with a
> > > > non-static ITreeContentProvider?
> > > >
> > > > Thanks, I really appreciate it.
> > > >
> > > > John
> > > >
> > > >
> > >
> >
> > --
> > "The present letter is a very long one, simply because I had no leisure
> to
> > make it shorter." -- Blaise Pascal
> > ------------------------------------------------------------------
> > [EMAIL PROTECTED]
> > (m)415.515.3549
> >
> >
>
--
"The present letter is a very long one, simply because I had no leisure to
make it shorter." -- Blaise Pascal
------------------------------------------------------------------
[EMAIL PROTECTED]
