Is there any way to only rerender the contents of a specific HtmlTreeNodesAdaptor?

[lrp]

Given a specific HtmlTreeNodesAdaptor component, can I instruct the framework to only rerender that? So far I've tried the following ways:

- Calling AjaxContext.getCurrentInstance().addComponentToAjaxRender() with the adaptor as an argument.

- Calling AjaxContext.getCurrentInstance().addComponentToAjaxRender() with the HtmlTreeNode component under the adaptor as an argument.

- Specifying the id of the adaptor as the rerender argument of the action that changes the adaptor's contents.

- Specifying the id of the HtmlTreeNode component under the adaptor as the rerender argument of the action that changes the adaptor's contents.

All of these result in "java.lang.IllegalStateException: No tree element available or row key not set!". The only way I have found to do this so far is by rerendering the entire tree, which doesn't strike me as very performance-friendly on large trees.

I'm guessing it might be possible by calling tree.addRequestKey(), but I'm not sure how I can get the RowKey of the adaptor or its underlying node component. Any advice on this issue would be greatly appreciated.

Regards,

Lars-Remi Pettersen

[lrp]

Does really no one have an idea as to how this can be done? When I drop elements on the adaptor node, I'm able to access the row key from the drop event, so I really see no reason it shouldn't be possible to access it at other times too, I just need some way to translate from an HtmlTreeNodesAdaptor or an HtmlTreeNode object to one or more row keys.

At the moment I'm rerendering the entire tree on changes, but that's not very performance friendly when many branches are open. It would be a huge boost if I was able to just rerender the adaptor or node for the branch that the change happened in.

[nbelaevski]

Hi,

To create row key use TreeRowKey that contains org.richfaces.model.StackingTreeModelKey as generic value type.

[lrp]

Hey Nick. I tried doing the following:

List<StackingTreeModelKey<Integer>> keyList = new ArrayList<StackingTreeModelKey<Integer>>();
keyList.add(new StackingTreeModelKey<Integer>("idOfAdaptor", 0));
TreeRowKey<StackingTreeModelKey<Integer>> key = new ListRowKey<StackingTreeModelKey<Integer>>(keyList);
tree.addRequestKey(key);

I figured that this would give me the key for the node at index 0 in the adaptor with the specified id. However, that results in the following exception:

java.lang.NullPointerException
    at org.richfaces.model.StackingTreeModel.getInternalModelById(StackingTreeModel.java:354)
    at org.richfaces.model.StackingTreeModel.doSetupKey(StackingTreeModel.java:154)
    at org.richfaces.model.StackingTreeModel.setupKey(StackingTreeModel.java:191)
    at org.richfaces.model.StackingTreeModel.setRowKey(StackingTreeModel.java:497)
    at org.richfaces.model.StackingTreeModel.setRowKey(StackingTreeModel.java:493)
    at org.ajax4jsf.component.UIDataAdaptorBase.setRowKey(UIDataAdaptorBase.java:351)
    at org.richfaces.renderkit.TreeRendererBase.encodeAjaxChildren(TreeRendererBase.java:457)
    at org.ajax4jsf.component.UIDataAdaptorBase.encodeAjaxChild(UIDataAdaptorBase.java:454)
    at

So I'm guessing I've set the key up incorrectly. Could you possibly clarify the steps for making a key a little more?

[nbelaevski]

As far as I remember, this is correct way to create key for these models. How does page code look like?

[lrp]

The code is a bit big and complex, so I don't think it'll help much to show it here in any detail. I'll see if I can find the time to make a small example project that reproduces the problem.

[nbelaevski]

To be sure, you can compare existing rowKey (taken from "rowKeyVar" or just UITree component) with the manually created in debugger.

[lrp]

I'll try that.

By the way, this isn't a recursive adaptor, but an adaptor nested in another adaptor. Could that be causing problems when making the key (and only referring to the id of the innermost adaptor)?

[nbelaevski]

Yes, this can be a problem. Key should include IDs & keys of all ancestor adaptors, not the innermost one.

[lrp]

Yes, I can see that it doesn't give an error when trying the same approach on one of the top level adaptors.

I just tried doing as pasted below:

List<StackingTreeModelKey<Integer>> keyList = new ArrayList<StackingTreeModelKey<Integer>>();
keyList.add(new StackingTreeModelKey<Integer>("topLevelAdaptorId", 0));
keyList.add(new StackingTreeModelKey<Integer>("innermostAdaptorId", 0));
TreeRowKey<StackingTreeModelKey<Integer>> key = new ListRowKey<StackingTreeModelKey<Integer>>(keyList);

This seems to work, and it gives no errors. Am I right in assuming that this would give me a key for "topLevelAdaptorId:0:innermostAdaptorId:0" and only rerender the innermost one, without rerendering the entire top level one?

[nbelaevski]

Yes, that's right.

[lrp]

Excellent. Thanks a lot, I doubt I'd have been able to figure this out without your help!