topic Re: Error attempting to obtain child nodes in Alfresco Archive

Error attempting to obtain child nodes

tonygarnet — Tue, 02 Jan 2007 15:00:47 GMT

Hi I have attempted to retireve the children of a node from the repository using: try{ Reference reference = new Reference(STORE, null, path); QueryResult queryResult = null; try{ queryResult = repositoryService.queryChildren(reference); }catch(Exception en){Howe

Re: Error attempting to obtain child nodes

doblek — Tue, 02 Jan 2007 15:25:20 GMT

Hi,

If you know the node UUID from which you want to get its children, give this code a try:

QueryResult qr = WebServiceFactory.getRepositoryService().queryChildren(inNode);
for (int i=0; i<qr.getResultSet().getRows().length; i++){
     node_child.setStore(STORE);
     node_child.setPath(null);
     node_child.setUuid(qr.getResultSet().getRows(i).getNode().getId());
}‍‍‍‍‍‍

That way, in each loop iteration you will have the Reference object (node_child) of each child of the Reference object you specify as inNode.

You have to import:

WebServiceFactory

Reference

Store

QueryResult

Hope that helps.

Regards,
Enrique

Re: Error attempting to obtain child nodes

tonygarnet — Tue, 02 Jan 2007 16:10:01 GMT

Hi Enrique

I take it that the line:
QueryResult qr = WebServiceFactory.getRepositoryService().queryChildren(inNode);
is the same line which generates an error in my code.
From the documentation the "inNode" that you refer to is a Reference.
If this is the case, then my problem still persists, as your intial line will generate the same error.
I may be mistaking what you are saying, are you stating that if I use a UUID to obtain a Reference (I have not met this approach so far), it behaves differently than when you obtain a Reference using:
Reference reference = new Reference(STORE, null, path);

Tony

Re: Error attempting to obtain child nodes

doblek — Tue, 02 Jan 2007 16:31:22 GMT

Hi,

I'm using that code to going through the tree of nodes and I'm not getting any error…

Can you try to add this code:

Store[] stores = WebServiceFactory.getRepositoryService.getStores();
Store STORE = stores[4];       //Index for "SpacesStore" (at least in my computer)

Reference inNode = new Reference();
inNode.setStore(STORE);
inNode.setPath(null);
inNode.setUuid(UUID);          //where UUID is a String with the Node UUID you want to get its children.

//And then the code I gave you in the former post
Reference node_child = new Reference();
QueryResult qr = WebServiceFactory.getRepositoryService().queryChildren(inNode); 
for (int i=0; i<qr.getResultSet().getRows().length; i++){ 
     node_child.setStore(STORE); 
     node_child.setPath(null); 
     node_child.setUuid(qr.getResultSet().getRows(i).getNode().getId());
     //At this point, node_child contains the Node Reference to one child
}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I haven't seen your error before, so I can't help you much with that… sorry. But it seems to be related with the path, that's why I suggest you use UUID instead of the path…

Regards,
Enrique

Re: Error attempting to obtain child nodes

tonygarnet — Wed, 03 Jan 2007 14:46:24 GMT

Hi Enrique
Appreciate the help given, it has worked.
One last question, do you know how to get the name of the child references that are obtained?
I need to be able to distinguish them but node name does not appear to be present in the QueryResult.

Tony

Re: Error attempting to obtain child nodes

doblek — Wed, 03 Jan 2007 15:35:11 GMT

Hi,

Ok. That's good news… 😃

Regarding your question I have to say that, as far as I know, it's *not* possible to get the name of the node… You have to deal with UUID instead. Once you create a node, it is given a unique identifer… Write it down somewhere and try to look if the UUID you're processing at some specific loop iteration matches the UUID you're looking for.

Regards,
Enrique

Re: Error attempting to obtain child nodes

tonygarnet — Thu, 04 Jan 2007 12:57:14 GMT

Hi
I have obtained the name of the node by using :
String name = qr.getResultSet().getRows(i).getColumns()[5].getValue();
As the name of the node is passed as part of the result set.
Your help has been much appreciated.

One other question, How do I obtain the effective start and end date for an aspect.
I have looked at the metadata and the result set, but I do not appear to see it. I would consider that it must be able to be accessed out side of the scope of the aspect that it is defined in?

Tony

Re: Error attempting to obtain child nodes

doblek — Fri, 05 Jan 2007 12:27:19 GMT

Hi,

Hi
I have obtained the name of the node by using :
String name = qr.getResultSet().getRows(i).getColumns()[5].getValue();
As the name of the node is passed as part of the result set.
Your help has been much appreciated.

You're welcome 😃

One other question, How do I obtain the effective start and end date for an aspect.
I have looked at the metadata and the result set, but I do not appear to see it. I would consider that it must be able to be accessed out side of the scope of the aspect that it is defined in?

I don't know too much about "aspects" yet, since I didn't have to deal much with them at the moment… :?
But, as far as I understand from this page in the wiki, it is possible to get the aspect of a node from the queryresult, isn't it?

ResultSet Â» row Â» node Â» aspect

or maybe in metadata… :?

I know I'm not helping you much, but that's all I can do at this moment ops: Sorry

Regards