Am 05.05.2011 16:49, schrieb Sergio Criales:
I did that you explain, and I wasn't able to insert thet new node:
List keyss = config1.getList("presentacion/movil/key");
System.out.println("Lista de keys: " + keyss);
keyss.add(2, "2.5");
config1.setProperty("presentacion/movil/key", keyss);
the message was java.lang.IllegalArgumentException: prepareAdd: Passed
in key must contain a whitespace!
Ah, I see. My example does not work correctly with the XPath expression
engine which is used by you. As a workaround you can try to replace the
setProperty() call by a combination of clearProperty() and
addProperty(). However, the key passed to addProperty() must be
different than the key passed to clearProperty() because it has to
comply to the special syntax used by the XPath expression engine for
adding new properties. Details about these keys can be found in [1].
[1]
http://commons.apache.org/configuration/userguide/howto_xml.html#The_XPATH_expression_engine
and the xml is
<?xml version="1.0" encoding="UTF-8"?>
<repositorio ss="">
<presentacion>
<movil>
<key>uno</key>
<key>dos</key>
<key>tres</key>
<key>cuatro</key>
</movil>
</presentacion>
</repositorio>
Well, then I found this solution please check if it is right:
I used the document directly to insert the new node doing this:
Document document = config.getDocument();
Element nuevoKey = document.createElement("key");
nuevoKey.setAttribute("name", leaf.getName());
nuevoKey.setTextContent("temporal");
and then add this element whith
element.insertBefore(nuevoKey, key);
key is the node where I want to insert the new node before
then to leave the config consistent I did this
String xmlSource = XmlUtils.getStringFromDom(document);
config.clear();
config.load(new StringReader(xmlSource));
Yes, this solution looks good - despite the fact that Commons
Configuration does not support you very well for your use case.
Oliver
thanks in advance,
Sergio Criales
2011/4/21 Oliver Heger<[email protected]>:
Am 20.04.2011 22:14, schrieb Paul Benedict:
If the ordering matters, I would introduce a new OrderedConfiguration
interface for greater positioning control.
Yes, this is a completely new feature. However, I fear that its
implementation won't be straightforward.
Currently, the hierarchical configuration implementation uses the
ConfigurationNode interface to update its internal node structure. The
cleanest solution is probably to extend this interface by an insert()
method. But this would break binary compatibility and thus require a major
release.
@Sergio: If you only have simple structures like a list with nodes and
values (and no child nodes or even complex sub trees), the following
approach should work:
- Call getList() with the correct key to obtain the current values of the
nodes affected.
- Insert the new node value at the desired position in the list.
- Call setProperty() with the same key and the modified list. This will
update the nodes structure correspondingly.
But as I said, this only works for simple scenarios.
Oliver
On Wed, Apr 20, 2011 at 3:02 PM, Oliver Heger
<[email protected]>wrote:
Hi Sergio,
Am 20.04.2011 16:03, schrieb Sergio Criales:
Hi There,
I want to add a node before another node, but in the API I wasn' t
able to find how to do it, please any ideas to do this???
Sergio Criales
this is indeed a good question! With the standard API defined by the
Configuration interface there does not seem to be an obvious solution for
this problem. All methods for adding properties append the new node(s) to
existing ones.
Also the ConfigurationNode API (which represents the nodes stored in a
hierarchical configuration) does not support inserting a child node at a
specified position.
Obviously, nobody had this requirement before. Does anybody else have an
idea?
Oliver
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