Update help

, ,
1

I have an xml file like the following.I have to get the “text” of B element




text




so i query for /root/A/B to retrieve what i need.(response.getFirstXMLObject()) I do some operation on this node
(i.e. update) and at the end i have to commit these changes to the database.
But we all known that partial updates are not allowed in the current version of Tamino and
for this reason i would like to get the root element and then update can be possible.
I’m using JDOM and with a method recursive like this

public Element getRootElement(Element element){

if(element.isRootElement())
return element;
else{
Element newelement = element.getParent();
return (getRootElement(newelement));
}

}

i get the root element, but the root element obtined is…

<ino:response xmlns:ino=“http://namespaces.softwareag.com/tamino/response2” xmln
s:xql=“XQL FAQ (XML Query Language - Frequently Asked Questions)”>
xql:query/root/A/B</xql:query>
<ino:message ino:returnvalue=“0”>
ino:messagelineXQL Request processing</ino:messageline>
</ino:message>
xql:result
text

</xql:result>
<ino:message ino:returnvalue=“0”>
ino:messagelineXQL Request processed</ino:messageline>
</ino:message>
</ino:response>

how can i reach my real root element in a way that the accessor.update will be possible?
The solution i have implemented for the moment is querying /root and then i discend and navigate
the tree to the element B, but i’m looking for a smart and more elegant solution because in this
case if i change the name of one element or i change the schema i need to change also my java code
instead with the other solution only a changed query is required…
Hope someone help me.

BRGS
@nto

2

Hi,

I think you have three options. You can wait for Tamino 4 which has native support for update of XML subtrees. You could instead use the add-on NodeLevelUpdate supplied with Tamino currently (if you are using Microsoft IIS). Finally you could continue to use your method of querying /root and then navigating to the element but you could set the value of in a properties file for your application. Then if your schema changes you just change your properties file to reflect that change.

HTH

3

When will be relased T4?For NodeLevelUpdate i’m afraid but i’m using Apache …but i’m interested in your third solution…what do you mean with " you could set the value of in a properties file for your application."
How can realize it?

Thanks
@nto

4

Look at class “java.util.Properties” in your Java Documentation for a full description of Properties and their use.

For example, create a Properties file (just a text file called “myApp.properties” in this example) containing “parameter=value”.

Then in your code you can:

Define a Properties object:
Properties myProps = new Properties();

Load the Properties values from your file:
FileInputStream in = new FileInputStream(“myApp.properties”);
myProps.load(in);

Put the parameter value into a String:
String myParm = myProps.getProperty(“parameter”,“default value”);

At this point, myParm has the value “value”, and now you can process code depending on the value you found…

Tamino V4 is due quite soon!
HTH