string manipuation

[Mohit Sinha]

Hi All

I am receiving a String content from a method which is a chunk of xml.
The xml is something like this
<parent1>
<child>blahblah</child>
other tags
</parent1>

Or i can recive some thing like this

<parent2>
<child1>blahblah</child1>
other tags
</parent2>


The input xml i recieve will vary dynamically. What i want to do is interspere a fe xml tags just before the closing tag (</parent1> or </parent2> in this case.

Can someone tell me what would be a neat way of doing the same


Regards

[Paul Sturrock]

Not sure I follow what you are trying to do. Can you post a before and after example of the XML?

[Mohit Sinha]

Hi Paul,

Thanks for the response.

Currently I have to write a method which gets a xml payload. We will not be actually using xml parsing & validation here.

So I have to interspere an xml tag inside the xml payload which i receive as input.

So say I have the before xml something like this
****************
<parent1>
<child>blahblah</child>
</parent1>
****************
The after xml should be something like this

****************
<parent1>
<child>blahblah</child>
<newtag>content</newtag>
</parent1>
****************

I have to acheive this via string manipulation.

Regards,

[Wanderlei C. A. Souza]

I recommend some XML framework, it will make the things easier.

Try Jakarta Betwixt (http://jakarta.apache.org/commons/betwixt/)
or Castor (http://www.castor.org/xml-framework.html)

=)

[Henry Wong]

This can be easily done with regular expressions... Try...

public static String addXmlPayload(String origxml, String addxml) {
  Pattern p = Pattern.compile("(<(.*?)>.*)(</\\2>)", Pattern.DOTALL);
  Matcher m = p.matcher(origxml);
 
  if (m.matches()) {
    return m.group(1) + addxml + m.group(3);
  } else return origxml;
}

Henry
[ December 20, 2006: Message edited by: Henry Wong ]

[Mohit Sinha]

Hi Henry,

Thats neat.

If you can just ellaborate what this does it would give us a good understanding on the same.


Thanks & Regards,

[Henry Wong]

Originally posted by Mohit Sinha:
If you can just ellaborate what this does it would give us a good understanding on the same.

Thanks & Regards,

It just does a regex match on XML -- and capturing it in two groups. For the XML match, it confirms that it must start with a "<tag>" and end with a "</tag>". And that the "tag" that is used is the same, this is done with another group.

Once the match is established, it will insert the new XML between the two captured groups.

Henry