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Question on JDOM

 
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Hi,

i just downloaded JDOM and i have to say i find it much easier to learn than the xerces Api.
My Question is : Is there a possebility to search the (whole!)Document for a specified childnode ? . As Result i want a list of all Childs in the document with the given name.
I didnt found such a method - all methods i found
only find child elements nested directly (one level deep).
 
Holger Prause
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Hi

Sorry i accidentially pressed Return and submitted the topic- *gg*

So my conclusion is you have always to be aware of the XML Spezifikation of the Document you have.You must browse the tree until you reach the node with the child you want to have.
Right ?

Thx,
Holger
[This message has been edited by Holger Prause (edited March 29, 2001).]
 
Holger Prause
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Hi

I think i found a reasonalbe solution - ill test how it works on huge Documents
here it comes - ill just show the important methods
<pre>
public Main() {
try {
// Build w/ SAX and Xerces, no validation
SAXBuilder b = new SAXBuilder();
// Create the document
doc = b.build(new File(xmlpath));
Element rootElement = doc.getRootElement();
Vector myChilds = getAllElementsWithName(rootElement,"TextElement");
log("Vector myChilds contains " + myChilds.size()+ " elements");
// Output as XML to screen
//XMLOutputter outputter = new XMLOutputter();
//outputter.output(doc, System.out);
} catch (Exception e)
{
log(e.getMessage());
e.printStackTrace();
}
}
//this method returns a Vector of all Elements with the specified name
private Vector getAllElementsWithName(Element elem,String elemName)
throws Exception{
Vector childVector = new Vector(20,1);
findChilds(childVector,elem,elemName);
return childVector;
}
//this method works recursivly through the DOM - putting all Elements in
//the spezicied Vector
private void findChilds(Vector childContainer,Element elem,String elemName)
throws Exception {
List childs = elem.getChildren();
for(int i = 0;i <childs.size();i++) {
Element tmpelem = (Element)childs.get(i);
log("processing node: "+tmpelem.getName());
if(tmpelem.getName().equals(elemName)) {
childContainer.addElement(tmpelem);
log("Element "+elemName+ "found");
}
else {
findChilds(childContainer,tmpelem, elemName);
}
}
}
</pre>
thats it - i like JDOM
[This message has been edited by Holger Prause (edited March 29, 2001).]
 
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Holger, I�ve heard about werken.xpath, which is said to implement xpath on top of jdom. �werken.xpath takes as input, a XPath expression, and a JDOM tree, and returns a NodeSet (java.util.List) of selected elements� � that�s from their web site: http://code.werken.com/xpath/
 
Holger Prause
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>Holger, I�ve heard about werken.xpath, which is said to >implement xpath on top of jdom. �werken.xpath takes as input, a >XPath expression, and a JDOM tree, and returns a NodeSet
>(java.util.List) of selected elements

Hi,
thx for this tip.
I think i am quite familiar with XSLT+XPath so ill take a look at it.In the Xalan Api, this is also possible.(www.apache.org)

Bye,
Holger
 
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