Java5 Xpath problem

I am trying to evaluate an XML document using the javax.xml libraries,
but I guess I'm doing something wrong. I need to get all 'layer'
attributes from the document. To do this, I did this:

NodeList layers = (NodeList) path.evaluate("/root//layer",
    <xml inputsource>, XPathConstants.NODESET);

Then, I need to use the elements within that layer. The code I use is:

for(int i = 0;i<layers.getLength();i++){
      Node layer = layers.item(i);
      lname = layer.getNextSibling().getNodeValue().trim();
      lsource = layer.getNextSibling().getNodeValue().trim();
      ldest = layer.getNextSibling().getNodeValue().trim();
}

It finds the layers within the document, but when I store the element
values in the for-loop, it stores empty strings (when I call
getNodeName(), it returns "#text"). Do I need to evaluate the expression
differently, because it seems like the elements within the layers aren't
evaluated.

As an example, a layer node:

         <layer>
             <name>
                 Name
             </name>
             <sourceTable>
                 Source
             </sourceTable>
             <destColumn>
                 gcolName
             </destColumn>
    </layer>

TIA.