[dom4j-user] dom4j blues

[Piz Pot]

Hello all,

  I'm having a little bit of trouble understanding something basic and 
I have boiled it down to the code below. Also attached is a zip file 
containing all 3 files. ( The dom4j SMTP server does not seem to like 
zip attachments, so I have changed the extension to .zip.txt. Please 
change it back to .zip be able to deflate it )

  Why would an XPath search from a first level element (id=1) return 
all second level elements(id=2,4,6)  and not just the children(id=2,4) 
of the node I'm searching from ?

  I'm pretty sure I've missed something, but I don't know what. Could 
someone take a couple of minutes and explain this to me?

thanks in advance,
PP


-------------new.xml-------
<?xml version="2.0" encoding="UTF-8"?>
<root>
<firstlevel id="1">
  <secondlevel id="2">
      <thirdlevel id="3"/>
  </secondlevel>
  <secondlevel id="4"/>
</firstlevel>
<firstlevel id="5">
  <secondlevel id="6"/>
</firstlevel>
</root>

---------Main.java---------
import java.io.*;
import java.util.*;
import org.dom4j.*;
import org.dom4j.io.SAXReader;

public class Main {
    public Main() {
  }
    public static void main(String[] args)
  throws DocumentException{
            Document mapdoc;
      SAXReader reader = new SAXReader();
      File fMapFile = new File("src/new.xml");
            mapdoc = reader.read(fMapFile); // throws 
org.dom4j.DocumentException
      List OuterList = mapdoc.selectNodes("//firstlevel");
      System.out.println("Document:\n" + mapdoc.asXML() + "\n----------");
            if(OuterList != null && !OuterList.isEmpty()){
                    for ( int i=0; i < OuterList.size(); i++ ) {
                            Node firstlevel = (Node) OuterList.get(i);
              System.out.println("FirstLevel:i=" + i + ":\n" + 
firstlevel.asXML() + "\n----------");
                            List InnerList = 
firstlevel.selectNodes("//secondlevel");
              for ( int j=0; j < InnerList.size(); j++){
                  Element secondlevel = (Element) InnerList.get(j);
                  System.out.println("SecondLevel:j=" + j + ":\n" + 
secondlevel.asXML() + "\n----------");
                  
System.out.println(secondlevel.attribute("id").getValue());
              }
          }
                }
        }
}

------------out.txt----------
Document:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<firstlevel id="1">
  <secondlevel id="2">
      <thirdlevel id="3"/>
  </secondlevel>
  <secondlevel id="4"/>
</firstlevel>
<firstlevel id="5">
  <secondlevel id="6"/>
</firstlevel>
</root>
----------
FirstLevel:i=0:
<firstlevel id="1">
  <secondlevel id="2">
      <thirdlevel id="3"/>
  </secondlevel>
  <secondlevel id="4"/>
</firstlevel>
----------
SecondLevel:j=0:
<secondlevel id="2">
      <thirdlevel id="3"/>
  </secondlevel>
----------
2
SecondLevel:j=1:
<secondlevel id="4"/>
----------
4
SecondLevel:j=2:
<secondlevel id="6"/>
----------
6
FirstLevel:i=1:
<firstlevel id="5">
  <secondlevel id="6"/>
</firstlevel>
----------
SecondLevel:j=0:
<secondlevel id="2">
      <thirdlevel id="3"/>
  </secondlevel>
----------
2
SecondLevel:j=1:
<secondlevel id="4"/>
----------
4
SecondLevel:j=2:
<secondlevel id="6"/>
----------
6
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