Re: [dom4j-user] dom4j blues

[Evan Kirkconnell]

|http://www.w3.org/TR/xpath
extract:
//para| selects all the |para| descendants of the document root and thus 
selects all |para| elements in the same document as the context node

take off the //

--Evan

Piz Pot wrote:
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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------------------------------------------------------------------------

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