Jason,
Thanks for your response!
I'm probably doing something wrong then.
The source is almost self-explaining.
I use a properties-file to supply the xpath-expressions. The keys of it are
the expressions,
the values are not used.
Greetings, Edwin
----------------------------------------------------------------------------
------------------------------------------------------
import org.dom4j.io.*;
import org.dom4j.*;
import java.util.*;
import java.io.*;
public class DomFilter
{
public Document in_doc;
public Document out_doc;
public Element in_root;
public Element out_root;
public String output_file;
public Properties filter_data;
private DocumentFactory factory = DocumentFactory.getInstance();
public DomFilter( String input_file, String filter_file, String
output_file )
{
try
{
SAXReader saxReader = new SAXReader();
in_doc = saxReader.read( new FileInputStream(
input_file ) );
String root_name =
in_doc.getRootElement().getQualifiedName();
out_doc =
DocumentFactory.getInstance().createDocument();
out_doc.addElement( root_name );
out_root = out_doc.getRootElement();
filter_data = new Properties();
filter_data.load(new FileInputStream(filter_file));
Enumeration filter_keys =
filter_data.propertyNames();
while (filter_keys.hasMoreElements())
{
String filter_key =
(String)filter_keys.nextElement();
filter( filter_key );
}
FileOutputStream out = new FileOutputStream(
output_file );
OutputFormat outformat =
OutputFormat.createPrettyPrint();
XMLWriter writer = new XMLWriter(out, outformat);
writer.write(out_doc);
writer.flush();
}
catch (Exception e)
{
e.printStackTrace();
}
this.output_file = output_file;
}
public void filter( String filter_key )
{
List nodes = in_doc.selectNodes( filter_key );
for (int i=0; i<nodes.size(); i++)
{
Node node = (Node)nodes.get(i);
if (node.getNodeType()==Node.ELEMENT_NODE)
{
Element el = (Element)node;
Element el_copy = el.createCopy();
add_to_result( el_copy, el.getPath() );
}
}
}
public void add_to_result( Element el, String path )
{
path = path.substring(0,path.lastIndexOf("/"));
StringTokenizer st = new StringTokenizer( path,"/" );
Element parent_el=out_root;
String expr = "/"+st.nextToken();
while (st.hasMoreTokens())
{
String el_name = st.nextToken();
expr += "/" + el_name;
List nodes = parent_el.selectNodes( expr );
if (nodes.size()!=0)
{
parent_el = (Element)nodes.get(0);
}
else
{
parent_el = parent_el.addElement( el_name );
}
}
parent_el.add( el );
}
public static void logMessage(String msg)
{
System.out.println( msg );
}
public static void usage()
{
System.out.println("DomFilter <input_file> <filter_file>
<output_file>");
}
public static void main( String[] args )
{
if (args.length<3)
{
usage();
return;
}
new DomFilter( args[0], args[1], args[2] );
}
}
----------------------------------------------------------------------------
----------------------------------------------------
> ----------
> From: Jason Stortz[SMTP:[EMAIL PROTECTED]]
> Sent: donderdag 1 augustus 2002 12:56
> To: Bulter, Edwin; [EMAIL PROTECTED]
> Subject: RE: [dom4j-user] XPATH expression problem: Am I trying to
> use an unimplemented feature?
>
> Edwin,
>
> I do this kind of stuff all the time and it works.
> As a matter of fact I exclusively use subelement selections
> instead of attributes because I read somewhere, who knows
> where, that it is faster (can anyone confirm this?).
>
> Soo...can you post your java method, maybe I can try
> running it over here?
>
> It should work!
>
> -jason
>
> -----Original Message-----
> From: Bulter, Edwin [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 01, 2002 4:19 AM
> To: '[EMAIL PROTECTED]'
> Subject: [dom4j-user] XPATH expression problem: Am I trying to use an
> unimplemented feature?
>
>
> I am using the xpath-syntax for filtering an XML-document and pass the
> result through.
> To filter the nodes I use the method "public List selectNodes(String
> xpathExpression)" on my document.
>
> Example :
> <AAA>
> <BBB A="1">
> <C>a</C>
> </BBB>
> <BBB A="2">
> <C>b</C>
> </BBB>
> <BBB A="3">
> <C>c</C>
> </BBB>
> </AAA>
>
> Selecting an element on attribute-values works fine, i.e.:
> expression:
> /AAA/BBB[@A='2']
> result:
> <BBB A="2">
> <C>b</C>
> </BBB>
>
> Selecting an element on the element-text of an inner-element is a problem,
> i.e.:
> expression:
> /AAA/BBB[C='b']
> result:
> <BBB A="1">
> <C>a</C>
> </BBB>
> <BBB A="2">
> <C>b</C>
> </BBB>
> <BBB A="3">
> <C>c</C>
> </BBB>
>
> In this last case I would expect only the second BBB-element as the
> result.
>
> I used xpath-expressions like this before in XSL-documents which worked
> fine.
> Why doesn't it with DOM4J?
>
> Regards,
>
> Edwin
>
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