Re: [dom4j-user] JTidy-Dom4j-NullPointerException
That works ! and with the namespace hint I configured Jtidy not to create a valid XML [setXmlOut(true)] instead of XHTML [setXHTML(true)]. Then JTidy doesn't create namespaces and /html/body/table works fine, also. Thank you, Dave ! Marco You have a default namespace defined in the root. .append(html xmlns=\http://www.w3.org/1999/xhtml\;) You may want to use the /*[local-name()='html']/*[local-name()='body'] to avoid the namespace all together. Give that a try. --- This SF.net email is sponsored by: eBay Get office equipment for less on eBay! http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5 ___ dom4j-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dom4j-user
[dom4j-user] JTidy-Dom4j-NullPointerException
Hi,
I want to use XPath Expressions on a HTML page. I use
JTidy to convert a page into XHTML. This XHTML can be
easily transformed into a dom4j Document.
My current problem is that I get a NullPointerException
if I try to access any Node in the page using a XPath
Expression. I don't understand why...
Thanks in advance
Marco
%---
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.dom4j.Document;
import org.dom4j.Node;
import org.dom4j.io.DOMReader;
import org.w3c.tidy.Tidy;
public class TestTidyDom4j
{
public static void main(String[] args)
{
String page=
new StringBuffer()
.append(html)
.append(head)
.append(title)
.append(Test)
.append(/title)
.append(/head)
.append(body)
.append(h1This is a test/h1)
.append(/body)
.append(/html)
.toString();
// make HTML to XHTML
Tidy tidy= new Tidy();
tidy.setXHTML(true);
InputStream in= new ByteArrayInputStream(page.getBytes());
org.w3c.dom.Document xhtml= tidy.parseDOM(in, null);
// translate DOM for dom4j
DOMReader xmlReader= new DOMReader();
Document document= xmlReader.read(xhtml);
Node table= document.selectSingleNode(/html/body);
System.err.println(table : + table.asXML());
// ^ here is a
// NullPointerException is thrown
}
}
-%
---
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Re: [dom4j-user] JTidy-Dom4j-NullPointerException
Marco, After looking at the code, I am not sure you realize that document.selectSingleNode will return null if the expression is not found. This probably why it was a null pointer exception. Try checking if (table!=null) before processing it. Also take a look at XPE at http://www.purpletech.com/xpe and use its GUI along with a sample document to help you work out your XPath expressions. Later, Dave -- ++ | David Lucasmailto:[EMAIL PROTECTED] | | Lucas Software Engineering, Inc. (740) 964-6248 Voice| | Unix,Java,C++,CORBA,XML,EJB(614) 668-4020 Mobile | | Middleware,Frameworks (888) 866-4728 Fax/Msg | ++ | GPS Location: 40.0150 deg Lat, -82.6378 deg Long | | IMHC: Jesus Christ is the way, the truth, and the life. | | IMHC: I know where I am; I know where I'm going. | ++ Notes: PGP Key Block=http://www.lse.com/~ddlucas/pgpblock.txt IMHO=in my humble opinion IMHC=in my humble conviction All trademarks above are those of their respective owners. --- This SF.net email is sponsored by: eBay Get office equipment for less on eBay! http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5 ___ dom4j-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dom4j-user
Re: [dom4j-user] JTidy-Dom4j-NullPointerException
Did you test with the complete file or just a snippet? You have a default namespace defined in the root. .append(html xmlns=\http://www.w3.org/1999/xhtml\;) You may want to use the /*[local-name()='html']/*[local-name()='body'] to avoid the namespace all together. Give that a try. Later, Dave -- ++ | David Lucasmailto:[EMAIL PROTECTED] | | Lucas Software Engineering, Inc. (740) 964-6248 Voice| | Unix,Java,C++,CORBA,XML,EJB(614) 668-4020 Mobile | | Middleware,Frameworks (888) 866-4728 Fax/Msg | ++ | GPS Location: 40.0150 deg Lat, -82.6378 deg Long | | IMHC: Jesus Christ is the way, the truth, and the life. | | IMHC: I know where I am; I know where I'm going. | ++ Notes: PGP Key Block=http://www.lse.com/~ddlucas/pgpblock.txt IMHO=in my humble opinion IMHC=in my humble conviction All trademarks above are those of their respective owners. --- This SF.net email is sponsored by: eBay Get office equipment for less on eBay! http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5 ___ dom4j-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dom4j-user
