Hi,
I'm having problems with creating an image from a plain
org.w3c.dom.Document. I was told that I could use
DOMUtilities.deepCloneDocument to convert a w3c-Document to a SVGDocument,
but when I run the transcoding I get a ClassCastException. Apparently when
the ImageTranscoder tries to cast the root element to
org.apache.batik.dom.GenericElement.
I'm using a very simple XML in this example to illustrate my problem,
normally I would run a XSL transformation on a Document containing financial
information to create a JPEG image in a report (that is created with an
other transformation on the same source).
Now I must convert the resulting Document into a String before I give it to
Batik, not a very effective process I would believe...
Below is some sample code that illustrates my problem, as well as the
exception I get. Can anyone see if I'm doing anything wrong?
Thanks,
- Jon
import org.apache.xerces.parsers.*;
import org.apache.batik.transcoder.image.*;
import org.apache.batik.transcoder.*;
import org.apache.batik.dom.util.*;
import org.apache.batik.dom.svg.*;
import org.xml.sax.*;
import org.w3c.dom.*;
import java.io.*;
public class BatikTest {
public static void main (String args[]) throws Exception {
final String XML = "<svg><circle cx=\"100\" cy=\"100\" r=\"50\"
style=\"fill:green\"/></svg>";
DOMParser parser = new DOMParser();
InputSource inputSource = new InputSource(new StringReader(XML));
parser.parse(inputSource);
Document SVG = parser.getDocument();
Document SVGDOM = DOMUtilities.deepCloneDocument(SVG,
SVGDOMImplementation.getDOMImplementation());
TranscoderInput in = new TranscoderInput(SVGDOM);
FileOutputStream f = new FileOutputStream("d:\\svgtest.jpg");
TranscoderOutput out = new TranscoderOutput(f);
Transcoder transcoder = new JPEGTranscoder();
transcoder.addTranscodingHint(ImageTranscoder.KEY_XML_PARSER_CLASSNAME,
"org.apache.xerces.parsers.SAXParser");
transcoder.transcode(in, out);
f.flush();
f.close();
}
}
The above code gives the following exception when I try to execute it (it
fails at the line transcoder.transcode(in, out);) :
java.lang.ClassCastException: org.apache.batik.dom.GenericElement
at
org.apache.batik.dom.svg.SVGOMDocument.getRootElement(SVGOMDocument.java:519
)
at
org.apache.batik.transcoder.image.ImageTranscoder.transcode(ImageTranscoder.
java:142)
at
org.apache.batik.transcoder.XMLAbstractTranscoder.transcode(XMLAbstractTrans
coder.java:126)
at com.accenture.jam.xml.BatikTest.main(BatikTest.java:26)
I'm using JDK1.3 on Windows NT and Batik 1.0
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