Handling of special characters to avoid UTFDataFormatException

Hi,

On my weblogic server 8.1, I have a small piece of code which reads xml data and generates reports in PDF format.

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.InputSource;

//HERE the xslTransform is passed as a StringBuffer of size 512
public String transform (String xmlData, String xslTransform) throws Exception
{
      String outputXML = null;
      
      //1. first convert the input xml to a source
      Source dataSource = createSource(xmlData);      
      
      //2. convert this xsl too to a Source
      Source xslSource  = createSource(xslTransform);
            
      //3. convert the xsl to a Transformer
      TransformerFactory factory = TransformerFactory.newInstance();
      Transformer transformer = factory.newTransformer(xslSource);
      
      //4. create a output result for the output of the transform
      StreamResult result = createResult();
      
      //5. transform
      try
      {
            transformer.transform(dataSource,result);
      }
      catch(Exception e)
      {
            e.printStackTrace(); // THE ERROR PRINTED HERE is java.lang.OutOfMemoryError
      }
      
      //6. get the String the stream result
      //the following works because toString is overridden for ByateArrayOutputStream
      
      outputXML = result.getOutputStream().toString();
      
      //7. return the string result
      return outputXML;

}

private Source createSource(String xml)
{
      //1. create a byte array
      byte[] array = xml.getBytes();
      
      //2. create a inputstrem for this array
      ByteArrayInputStream xmlStream = new  ByteArrayInputStream(array);
            
      //3. now create a SAXSource from this stream
      Source xmlSource = new SAXSource(new InputSource(xmlStream));            

      return xmlSource;
}
      
private StreamResult createResult()
{
      ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
      return new StreamResult(baos);
}

But if the xml size is too big, I get java.lang.OutOfMemoryError.

Can you please give me a solution for this?

Also, even if my xml is small and it contains some special characters like “Threshold is ú3,000”

It gives me the following exception:

javax.xml.transform.TransformerException: java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence.

How to handle these special charaters?

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