JAVA Mapping: Convert the InputStream in to OutputStream out

Question

Hi everybody,
I'd like to code my first JAVA Mapping. For this I would just like to convert the InputStream in  to OutputStream out.
This does not work:
out = new FileOutputStream(new File(in));
How has the code look like?
Thanks, regards
Mario

Answer 1

Hi Mario.
Do you want to convert input into output directly without doing any transformation?
The way I've always used is to load the input document first:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(inputStream);
After loading the document you can parse it's content with DOM API.
Finally you create the transformed document and return it through outputstream:
Document resultDoc = builder.newDocument();
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(resultDoc);
StreamResult result = new StreamResult(outputStream);
transformer.transform(source, result);
If  you want to convert the input to output you can use:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(inputStream);
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(outputStream);
transformer.transform(source, result);
At this point, I think you will have the input into the output.
Regards,
Gari.