How to avoid System.out getting closed from Callback

Question

I want to output the generated schema to the stdout. So I set the System.out as the outputStream of SchemaOutputResolver. StreamResult result = new StreamResult(System.out); But after the statement: jc.generateSchema(outputResolver)

System.out.println() doesn't work anymore. By debugging the code I got that System.out was closed after jc.generateSchema Method.

  JAXBContext jc = JAXBContext.newInstance(SomeObject.class);
  SchemaOutputResolver outputResolver = new SchemaOutputResolver() {

    @Override
    public Result createOutput(String namespaceUri, String suggestedFileName)
        throws IOException {

      StreamResult result = new StreamResult(System.out);

      result.setSystemId(namespaceUri);


      // return result
      return result;
    }
  };
  jc.generateSchema(outputResolver);
  System.out.println("this String can't be output");

My Question is, how to output the generated schema to stdout without closing the System.out by using jc.generateSchema?

Answer 1

Create a PrintStream class (say, UncloseablePrintStream) that just wraps another PrintStream and ignores the close call, then do:

StreamResult result = new StreamResult(new UncloseablePrintStream(System.out)));

Completely untested, but it may be this simple:

import java.io.PrintStream;

public class UncloseablePrintStream extends PrintStream {
    public UncloseablePrintStream(PrintStream ps) {
        super(ps);
    }

    @Override
    public void close() {
        // Do nothing
    }
}