package liquibase.util.xml;
   
   import org.w3c.dom.Document;
   
   import javax.xml.transform.OutputKeys;
   import javax.xml.transform.Transformer;
   import javax.xml.transform.TransformerException;
   import javax.xml.transform.TransformerFactory;
   import javax.xml.transform.dom.DOMSource;
  import javax.xml.transform.stream.StreamResult;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  
  public class DefaultXmlWriter implements XmlWriter {
  
      public void write(Document doc, OutputStream outputStream) throws IOException {
          try {
              TransformerFactory factory = TransformerFactory.newInstance();
              try {
                  factory.setAttribute("indent-number", 4);
              } catch (Exception e) {
                  ; // guess we can't set it, that's ok
              }
  
              Transformer transformer = factory.newTransformer();
              transformer.setOutputProperty(OutputKeys.METHOD, "xml");
              transformer.setOutputProperty(OutputKeys.INDENT, "yes");
              transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
  
              // need to nest outputStreamWriter to get around JDK 5 bug. See
              // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6296446
              transformer.transform(new DOMSource(doc), new StreamResult(new OutputStreamWriter(outputStream, "utf-8")));
          } catch (TransformerException e) {
              throw new IOException(e.getMessage());
          }
      }
  }