import uk.me.nxg.lx.reader.LxReader;
import uk.me.nxg.lx.LxException;

import java.io.File;
import java.io.FileReader;

import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.Source;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.stream.StreamResult;


/**
 * Simple XSLT transformer using an Lx stylesheet.  Usage is simple:
 * <pre>
 *    java transformer input.xml stylesheet.lx
 * </pre>
 * Output is to stdout.
 */
public class transformer {

    public static void main(String args[]) {

        if (args.length != 2) {
            Usage();
        }

        String inputFile = args[0];
        String stylesheetFile = args[1];

        try {
            org.xml.sax.XMLReader xr = new uk.me.nxg.lx.reader.LxReader();
            xr.setFeature("http://xml.org/sax/features/namespace-prefixes",
                          false);
            xr.setFeature("http://xml.org/sax/features/namespaces",
                          true);

            Source tranSrc
                    = new SAXSource(xr,
                                    new org.xml.sax.InputSource
                                       (new FileReader(stylesheetFile)));
            Transformer t = TransformerFactory.newInstance()
                    .newTransformer(tranSrc);

            t.transform(new StreamSource(new File(inputFile)),
                        new StreamResult(System.out));
            
        } catch (uk.me.nxg.lx.LxException e) {
            System.err.println("Can't create LxReader: " + e);
        } catch (org.xml.sax.SAXException e) {
            System.err.println("Can't set feature: " + e);
        } catch (java.io.FileNotFoundException e) {
            System.err.println("Can't find file " + e);
        } catch (java.io.IOException e) {
            System.err.println("IO Exception: " + e);
	} catch (javax.xml.transform.TransformerException e) {
	    System.err.println("Exception: " + e);
	}

	System.exit(0);
    }

    private static void Usage() {
        System.err.println("Usage: java transformer input.xml transform.lx");
        System.exit(1);
    }
}