/*

 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.ArrayList;

import java.util.List;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

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.StreamSource;

import javax.xml.transform.stream.StreamResult;

import org.xml.sax.ErrorHandler;

import org.xml.sax.SAXException;

import org.xml.sax.SAXParseException;

import org.w3c.dom.Document;

import org.w3c.dom.DOMException;

public class jvmtiGen

{

    private static final int EXIT_FAILURE_ERROR = 1;

    private static final int EXIT_FAILURE_BADARGUMENTS = 2;

    private static boolean verbose = false;

    /**

     * Write out usage and exit.

     */

    private static void showUsage() {

        System.err.println("usage:");

        System.err.println("  java jvmtiGen " +

                           "[-verbose] " +

                           "-IN <input XML file name> " +

                           "-XSL <XSL file> " +

                           "-OUT <output file name> " +

                           "[-PARAM <name> <expression> ...]");

        System.exit(EXIT_FAILURE_BADARGUMENTS); // There is no returning from showUsage()

    }

    public static void main (String argv []) {

        String inFileName = null;

        String xslFileName = null;

        String outFileName = null;

        final List<String> params = new ArrayList<String>();

        for (int ii = 0; ii < argv.length; ii++) {

            if (argv[ii].equals("-verbose")) {

                verbose = true;

            } else if (argv[ii].equals("-IN")) {

                inFileName = argv[++ii];

            } else if (argv[ii].equals("-XSL")) {

                xslFileName = argv[++ii];

            } else if (argv[ii].equals("-OUT")) {

                outFileName = argv[++ii];

            } else if (argv[ii].equals("-PARAM")) {

                if (ii + 2 < argv.length) {

                    final String name = argv[++ii];

                    params.add(name);

                    final String expression = argv[++ii];

                    params.add(expression);

                } else {

                    showUsage();

                }

            } else {

                showUsage();

            }

        }

        if (inFileName == null || xslFileName == null || outFileName == null) {

            showUsage();

        }

        final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

        factory.setNamespaceAware(true);

        factory.setValidating(true);

        factory.setXIncludeAware(true);

        final File datafile   = new File(inFileName);

        final File stylesheet = new File(xslFileName);

        try (

            final OutputStream os = new BufferedOutputStream(new FileOutputStream(outFileName));

        ) {

            final StreamSource stylesource = new StreamSource(stylesheet);

            // Use a Transformer for output

            final Transformer transformer =

                TransformerFactory.newInstance().newTransformer(stylesource);

            for (int ii = 0; ii < params.size(); ii += 2) {

                transformer.setParameter(params.get(ii), params.get(ii + 1));

            }

            final DocumentBuilder builder = factory.newDocumentBuilder();

            builder.setErrorHandler(new ErrorHandler() {

                    public void fatalError(SAXParseException exn) throws SAXException {

                        throw new SAXException(exn);

                    }

                    public void error(SAXParseException exn) throws SAXException {

                        fatalError(exn);

                    }

                    public void warning(SAXParseException exn) throws SAXException {

                        if (verbose) {

                            System.err.println("jvmtiGen warning: " + exn.getMessage());

                        }

                    }

                });

            final Document document = builder.parse(datafile);

            final DOMSource source = new DOMSource(document);

            final StreamResult result = new StreamResult(os);

            transformer.transform(source, result);

        } catch (IOException

            | ParserConfigurationException

            | SAXException

            | TransformerException exn) {

            System.err.print("jvmtiGen error: " + exn.getMessage());

            exn.printStackTrace(System.err);

            System.exit(EXIT_FAILURE_ERROR);

        }

    } // main

}