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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2011, 2013, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 */

package com.sun.javafx.css.parser;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;

import com.sun.javafx.css.StringStore;
import com.sun.javafx.css.Stylesheet;

/** Css2Bin  []
 * java -classpath /javafx-ui-common.jar com.sun.javafx.css.parser.Css2Bin input.css output.bss
 *  If no output file is given, then the input file name is used with an extension of 'bss'x
 */
public class Css2Bin {
    public static void main(String args[]) throws Exception {
        
        if ( args.length < 1 ) throw new IllegalArgumentException("expected file name as argument");

        try {
            String ifname = args[0];
            String ofname = (args.length > 1) ?
                args[1] : ifname.substring(0, ifname.lastIndexOf('.')+1).concat("bss");

            convertToBinary(ifname, ofname);

        } catch (Exception e) {
            System.err.println(e.toString());
            e.printStackTrace(System.err);
            System.exit(-1);
        } 
    }

    public static void convertToBinary(String ifname, String ofname) throws IOException {
        final URL urlIn = new java.net.URL("file", null, ifname);

        CSSParser.EXIT_ON_ERROR = true;
        Stylesheet stylesheet = CSSParser.getInstance().parse(urlIn);

        // first write all the css binary data into the buffer and collect strings on way
        StringStore stringStore = new StringStore();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(baos);
        stylesheet.writeBinary(dos, stringStore);
        dos.flush();
        dos.close();

        File outFile = new File(ofname);
        FileOutputStream fos = new FileOutputStream(outFile);
        DataOutputStream os = new DataOutputStream(fos);
        // write file version
        os.writeShort(2);
        // write strings
        stringStore.writeBinary(os);
        // write binary data
        os.write(baos.toByteArray());
        os.flush();
        os.close();
    }

//
//    public void writeString(DataOutputStream os, String string) throws IOException {
//        os.writeInt(1); // version
//        int len = (string != null) ? string.length() : 0;
//        os.writeInt(len);
//        if (len > 0) {
//            os.write(string.getBytes(), 0, len);
//        }
//    }
//
//    public String readString(DataInputStream is) throws IOException {
//        int version = is.readInt();
//        int len = is.readInt();
//        if (len > 0) {
//            byte bytes[] = new byte[len];
//            is.readFully(bytes, 0, len);
//            return new String(bytes);
//        } else {
//            return null;
//        }
//    }
}