/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
package oooapplet;

import java.lang.reflect.Method;
import java.lang.reflect.Array;
import java.net.*;
import java.io.*;
import java.awt.*;
import java.applet.Applet;
import java.awt.Graphics;
import java.util.*;

public class OOoViewer extends Applet {

    private static CustomURLClassLoader m_loader;

    Object  m_objBean;

    @Override
    public void init() {
        try {
            if (m_loader == null) {
                String s = getParameter("office");
                System.out.println("sun.awt.noxembed: " + System.getProperty("sun.awt.noxembed"));
                System.setProperty("sun.awt.xembedserver", "true");

                File f = new File(s);
                URL url = f.toURI().toURL();
                String officeURL = url.toString();
                URL[] arURL = new URL[] {
                    new URL(officeURL + "/program/classes/officebean.jar"),
                    new URL(officeURL + "/program/classes/libreoffice.jar"),
                    new URL(officeURL + "/program/classes/java_uno.jar")
                };
                m_loader = new CustomURLClassLoader(arURL);
                File fileProg = new File(s + "/program");
                m_loader.addResourcePath(fileProg.toURI().toURL());
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void start() {
        try {
        Class<?> beanClass = m_loader.loadClass("com.sun.star.comp.beans.OOoBean");
        m_objBean = beanClass.newInstance();
        setLayout(new BorderLayout());
        add((java.awt.Container)m_objBean, BorderLayout.CENTER);
        setVisible(true);
        //this does not work here. Why?
//        Class arPropValClass = m_loader.loadClass("[Lcom.sun.star.beans.PropertyValue;");
        Object arProp = Array.newInstance(
            m_loader.loadClass("com.sun.star.beans.PropertyValue"), 1);

        Method methLoad = beanClass.getMethod(
            "loadFromURL", new Class[] {
                String.class, arProp.getClass() });

        methLoad.invoke(m_objBean, new Object[] {"private:factory/swriter", null});
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (ClassCastException e) {
            e.printStackTrace();
        } catch (java.lang.reflect.InvocationTargetException e) {
            e.printStackTrace();
        } catch (java.lang.NoSuchMethodException e) {
            e.printStackTrace();        }



        validate();
    }

    @Override
    public void stop() {
        try {
            Method methStop = m_objBean.getClass().getMethod(
                "stopOOoConnection", new Class[0]);
            methStop.invoke(m_objBean, (Object[]) null);
        } catch (java.lang.NoSuchMethodException e) {
            e.printStackTrace();
        } catch (java.lang.IllegalAccessException e) {
            e.printStackTrace();
        }
         catch (java.lang.reflect.InvocationTargetException e) {
            e.printStackTrace();
         }

    }

    @Override
    public void destroy() {
    }

    @Override
    public void paint(Graphics g) {
    }
}


final class CustomURLClassLoader extends URLClassLoader {

    private ArrayList<URL> resourcePaths;

    public CustomURLClassLoader( URL[] urls ) {
        super( urls );
    }

    @Override
    protected Class<?> findClass( String name ) throws ClassNotFoundException {
        // This is only called via this.loadClass -> super.loadClass ->
        // this.findClass, after this.loadClass has already called
        // super.findClass, so no need to call super.findClass again:
        throw new ClassNotFoundException( name );
    }



    @Override
    protected synchronized Class<?> loadClass( String name, boolean resolve )
        throws ClassNotFoundException
    {
        Class c = findLoadedClass( name );
        if ( c == null ) {
            try {
                c = super.findClass( name );
            } catch ( ClassNotFoundException e ) {
                return super.loadClass( name, resolve );
            } catch ( SecurityException e ) {
                // A SecurityException "Prohibited package name: java.lang"
                // may occur when the user added the JVM's rt.jar to the
                // java.class.path:
                return super.loadClass( name, resolve );
            }
        }
        if ( resolve ) {
            resolveClass( c );
        }
        return c;
    }

    public void addResourcePath(URL rurl) {
        if (resourcePaths == null) resourcePaths = new ArrayList<URL>();
        resourcePaths.add(rurl);
    }

    @Override
    public URL getResource(String name) {
        if (resourcePaths == null) return null;

        URL result = super.getResource(name);
        if (result != null) {
            return result;
        }

        for (URL u : resourcePaths) {
            if (u.getProtocol().startsWith("file")){
                try {
                    File f1 = new File(u.getPath());
                    File f2 = new File(f1, name);
                    if (f2.exists()) {
                        return new URL(f2.toURI().toASCIIString());
                    }
                } catch (MalformedURLException e1) {
                    System.err.println("malformed url: "+e1.getMessage());
                    continue;
                }
            }
        }
        return null;
    }

}
