}

    /**
     * @return the project classloader
     * @throws DependencyResolutionRequiredException failed to resolve project dependencies
     * @throws MalformedURLException configuration issue ?
     */
    protected ClassLoader getProjectClassLoader()
        throws DependencyResolutionRequiredException, MalformedURLException
    {
        getLog().debug( "AbstractMojo#getProjectClassLoader()" );

        List<?> compile = getProject().getCompileClasspathElements();
        URL[] urls = new URL[compile.size()];
        int i = 0;
        for ( Object object : compile )
        {
            if ( object instanceof Artifact )
            {
                urls[i] = ( (Artifact) object ).getFile().toURI().toURL();
            }
            else
            {
                urls[i] = new File( (String) object ).toURI().toURL();
            }
            i++;
        }
        return new URLClassLoader( urls, ClassLoader.getSystemClassLoader() );
    }

    /**
     * @param path file to add to the project compile directories
     */
    protected void addCompileSourceRoot( File path )
    {
        getProject().addCompileSourceRoot( path.getAbsolutePath() );
    }

    /**
     * Add project classpath element to a classpath URL set
     *
     * @param originalUrls the initial URL set
     * @return full classpath URL set
     * @throws MojoExecutionException some error occured
     */
    protected URL[] addProjectClasspathElements( URL[] originalUrls )
        throws MojoExecutionException
    {
        Collection<?> sources = getProject().getCompileSourceRoots();
        Collection<?> resources = getProject().getResources();
        Collection<?> dependencies = getProject().getArtifacts();
        URL[] urls = new URL[originalUrls.length + sources.size() + resources.size() + dependencies.size() + 2];

        int i = originalUrls.length;
        getLog().debug( "add compile source roots to GWTCompiler classpath " + sources.size() );
        i = addClasspathElements( sources, urls, i );
        getLog().debug( "add resources to GWTCompiler classpath " + resources.size() );
        i = addClasspathElements( resources, urls, i );
        getLog().debug( "add project dependencies to GWTCompiler  classpath " + dependencies.size() );
        i = addClasspathElements( dependencies, urls, i );
        try
        {
            urls[i++] = getGenerateDirectory().toURL();

    private String getClassPathElementFor( Class < ? > clazz )
    {
        String classFile = clazz.getName().replace( '.', '/' ) + ".class";
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        if ( cl == null )
        {
            cl = getClass().getClassLoader();
        }
        URL url = cl.getResource( classFile );
        String path = url.toString();
        if ( path.startsWith( "jar:" ) )
        {
            path = path.substring( 4, path.indexOf( "!" ) );
        }
        else
        {
            path = path.substring( 0, path.length() - classFile.length() );
        }
        if ( path.startsWith( "file:" ) )
        {
            path = path.substring( 5 );
        }
        return path;

        return new File( path );
    }

    /**
     * @return the project classloader
     * @throws DependencyResolutionRequiredException failed to resolve project dependencies
     * @throws MalformedURLException configuration issue ?
     */
    protected ClassLoader getProjectClassLoader()
        throws DependencyResolutionRequiredException, MalformedURLException
    {
        getLog().debug( "AbstractMojo#getProjectClassLoader()" );

        List<?> compile = getProject().getCompileClasspathElements();
        URL[] urls = new URL[compile.size()];
        int i = 0;
        for ( Object object : compile )
        {
            if ( object instanceof Artifact )
            {
                urls[i] = ( (Artifact) object ).getFile().toURI().toURL();
            }
            else
            {
                urls[i] = new File( (String) object ).toURI().toURL();
            }
            i++;
        }
        return new URLClassLoader( urls, ClassLoader.getSystemClassLoader() );
    }

    }

    /**
     * @return the project classloader
     * @throws DependencyResolutionRequiredException failed to resolve project dependencies
     * @throws MalformedURLException configuration issue ?
     */
    protected ClassLoader getProjectClassLoader()
        throws DependencyResolutionRequiredException, MalformedURLException
    {
        getLog().debug( "AbstractMojo#getProjectClassLoader()" );

        List<?> compile = getProject().getCompileClasspathElements();
        URL[] urls = new URL[compile.size()];
        int i = 0;
        for ( Object object : compile )
        {
            if ( object instanceof Artifact )
            {
                urls[i] = ( (Artifact) object ).getFile().toURI().toURL();
            }
            else
            {
                urls[i] = new File( (String) object ).toURI().toURL();
            }
            i++;
        }
        return new URLClassLoader( urls, ClassLoader.getSystemClassLoader() );
    }