private InvocationResult invoke()

in src/main/java/org/apache/maven/plugins/linkcheck/SiteInvoker.java [265:346]
76 lines of code
10 McCabe index (conditional complexity)

    private InvocationResult invoke( Invoker invoker, InvocationRequest request, File invokerLog, List<String> goals,
                                     Properties properties, String mavenOpts )
        throws MavenInvocationException
    {
        PrintStream ps;
        OutputStream os = null;
        if ( invokerLog != null )
        {
            if ( getLog().isDebugEnabled() )
            {
                getLog().debug( "Using " + invokerLog.getAbsolutePath() + " to log the invoker" );
            }

            try
            {
                if ( !invokerLog.exists() )
                {
                    invokerLog.getParentFile().mkdirs();
                }
                os = new FileOutputStream( invokerLog );
                ps = new PrintStream( os, true, "UTF-8" );
            }
            catch ( FileNotFoundException e )
            {
                if ( getLog().isErrorEnabled() )
                {
                    getLog().error( "FileNotFoundException: " + e.getMessage()
                        + ". Using System.out to log the invoker." );
                }
                ps = System.out;
            }
            catch ( UnsupportedEncodingException e )
            {
                if ( getLog().isErrorEnabled() )
                {
                    getLog().error( "UnsupportedEncodingException: " + e.getMessage()
                        + ". Using System.out to log the invoker." );
                }
                ps = System.out;
            }
        }
        else
        {
            getLog().debug( "Using System.out to log the invoker." );

            ps = System.out;
        }

        if ( mavenOpts != null )
        {
            request.setMavenOpts( mavenOpts );
        }

        InvocationOutputHandler outputHandler = new PrintStreamHandler( ps, false );
        request.setOutputHandler( outputHandler );
        request.setErrorHandler( outputHandler );

        try
        {
            outputHandler.consumeLine( "Invoking Maven for the goals: " + goals + " with properties=" + properties );
            outputHandler.consumeLine( "" );
            outputHandler.consumeLine( "M2_HOME=" + getMavenHome() );
            outputHandler.consumeLine( "MAVEN_OPTS=" + getMavenOpts() );
            outputHandler.consumeLine( "JAVA_HOME=" + getJavaHome() );
            outputHandler.consumeLine( "JAVA_OPTS=" + getJavaOpts() );
            outputHandler.consumeLine( "" );
        }
        catch ( IOException e )
        {
            throw new MavenInvocationException( e.getMessage(), e.getCause() );
        }

        try
        {
            return invoker.execute( request );
        }
        finally
        {
            IOUtil.close( os );
            ps = null;
        }
    }