protected File getContextFile()

in tomcat7-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat7/run/RunMojo.java [175:257]
69 lines of code
7 McCabe index (conditional complexity)

    protected File getContextFile()
        throws MojoExecutionException
    {
        File temporaryContextFile = null;

        //----------------------------------------------------------------------------
        // context attributes backgroundProcessorDelay reloadable cannot be modified at runtime.
        // It looks only values from the file are used
        // so here we create a temporary file with values modified
        //----------------------------------------------------------------------------
        FileReader fr = null;
        FileWriter fw = null;
        StringWriter sw = new StringWriter();
        try
        {
            temporaryContextFile = File.createTempFile( "tomcat-maven-plugin", "temp-ctx-file" );
            temporaryContextFile.deleteOnExit();

            // format to modify/create <Context backgroundProcessorDelay="5" reloadable="false">
            if ( contextFile != null && contextFile.exists() )
            {
                MavenFileFilterRequest mavenFileFilterRequest = new MavenFileFilterRequest();
                mavenFileFilterRequest.setFrom( contextFile );
                mavenFileFilterRequest.setTo( temporaryContextFile );
                mavenFileFilterRequest.setMavenProject( project );
                mavenFileFilterRequest.setMavenSession( session );
                mavenFileFilterRequest.setFiltering( true );

                mavenFileFilter.copyFile( mavenFileFilterRequest );

                fr = new FileReader( temporaryContextFile );
                Xpp3Dom xpp3Dom = Xpp3DomBuilder.build( fr );
                xpp3Dom.setAttribute( "backgroundProcessorDelay", Integer.toString( backgroundProcessorDelay ) );
                xpp3Dom.setAttribute( "reloadable", Boolean.toString( isContextReloadable() ) );
                fw = new FileWriter( temporaryContextFile );
                Xpp3DomWriter.write( fw, xpp3Dom );
                Xpp3DomWriter.write( sw, xpp3Dom );
                getLog().debug( " generated context file " + sw.toString() );
            }
            else
            {
                if ( contextReloadable )
                {
                    // don't care about using a complicated xml api to create one xml line :-)
                    StringBuilder sb = new StringBuilder( "<Context " ).append( "backgroundProcessorDelay=\"" ).append(
                        Integer.toString( backgroundProcessorDelay ) ).append( "\"" ).append(
                        " reloadable=\"" + Boolean.toString( isContextReloadable() ) + "\"/>" );

                    getLog().debug( " generated context file " + sb.toString() );
                    fw = new FileWriter( temporaryContextFile );
                    fw.write( sb.toString() );
                }
                else
                {
                    // no user context file and contextReloadable false so no need about creating a hack one
                    return null;
                }
            }
        }
        catch ( IOException e )
        {
            getLog().error( "error creating fake context.xml : " + e.getMessage(), e );
            throw new MojoExecutionException( "error creating fake context.xml : " + e.getMessage(), e );
        }
        catch ( XmlPullParserException e )
        {
            getLog().error( "error creating fake context.xml : " + e.getMessage(), e );
            throw new MojoExecutionException( "error creating fake context.xml : " + e.getMessage(), e );
        }
        catch ( MavenFilteringException e )
        {
            getLog().error( "error filtering context.xml : " + e.getMessage(), e );
            throw new MojoExecutionException( "error filtering context.xml : " + e.getMessage(), e );
        }
        finally
        {
            IOUtil.close( fw );
            IOUtil.close( fr );
            IOUtil.close( sw );
        }

        return temporaryContextFile;
    }