private Stream loadConfiguration()

in meecrowave-doc/src/main/java/org/apache/meecrowave/doc/generator/MavenConfiguration.java [49:111]
60 lines of code
13 McCabe index (conditional complexity)

    private Stream<Config> loadConfiguration() {
        try (final InputStream stream = new FileInputStream(new File(
                jarLocation(MavenConfiguration.class).getParentFile().getParentFile().getParentFile(),
                "meecrowave-maven-plugin/target/classes/META-INF/maven/plugin.xml"))) {
            final SAXParserFactory factory = SAXParserFactory.newInstance();
            factory.setNamespaceAware(true);
            factory.setValidating(false);
            final SAXParser parser = factory.newSAXParser();
            final Collection<Config> configs = new ArrayList<>();
            parser.parse(stream, new DefaultHandler() {
                public Config config;
                private boolean inMojo;
                private boolean inConfiguration;
                private StringBuilder builder;
                private String goal;

                @Override
                public void startElement(final String uri, final String localName,
                                         final String qName, final Attributes attributes) throws SAXException {
                    if ("mojo".equals(localName)) {
                        inMojo = true;
                    } else if ("goal".equals(localName)) {
                        builder = new StringBuilder();
                    } else if ("run".equals(goal) && "configuration".equals(localName)) {
                        inConfiguration = true;
                    } else if (inConfiguration) {
                        config = new Config();
                        configs.add(config);
                        config.name = localName;
                        config.defaultValue = attributes.getValue("default-value");
                        builder = new StringBuilder();
                    }
                }

                @Override
                public void characters(final char[] ch, final int start, final int length) throws SAXException {
                    if (builder != null) {
                        builder.append(ch, start, length);
                    }
                }

                @Override
                public void endElement(final String uri, final String localName, final String qName) throws SAXException {
                    if ("mojo".equals(localName)) {
                        inMojo = false;
                        goal = null;
                    } else if ("goal".equals(localName)) {
                        goal = builder.toString();
                        builder = null;
                    } else if ("run".equals(goal) && "configuration".equals(localName)) {
                        inConfiguration = false;
                    } else if (inConfiguration) {
                        config.property = builder.toString();
                        builder = null;
                        config = null;
                    }
                }
            });
            return configs.stream();
        } catch (final Exception e) {
            throw new IllegalStateException(e);
        }
    }