private Metadata parsePropertyPlaceholder()

in blueprint/blueprint-noosgi/src/main/java/org/apache/aries/blueprint/ext/impl/ExtNamespaceHandler.java [406:471]
63 lines of code
20 McCabe index (conditional complexity)

    private Metadata parsePropertyPlaceholder(ParserContext context, Element element) {
        MutableBeanMetadata metadata = context.createMetadata(MutableBeanMetadata.class);
        metadata.setProcessor(true);
        metadata.setId(getId(context, element));
        metadata.setScope(BeanMetadata.SCOPE_SINGLETON);
        metadata.setRuntimeClass(PropertyPlaceholder.class);
        metadata.setInitMethod("init");
        String prefix = element.hasAttribute(PLACEHOLDER_PREFIX_ATTRIBUTE)
                                    ? element.getAttribute(PLACEHOLDER_PREFIX_ATTRIBUTE)
                                    : "${";
        metadata.addProperty("placeholderPrefix", createValue(context, prefix));
        String suffix = element.hasAttribute(PLACEHOLDER_SUFFIX_ATTRIBUTE)
                                    ? element.getAttribute(PLACEHOLDER_SUFFIX_ATTRIBUTE)
                                    : "}";
        metadata.addProperty("placeholderSuffix", createValue(context, suffix));
        metadata.addProperty("blueprintContainer", createRef(context, "blueprintContainer"));
        String nullValue = element.hasAttribute(PLACEHOLDER_NULL_VALUE_ATTRIBUTE)
                ? element.getAttribute(PLACEHOLDER_NULL_VALUE_ATTRIBUTE)
                : null;
        if (nullValue != null) {
            metadata.addProperty("nullValue", createValue(context, nullValue));
        }
        String defaultsRef = element.hasAttribute(DEFAULTS_REF_ATTRIBUTE) ? element.getAttribute(DEFAULTS_REF_ATTRIBUTE) : null;
        if (defaultsRef != null) {
            metadata.addProperty("defaultProperties", createRef(context, defaultsRef));
        }
        String ignoreMissingLocations = element.hasAttribute(IGNORE_MISSING_LOCATIONS_ATTRIBUTE) ? element.getAttribute(IGNORE_MISSING_LOCATIONS_ATTRIBUTE) : null;
        if (ignoreMissingLocations != null) {
            metadata.addProperty("ignoreMissingLocations", createValue(context, ignoreMissingLocations));
        }
        String systemProperties = element.hasAttribute(SYSTEM_PROPERTIES_ATTRIBUTE) ? element.getAttribute(SYSTEM_PROPERTIES_ATTRIBUTE) : null;
        if (systemProperties != null) {
            metadata.addProperty("systemProperties", createValue(context, systemProperties));
        }
        String evaluator = element.hasAttribute(EVALUATOR_ATTRIBUTE) ? element.getAttribute(EVALUATOR_ATTRIBUTE) : null;
        if (evaluator != null) {
            throw new IllegalStateException("Evaluators are not supported outside OSGi");
        }
        // Parse elements
        List<String> locations = new ArrayList<String>();
        NodeList nl = element.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            if (node instanceof Element) {
                Element e = (Element) node;
                if (isExtNamespace(e.getNamespaceURI())) {
                    if (nodeNameEquals(e, DEFAULT_PROPERTIES_ELEMENT)) {
                        if (defaultsRef != null) {
                            throw new ComponentDefinitionException("Only one of " + DEFAULTS_REF_ATTRIBUTE + " attribute or " + DEFAULT_PROPERTIES_ELEMENT + " element is allowed");
                        }
                        Metadata props = parseDefaultProperties(context, metadata, e);
                        metadata.addProperty("defaultProperties", props);
                    } else if (nodeNameEquals(e, LOCATION_ELEMENT)) {
                        locations.add(getTextValue(e));
                    }
                }
            }
        }
        if (!locations.isEmpty()) {
            metadata.addProperty("locations", createList(context, locations));
        }

        validatePlaceholder(metadata, context.getComponentDefinitionRegistry());

        return metadata;
    }