protected ResourceMeta deriveResourceMeta()

in extscript-core-root/extscript-core/src/main/java/org/apache/myfaces/extensions/scripting/jsf/resources/deprecated/SourceResourceHandler.java [113:209]
85 lines of code
22 McCabe index (conditional complexity)

    protected ResourceMeta deriveResourceMeta(ResourceLoader resourceLoader,
                                              String resourceName, String libraryName) {
        String localePrefix = getLocalePrefixForLocateResource();
        String resourceVersion = null;
        String libraryVersion = null;
        ResourceMeta resourceId = null;

        //1. Try to locate resource in a localized path
        if (localePrefix != null) {
            if (null != libraryName) {
                String pathToLib = localePrefix + '/' + libraryName;
                libraryVersion = resourceLoader.getLibraryVersion(pathToLib);

                if (null != libraryVersion) {
                    String pathToResource = localePrefix + '/'
                            + libraryName + '/' + libraryVersion + '/'
                            + resourceName;
                    resourceVersion = resourceLoader
                            .getResourceVersion(pathToResource);
                } else {
                    String pathToResource = localePrefix + '/'
                            + libraryName + '/' + resourceName;
                    resourceVersion = resourceLoader
                            .getResourceVersion(pathToResource);
                }

                if (!(resourceVersion != null && ResourceLoader.VERSION_INVALID.equals(resourceVersion))) {
                    resourceId = resourceLoader.createResourceMeta(localePrefix, libraryName,
                            libraryVersion, resourceName, resourceVersion);
                }
            } else {
                resourceVersion = resourceLoader
                        .getResourceVersion(localePrefix + '/' + resourceName);
                if (!(resourceVersion != null && ResourceLoader.VERSION_INVALID.equals(resourceVersion))) {
                    resourceId = resourceLoader.createResourceMeta(localePrefix, null, null,
                            resourceName, resourceVersion);
                } else if (resourceVersion == ResourceLoader.VERSION_INVALID) {
                    resourceId = resourceLoader.createResourceMeta(null, libraryName,
                            null, resourceName, null);
                }
            }

            if (resourceId != null) {
                URL url = resourceLoader.getResourceURL(resourceId);
                if (url == null) {
                    resourceId = null;
                }
            }
        }

        //2. Try to localize resource in a non localized path
        if (resourceId == null) {
            if (null != libraryName) {
                libraryVersion = resourceLoader.getLibraryVersion(libraryName);

                if (null != libraryVersion) {
                    String pathToResource = (libraryName + '/' + libraryVersion
                            + '/' + resourceName);
                    resourceVersion = resourceLoader
                            .getResourceVersion(pathToResource);
                } else {
                    String pathToResource = (libraryName + '/'
                            + resourceName);
                    resourceVersion = resourceLoader
                            .getResourceVersion(pathToResource);
                }

                if (!(resourceVersion != null && ResourceLoader.VERSION_INVALID.equals(resourceVersion))) {
                    resourceId = resourceLoader.createResourceMeta(null, libraryName,
                            libraryVersion, resourceName, resourceVersion);
                } else if (resourceVersion == ResourceLoader.VERSION_INVALID) {
                    resourceId = resourceLoader.createResourceMeta(null, libraryName,
                            libraryVersion, resourceName, null);
                }
            } else {
                resourceVersion = resourceLoader
                        .getResourceVersion(resourceName);

                if (!(resourceVersion != null && ResourceLoader.VERSION_INVALID.equals(resourceVersion))) {
                    resourceId = resourceLoader.createResourceMeta(null, null, null,
                            resourceName, resourceVersion);
                } else if (resourceVersion == ResourceLoader.VERSION_INVALID) {
                    resourceId = resourceLoader.createResourceMeta(null, null,
                            null, resourceName, null);
                }
            }

            if (resourceId != null) {
                URL url = resourceLoader.getResourceURL(resourceId);
                if (url == null) {
                    resourceId = null;
                }
            }
        }

        return resourceId;
    }