public FileObject resolveFile()

in commons-vfs2/src/main/java/org/apache/commons/vfs2/impl/DefaultFileSystemManager.java [763:805]
29 lines of code
10 McCabe index (conditional complexity)

    public FileObject resolveFile(final FileObject baseFile, final String uri,
            final FileSystemOptions fileSystemOptions) throws FileSystemException {
        final FileObject realBaseFile;
        if (baseFile != null && VFS.isUriStyle() && baseFile.getName().isFile()) {
            realBaseFile = baseFile.getParent();
        } else {
            realBaseFile = baseFile;
        }
        // TODO: use resolveName and use this name to resolve the fileObject

        UriParser.checkUriEncoding(uri);

        if (uri == null) {
            throw new IllegalArgumentException();
        }

        // Extract the scheme
        final String scheme = UriParser.extractScheme(getSchemes(), uri);
        if (scheme != null) {
            // An absolute URI - locate the provider
            final FileProvider provider = providers.get(scheme);
            if (provider != null) {
                return provider.findFile(realBaseFile, uri, fileSystemOptions);
            }
            // Otherwise, assume a local file
        }

        // Handle absolute file names
        if (localFileProvider != null && localFileProvider.isAbsoluteLocalName(uri)) {
            return localFileProvider.findLocalFile(uri);
        }

        if (scheme != null) {
            // An unknown scheme - hand it to the default provider
            FileSystemException.requireNonNull(defaultProvider, "vfs.impl/unknown-scheme.error", scheme, uri);
            return defaultProvider.findFile(realBaseFile, uri, fileSystemOptions);
        }

        // Assume a relative name - use the supplied base file
        FileSystemException.requireNonNull(realBaseFile, "vfs.impl/find-rel-file.error", uri);

        return realBaseFile.resolveFile(uri);
    }