public void addJunction()

in commons-vfs2/src/main/java/org/apache/commons/vfs2/impl/VirtualFileSystem.java [82:122]
29 lines of code
7 McCabe index (conditional complexity)

    public void addJunction(final String junctionPoint, final FileObject targetFile) throws FileSystemException {
        final FileName junctionName = getFileSystemManager().resolveName(getRootName(), junctionPoint);

        // Check for nested junction - these are not supported yet
        if (getJunctionForFile(junctionName) != null) {
            throw new FileSystemException("vfs.impl/nested-junction.error", junctionName);
        }

        try {
            // Add to junction table
            junctions.put(junctionName, targetFile);

            // Attach to file
            final DelegateFileObject junctionFile = (DelegateFileObject) getFileFromCache(junctionName);
            if (junctionFile != null) {
                junctionFile.setFile(targetFile);
            }

            // Create ancestors of junction point
            FileName childName = junctionName;
            boolean done = false;
            for (AbstractFileName parentName = (AbstractFileName) childName.getParent(); !done
                    && parentName != null; childName = parentName, parentName = (AbstractFileName) parentName
                            .getParent()) {
                DelegateFileObject file = (DelegateFileObject) getFileFromCache(parentName);
                if (file == null) {
                    file = new DelegateFileObject(parentName, this, null);
                    putFileToCache(file);
                } else {
                    done = file.exists();
                }

                // As this is the parent of our junction it has to be a folder
                file.attachChild(childName, FileType.FOLDER);
            }

            // TODO - attach all cached children of the junction point to their real file
        } catch (final Exception e) {
            throw new FileSystemException("vfs.impl/create-junction.error", junctionName, e);
        }
    }