/**
* Return sif the node is shared or has any children that are shared.
*
* @return if the node is shared or has a shared sub-section
*/
public boolean isSharedOrHasSharedChildren() {
if (isShared()) {
// this is a shared file or a shared (sub) folder
return true;
}
if (this instanceof FileIndex) {
// is not shared and is of type 'file'
return false;
} else {
// is of type 'folder', check all subfolders
List<Index> children = getIndexList(this);
for (Index child : children) {
if (child.isFolder()) {
FolderIndex subfolder = (FolderIndex) child;
if (subfolder.getSharedFlag()) {
return true;
}
}
}
}
// no case above matches
return false;
}
/**
* Walks recursively through the file tree and returns a preorder list
*
* @param node The root node from which the digest is started.
* @return The digest in preorder
*/
public static List<Index> getIndexList(Index node) {
List<Index> digest = new ArrayList<Index>();
// add self
digest.add(node);
// add children
if (node.isFolder()) {
FolderIndex folder = (FolderIndex) node;
for (Index child : folder.getChildren()) {
digest.addAll(getIndexList(child));
}
}
return digest;
}
/**
* Returns the full path (starting at the root) of this node
*
* @return
*/
public Path getFullPath() {
if (parent == null) {
return Paths.get("");
} else {
return Paths.get(parent.getFullPath().toString(), getName());
}
}
/**
* Returns the folder that is shared (can be this node or a parent / grand-parent / ... of this
* node
*
* @return
*/
public FolderIndex getSharedTopFolder() {
if (this instanceof FileIndex) {
// is not shared and is of type files (this has no children)
return parent.getSharedTopFolder();
} else {
// is of type folder
FolderIndex folder = (FolderIndex) this;
if (folder.getSharedFlag()) {
// this is the top-most shared folder because the shared flag is activated
return folder;
} else if (folder.isRoot()) {
// the root folder is never shared
return null;
} else {
// move one level up (recursion)
return parent.getSharedTopFolder();
}
}
}
public Index(KeyPair fileKeys, String name, FolderIndex parent) {
this.fileKeys = fileKeys;
this.name = name;
this.parent = parent;
if (parent != null) parent.addChild(this);
}
