TreeStructures 1.7.8

Introduction

This is a C# library designed for effectively handling tree structures.
Emphasizing flexibility and extensibility, the library allows easy manipulation of various tree structures.

Features:

1. Rich extension methods for ITreeNode<TNode>
2. Achieving mutual references between parent and child nodes
3. Classes forming a tree structure and their Generality
4. Bidirectional Conversion between Different Data Structures and Tree Structures.

These are the four main features of the library.

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Usage

To be documented in the wiki.

Concept

This library does not aim to be standalone.
Various useful libraries are already available, so we aim to handle tree structure-related functions while coexisting with other libraries.

Let's elaborate on the four features mentioned at the beginning.

Rich Extension Methods

Over 60 extension methods for ITreeNode<TNode> are defined, including various overloads.
Examples include:

Enumeration: Preorder, Levelorder, all traversal methods, Leafs, Ancestors, DiscendArrivals, DescendTraces, etc.
Navigation: Root, NextSibling, LastSibling, etc.
Editing: Including TryAddChild, Try●●Child, Disassemble, RemoveAllDescendant, etc.
Parameter Retrieval: NodeIndex, NodePath, Height, Depth, etc.
Predicate Methods: IsDescendantOf, IsAncestorOf, IsRoot, etc.
Conversion: ToNodeMap, ToSerializableNodeMap, ToTreeDiagram, AsValuedTreeNode
Assembly Methods: Convert, AssembleTree, AssembleAsNAryTree

Mutual References Between Parent and Child Nodes

Mutual references between parent and child nodes are handled by base classes (TreeNodeBase<TNode> or HierarchyWrapper<TSrc,TWrpr>).

In the derived types of TreeNodeBase<TNode>, customization can be achieved through protected virtual methods such as RemoveChildProcess and InsertChildProcess, which are defined as ●●ChildProcess methods.

Classes Forming a Tree Structure and Their Generality

If you want to customize in detail, use TreeNodeBase<TNode>.
For a GeneralTree, if you want to use it as a data structure or container for data, use GeneralTreeNode<TNode> or ObservableTreeNode<TNode>.
If you want to use an N-Ary Tree with a fixed number of branches and empty nodes set to null, use NAryTreeNode<TNode>.
If you want to use it as a wrapper for objects or tree structure that forms the hierarchy, use (Hierarchy | TreeNode) Wrapper<TSrc,TWrpr>.
If you need to handle resource disposal and observation, along with its role as a wrapper (e.g., ViewModel in MVVM), inherit and use Bindable(Hierarchy | TreeNode)Wrapper<TSrc,TWrpr>.

In TreeNodeBase<TNode> and its derived types, you can customize the collections used internally and those exposed externally by overriding the Setup(Inner | Public)ChildCollection methods.
HierarchyWrapper<TSrc,TWrpr> and its derived types allow customization only of the collection exposed externally.

Bidirectional Conversion between Different Data Structures and Tree Structures.

Support is provided for exte ITreeNode<TNode> methods to objects that do not implement ITreeNode<TNode>.
This is achieved by wrapping objects in a HierarchyWrapper<TSrc,TWrpr> or BindableHierarchyWrapper<TSrc,TWrpr>, or by calling AsValuedTreeNode to provide the extension methods of ITreeNode<TNode>.

Furthermore, various methods for mutual conversion, such as Convert, AssembleTree, and ToNodeMap, are available through extension methods.

Namespaces Classification

TreeStructures;

　Abstract classes define generic tree nodes, peripheral objects, and event arguments.

Inheritance diagram of generic tree nodes

Inheritance diagram of NodePath and NodeIndex (peripheral objects)

TreeStructures.Linq;

　Extension methods for ITreeNode<TNode>, IMutableTreeNode<TNode>, IEnumerable<T>

TreeStructures.Utility;

　Definition of ResultWithValue<T> used as a return value for Try●● methods

TreeStructures.Collections;

　It defines collections used in internal implementations or processing steps of extension methods.
　These include the synchronizable ImitableCollection<TSrc,TConv>,
　the combinable observable collection CombinableObservableCollection<T>,
　and the ReadOnlySortFilterObservableCollection<T> that applies sorting and filtering while synchronizing with an observable collection.

TreeStructures.EventManagement;

　Objects used in event handling, implementing Observable tree nodes

TreeStructures.Xml.Serialization;

　Dictionary and others used in serialization and deserialization

TreeStrucutures.Tree;

　Purpose-specific trees