--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/csharp/jp.ac.u-ryukyu.ie.cr/jungle-main/transaction/DefaultTreeContext.cs	Sun Oct 23 07:40:50 2016 +0900
@@ -0,0 +1,63 @@
+using UnityEngine;
+using System.Collections.Generic;
+
+// override need? 
+
+public class DefaultTreeContext : TreeContext {
+	private TreeNode root;
+	private TreeContext previous;
+	private ChangeList changeList;
+	private string uuid;
+	private string treeName;
+	private long revision;
+	private InterfaceTraverser traverser;
+
+	public DefaultTreeContext(TreeNode _node, TreeContext _prev, ChangeList _log, string _uuid, string _treeName, long _revision, InterfaceTraverser traverser) {
+		this.root = _node;
+		this.previous = _prev;
+		this.changeList = _log;
+		this.uuid = _uuid;
+		this.treeName = _treeName;
+		this.revision = _revision;
+		this.traverser = traverser;
+	}
+
+	public TreeNode getRoot() {
+		return root;
+	}
+
+	public TreeContext prev() {
+		return previous;
+	}
+
+	public ChangeList getChangeList() {
+		return changeList;
+	}
+		
+	public string getUuid() {
+		return uuid;
+	}
+
+	public string getTreeName() {
+		return treeName;
+	}
+
+	public long getRevision() {
+		return revision;
+	}
+
+	public IEnumerable<TreeOperation> getOperations() {
+		return changeList;
+	}
+
+	public TreeMap<string, TreeMap<string, List<TreeNode>>> getIndex() {
+		return traverser.getIndex ();
+	}
+
+	// don't write parent Index.
+
+	public InterfaceTraverser getTraverser() {
+		return traverser;
+	}
+
+}