--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/store/TreeContext.java	Tue Dec 13 00:00:18 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/store/TreeContext.java	Tue Dec 13 00:25:29 2016 +0900
@@ -12,6 +12,8 @@
 public interface TreeContext {
     public TreeNode getRoot();
 
+    public TreeNode getUnDefineNode();
+
     public TreeContext prev();
 
     public ChangeList getChangeList();

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DefaultTreeContext.java	Tue Dec 13 00:00:18 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DefaultTreeContext.java	Tue Dec 13 00:25:29 2016 +0900
@@ -36,6 +36,11 @@
     }
 
     @Override
+    public TreeNode getUnDefineNode(){
+        return null; // no use
+    }
+
+    @Override
     public TreeContext prev() {
         return previous;
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DifferenceTreeContext.java	Tue Dec 13 00:25:29 2016 +0900
@@ -0,0 +1,91 @@
+package jp.ac.u_ryukyu.ie.cr.jungle.transaction;
+
+import jp.ac.u_ryukyu.ie.cr.jungle.data.list.List;
+import jp.ac.u_ryukyu.ie.cr.jungle.data.treemap.TreeMap;
+import jp.ac.u_ryukyu.ie.cr.jungle.persistent.ChangeList;
+import jp.ac.u_ryukyu.ie.cr.jungle.store.TreeContext;
+import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.TreeNode;
+import jp.ac.u_ryukyu.ie.cr.jungle.store.index.ParentIndex;
+import jp.ac.u_ryukyu.ie.cr.jungle.store.operations.TreeOperation;
+import jp.ac.u_ryukyu.ie.cr.jungle.traverser.InterfaceTraverser;
+
+/**
+ * Created by e115731 on 2016/12/13.
+ */
+public class DifferenceTreeContext implements TreeContext {
+    private final TreeNode root;
+    private final TreeContext previous;
+    private final ChangeList changeList;
+    private final String uuid;
+    private final String treeName;
+    private final long revision;
+    private final InterfaceTraverser traverser;
+    private final TreeNode unDefineNode;
+
+    public DifferenceTreeContext(TreeNode root, TreeNode unDefineNode, TreeContext _prev, ChangeList _log, String _uuid, String _treeName, long _revision, InterfaceTraverser traverser) {
+        this.root = root;
+        this.unDefineNode = unDefineNode;
+        this.previous = _prev;
+        this.changeList = _log;
+        this.uuid = _uuid;
+        this.treeName = _treeName;
+        this.revision = _revision;
+        this.traverser = traverser;
+    }
+
+
+    @Override
+    public TreeNode getRoot() {
+        return root;
+    }
+
+    @Override
+    public TreeNode getUnDefineNode(){
+        return unDefineNode;
+    }
+
+    @Override
+    public TreeContext prev() {
+        return previous;
+    }
+
+    @Override
+    public ChangeList getChangeList() {
+        return changeList;
+    }
+
+    @Override
+    public String uuid() {
+        return uuid;
+    }
+
+    @Override
+    public String getTreeName() {
+        return treeName;
+    }
+
+    @Override
+    public long revision() {
+        return revision;
+    }
+
+    @Override
+    public Iterable<TreeOperation> getOperations() {
+        return changeList;
+    }
+
+    @Override
+    public TreeMap<String, TreeMap<String, List<TreeNode>>> getIndex() {
+        return traverser.getIndex();
+    }
+
+    @Override
+    public ParentIndex getParentIndex() {
+        return traverser.getParentIndex();
+    }
+
+    @Override
+    public InterfaceTraverser getTraverser() {
+        return traverser;
+    }
+}

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungleNetwork/persistent/PersistentTreeContext.java	Tue Dec 13 00:00:18 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungleNetwork/persistent/PersistentTreeContext.java	Tue Dec 13 00:25:29 2016 +0900
@@ -36,6 +36,11 @@
     }
 
     @Override
+    public TreeNode getUnDefineNode() {
+        return null; // not use
+    }
+
+    @Override
     public TreeContext prev() {
         return previous;
     }