From 3e58d39dcffe2285e239ec29a49c1b65d0a0f582 Mon Sep 17 00:00:00 2001
From: XenoAmess <xenoamess@gmail.com>
Date: Sun, 16 Dec 2018 15:17:37 +0800
Subject: [PATCH] 0.31

0.31
---
 src/main/java/com/xenoamess/x8l/ContentNode.java | 12 +++---------
 src/main/java/com/xenoamess/x8l/TreeNode.java    |  6 +++++-
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/src/main/java/com/xenoamess/x8l/ContentNode.java b/src/main/java/com/xenoamess/x8l/ContentNode.java
index cf364fa..7f13850 100644
--- a/src/main/java/com/xenoamess/x8l/ContentNode.java
+++ b/src/main/java/com/xenoamess/x8l/ContentNode.java
@@ -10,22 +10,16 @@
 import java.util.Map;
 
 public class ContentNode extends TreeNode {
-    public List<TreeNode> children = null;
-    public Map<String, String> attributes = null;
-    public List<String> attributesKeyList = null;
+    public List<TreeNode> children = new ArrayList<TreeNode>();
+    public Map<String, String> attributes = new HashMap<String, String>();
+    public List<String> attributesKeyList = new ArrayList<String>();
 
     public ContentNode(ContentNode parent) {
         super(parent);
-        this.children = new ArrayList<TreeNode>();
-        this.attributes = new HashMap<String, String>();
-        this.attributesKeyList = new ArrayList<String>();
     }
 
     public ContentNode(ContentNode parent, int index) {
         super(parent, index);
-        this.children = new ArrayList<TreeNode>();
-        this.attributes = new HashMap<String, String>();
-        this.attributesKeyList = new ArrayList<String>();
     }
 
     public void addAttribute(String key, String value) {
diff --git a/src/main/java/com/xenoamess/x8l/TreeNode.java b/src/main/java/com/xenoamess/x8l/TreeNode.java
index bd16195..1d494a5 100644
--- a/src/main/java/com/xenoamess/x8l/TreeNode.java
+++ b/src/main/java/com/xenoamess/x8l/TreeNode.java
@@ -51,12 +51,16 @@ public TreeNode changeParent(ContentNode contentNode) {
         return this;
     }
 
-    public TreeNode changeParent(ContentNode contentNode, int index) {
+    public TreeNode changeParentAndRegister(ContentNode contentNode, int index) {
         this.changeParent(contentNode);
         this.parent.children.add(index, this);
         return this;
     }
 
+    public TreeNode changeParentAndRegister(ContentNode contentNode) {
+        return this.changeParentAndRegister(contentNode, this.parent.children.size());
+    }
+
     public abstract void output(Writer writer);
 
     public abstract void format(int space);