Mercurial > hg > Members > kazuma > jungle-ormapper

comparison src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/store/impl/DefaultTreeEditor.java @ 0:44465893e8b8

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author Kazuma
date Wed, 30 Nov 2016 01:47:55 +0900
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-1:000000000000 0:44465893e8b8
1 package jp.ac.u_ryukyu.ie.cr.jungle.store.impl;
2
3
4 import jp.ac.u_ryukyu.ie.cr.jungle.store.NodePath;
5 import jp.ac.u_ryukyu.ie.cr.jungle.store.TreeEditor;
6 import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.logger.LoggingNode;
7 import jp.ac.u_ryukyu.ie.cr.jungle.store.trasnformer.NodeEditor;
8 import jp.ac.u_ryukyu.ie.cr.jungle.traverser.DefaultEvaluator;
9 import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Direction;
10 import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Traversal;
11 import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Traverser;
12 import jp.ac.u_ryukyu.ie.cr.jungle.util.Error;
13 import jp.ac.u_ryukyu.ie.cr.jungle.data.list.List;
14 import jp.ac.u_ryukyu.ie.cr.jungle.util.DefaultEither;
15 import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
16
17 public class DefaultTreeEditor implements TreeEditor
18 {
19 private final Traverser traverser;
20 public DefaultTreeEditor(Traverser traverser)
21 {
22 this.traverser = traverser;
23 }
24
25 @Override
26 public Either<Error,LoggingNode> edit(TreeNode root,NodePath path,NodeEditor editor)
27 {
28 DefaultEvaluator e = new DefaultEvaluator(path);
29 Either<jp.ac.u_ryukyu.ie.cr.jungle.util.Error, Traversal> either = traverser.traverse(root,e);
30
31 if(either.isA()){
32 return DefaultEither.newA(either.a());
33 }
34 Traversal t = either.b();
35 return clone(t,editor);
36 }
37
38 private Either<Error,LoggingNode> clone(Traversal t,NodeEditor editor)
39 {
40 // copying nodes from bottom to root
41
42 List<Direction<TreeNode>> path = new List<>();
43 for(Direction<TreeNode> direction : t){
44 path = path.addLast(direction);
45 }
46
47 // target
48 Direction<TreeNode> targetDirection = path.head();
49 TreeNode target = targetDirection.getTarget();
50 Either<Error,LoggingNode> either = editor.edit(target);
51 if(either.isA()){
52 return DefaultEither.newA(either.a());
53 }
54
55 LoggingNode newWrap = either.b();
56
57 // top
58 int pos = targetDirection.getPosition();
59 TreeNode child = newWrap.getWrap();
60
61
62 for(Direction<TreeNode> parentDirection : path.deleteHead()){
63
64 TreeNodeChildren chs = parentDirection.getTarget().getChildren();
65
66 Either<Error,TreeNode> ret = chs.replaceNode(pos,child);
67 if(ret.isA()){
68 return DefaultEither.newA(ret.a());
69 }
70
71 child = ret.b();
72 pos = parentDirection.getPosition();
73 }
74
75 TreeNode newRoot = child;
76 LoggingNode logNode = editor.wrap(newRoot,newWrap.getOperationLog());
77 return DefaultEither.newB(logNode);
78 }
79
80 }