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1 package jp.ac.u_ryukyu.ie.cr.jungleNetwork.transaction;
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2
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3
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4 import jp.ac.u_ryukyu.ie.cr.jungle.transaction.editor.jungleTreeEditor.JungleTreeEditor;
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5 import jp.ac.u_ryukyu.ie.cr.jungle.store.Command;
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6 import jp.ac.u_ryukyu.ie.cr.jungle.store.nodepath.NodePath;
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7 import jp.ac.u_ryukyu.ie.cr.jungle.store.operations.NodeOperation;
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8 import jp.ac.u_ryukyu.ie.cr.jungle.store.operations.TreeOperation;
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9 import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
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10 import jp.ac.u_ryukyu.ie.cr.jungle.util.Error;
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11
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12 import java.nio.ByteBuffer;
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13
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14 public class JungleUpdater {
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15
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16 public JungleUpdater() {
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17
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18 }
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19
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20 public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor, Iterable<TreeOperation> _log) {
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21 JungleTreeEditor editor = _editor;
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22 Either<Error, JungleTreeEditor> either = null;
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23 for (TreeOperation op : _log) {
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24 NodePath path = op.getNodePath();
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25 NodeOperation nodeOp = op.getNodeOperation();
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26 either = _edit(editor, path, nodeOp, nodeOp.getPosition());
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27 if (either.isA()) {
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28 return either;
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29 }
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30 editor = either.b();
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31 }
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32 return either;
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33 }
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34
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35 /*
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36 * This method decide node position by param.
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37 */
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38 public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor, Iterable<TreeOperation> _log, int pos) {
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39 JungleTreeEditor editor = _editor;
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40 Either<Error, JungleTreeEditor> either = null;
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41 for (TreeOperation op : _log) {
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42 NodePath path = op.getNodePath();
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43 NodeOperation nodeOp = op.getNodeOperation();
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44 either = _edit(editor, path, nodeOp, pos);
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45 if (either.isA()) {
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46 return either;
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47 }
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48 editor = either.b();
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49 }
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50 return either;
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51 }
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52
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53
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54 private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor, NodePath path, NodeOperation nodeOp, int pos) {//posはmergeの時に使う？
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55 String key = "";
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56 Command c = nodeOp.getCommand();
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57 int num;
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58 switch (c) {
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59 case PUT_ATTRIBUTE:
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60 key = nodeOp.getKey();
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61 ByteBuffer value = nodeOp.getValue();
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62 return editor.putAttribute(path, key, value);
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63 case DELETE_ATTRIBUTE:
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64 key = nodeOp.getKey();
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65 return editor.deleteAttribute(path, key);
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66 case APPEND_CHILD:
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67 num = nodeOp.getPosition();
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68 return editor.addNewChildAt(path, num);
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69 case DELETE_CHILD:
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70 num = nodeOp.getPosition();
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71 return editor.deleteChildAt(path, num);
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72 }
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73 return null;
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74 }
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75
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76 }
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