Mercurial > hg > Database > jungle-network
view src/main/java/alice/jungle/persistent/JungleUpdater.java @ 105:f9e29a52efd3
Move some files
author | one |
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date | Tue, 26 Nov 2013 06:43:10 +0900 |
parents | src/alice/jungle/persistence/JungleUpdater.java@e641f559559c |
children |
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package alice.jungle.persistent; import java.nio.ByteBuffer; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.Command; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.NodeOperation; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error; public class JungleUpdater { public JungleUpdater() { } public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor ,TreeOperationLog _log) { JungleTreeEditor editor = _editor; Either<Error, JungleTreeEditor> either = null; for (TreeOperation op : _log) { either = _edit(editor, op); if(either.isA()) { return either; } editor = either.b(); } return either; } private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor, TreeOperation op) { DefaultNodePath path = new DefaultNodePath(); NodeOperation nodeOp = op.getNodeOperation(); int pos = nodeOp.getPosition(); Command c = nodeOp.getCommand(); String key = ""; switch (c) { case PUT_ATTRIBUTE: key = nodeOp.getKey(); ByteBuffer value = nodeOp.getValue(); return editor.putAttribute(path, key, value); case DELETE_ATTRIBUTE: key = nodeOp.getKey(); return editor.deleteAttribute(path, key); case APPEND_CHILD: return editor.addNewChildAt(path, pos); case DELETE_CHILD: return editor.deleteChildAt(path, 0); } return null; } }