Mercurial > hg > Members > nobuyasu > jungle-network
view src/jungle/app/bbs/JungleManager.java @ 90:eef737ab3b2c
Modified JungleManager class
author | one |
---|---|
date | Mon, 11 Nov 2013 19:06:56 +0900 |
parents | 87ec5dd0dc27 |
children | 75cf01a430a6 |
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package jungle.app.bbs; import java.io.IOException; import java.nio.ByteBuffer; import java.util.Iterator; import alice.jungle.datasegment.store.container.DefaultTreeOperationLogContainer; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.Jungle; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTree; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.Command; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.NodePath; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath; import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.DefaultTreeOperationLog; 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 JungleManager { private static JungleManager jm = new JungleManager(); private Jungle jungle; private static int NOT_CHANGE_POSITION = 0; private JungleManager() { } public static void setJungle(Jungle _j) { jm.jungle = _j; } public static Jungle getJungle() { return jm.jungle; } public static JungleTree createNewTree(String name) { return jm.jungle.createNewTree(name); } public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor ,TreeOperationLog _log, int pos) { JungleTreeEditor editor = _editor; Either<Error, JungleTreeEditor> either = null; for (TreeOperation op : _log) { either = _edit(editor, op, pos); if(either.isA()) { return either; } editor = either.b(); } return either; } private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor, TreeOperation op, int _pos) { NodePath path = new DefaultNodePath(); NodeOperation nodeOp = op.getNodeOperation(); int pos = _pos; if (_pos == NOT_CHANGE_POSITION ) { pos = nodeOp.getPosition(); } Command c = nodeOp.getCommand(); String key = ""; switch (c) { case PUT_ATTRIBUTE: path = op.getNodePath(); 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; } public static Either<Error, JungleTreeEditor> update(DefaultTreeOperationLogContainer container) { DefaultTreeOperationLog log = null; try { log = container.convert(); } catch (IOException e) { e.printStackTrace(); } String treeName = container.getTreeName(); if (JungleManager.getJungle().getTreeByName(treeName) == null) { if(null == JungleManager.getJungle().createNewTree(treeName)){ throw new IllegalStateException(); } } JungleTree tree = JungleManager.getJungle().getTreeByName(treeName); JungleTreeEditor editor = tree.getTreeEditor(); int pos = calculatePosition(tree.getRootNode(), container.getTimeStamp()); Either<Error, JungleTreeEditor> either = JungleManager.edit(editor, log, pos); if(either.isA()) { throw new IllegalStateException(); } editor = either.b(); either = editor.success(); if(either.isA()) { throw new IllegalStateException(); } return either; } private static int calculatePosition(Node node, long newNodeTimeStamp) { int count = 0; long childTimeStamp = 0; for(Iterator<Node> iter = node.getChildren().iterator();iter.hasNext();) { Node n = iter.next(); if(n.getAttributes().get("timestamp") == null) { return NOT_CHANGE_POSITION; } if(n.getAttributes().get("timestamp") != null) { childTimeStamp = n.getAttributes().get("timestamp").getLong(); if (newNodeTimeStamp < childTimeStamp) { break; } } count++; } return count; } }