1 /*******************************************************************************
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2 * Copyright (c) 2013 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 * Semantum Oy - initial API and implementation
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12 *******************************************************************************/
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13 package org.simantics.db.layer0;
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15 import java.util.ArrayList;
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16 import java.util.List;
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17 import java.util.Map;
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18 import java.util.Set;
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19 import java.util.concurrent.atomic.AtomicBoolean;
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21 import org.simantics.databoard.Bindings;
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22 import org.simantics.databoard.binding.Binding;
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23 import org.simantics.databoard.binding.VariantBinding;
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24 import org.simantics.databoard.binding.error.BindingConstructionException;
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25 import org.simantics.databoard.binding.error.BindingException;
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26 import org.simantics.databoard.binding.error.RuntimeBindingConstructionException;
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27 import org.simantics.databoard.binding.mutable.Variant;
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28 import org.simantics.databoard.type.Datatype;
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29 import org.simantics.db.exception.DatabaseException;
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30 import org.simantics.simulator.variable.NodeManager;
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31 import org.simantics.simulator.variable.Realm;
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32 import org.simantics.simulator.variable.exceptions.NoSuchNodeException;
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33 import org.simantics.simulator.variable.exceptions.NodeManagerException;
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34 import org.simantics.simulator.variable.exceptions.NotInRealmException;
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36 import gnu.trove.map.hash.THashMap;
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37 import gnu.trove.procedure.TObjectProcedure;
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38 import gnu.trove.set.hash.THashSet;
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41 * StandardNodeManager gives default implementations to some methods
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44 * @author Antti Villberg
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46 public abstract class StandardNodeManager<Node,Engine extends StandardEngine<Node>> implements NodeManager<Node> {
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48 final private Node root;
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49 final private StandardRealm<Node,Engine> realm;
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51 final static Binding NO_BINDING = new VariantBinding() {
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54 public Object getContent(Object variant, Binding contentBinding) throws BindingException {
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59 public Object getContent(Object variant) throws BindingException {
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64 public Datatype getContentType(Object variant) throws BindingException {
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69 public Binding getContentBinding(Object variant) throws BindingException {
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74 public Object create(Binding contentBinding, Object content) throws BindingException {
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79 public void setContent(Object variant, Binding contentBinding, Object content) throws BindingException {
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84 public boolean isInstance(Object obj) {
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89 public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
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94 public int compare(Object o1, Object o2) throws org.simantics.databoard.binding.error.RuntimeBindingException {
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99 return - System.identityHashCode(o2);
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103 return System.identityHashCode(o1);
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105 if(o1.equals(o2)) return 0;
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106 return System.identityHashCode(o1) - System.identityHashCode(o2);
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113 THashMap<Node, Object> valueCache = new THashMap<Node, Object>();
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114 protected THashMap<Node, THashSet<Runnable>> listeners = new THashMap<Node, THashSet<Runnable>>();
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116 AtomicBoolean fireNodeListenersScheduled = new AtomicBoolean(false);
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117 Runnable fireNodeListeners = new Runnable() {
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119 public void run() {
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120 fireNodeListenersScheduled.set(false);
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121 final TObjectProcedure<Runnable> procedure = new TObjectProcedure<Runnable>() {
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123 public boolean execute(Runnable object) {
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128 synchronized(listeners) {
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129 listeners.forEachValue(new TObjectProcedure<THashSet<Runnable>>() {
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131 public boolean execute(THashSet<Runnable> object) {
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132 object.forEach(procedure);
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140 Runnable clearValueCache = new Runnable() {
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142 public void run() {
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143 valueCache.clear();
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147 public StandardNodeManager(StandardRealm<Node,Engine> realm, Node root) {
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148 this.realm = realm;
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153 public List<String> getChildNames(Node node) throws NodeManagerException {
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154 List<Node> children = getChildren(node);
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155 ArrayList<String> names = new ArrayList<String>(children.size());
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156 for(Node child : children)
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157 names.add(getName(child));
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162 public List<String> getPropertyNames(Node node) throws NodeManagerException {
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163 List<Node> properties = getProperties(node);
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164 ArrayList<String> names = new ArrayList<String>(properties.size());
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165 for(Node property : properties)
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166 names.add(getName(property));
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171 public Object getValue(Node node, String propertyName, Binding binding)
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172 throws NodeManagerException, BindingException {
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173 Node property = getProperty(node, propertyName);
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174 if(property == null)
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175 throw new NoSuchNodeException("Didn't find a property " + propertyName);
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176 return getValue(property, binding);
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180 public void setValue(Node node, String propertyName, Object value,
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181 Binding binding) throws NodeManagerException, BindingException {
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182 Node property = getProperty(node, propertyName);
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183 if(property == null)
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184 throw new NoSuchNodeException("Didn't find a property " + propertyName);
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185 setValue(property, value, binding);
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189 public Variant getValue(Node node) throws NodeManagerException {
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190 Object value = getEngineValueOrCached(node);
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191 if (value instanceof Variant)
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192 return (Variant) value;
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194 Binding binding = Bindings.getBinding(value.getClass());
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195 return new Variant(binding, value);
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196 } catch (BindingConstructionException e) {
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197 e.printStackTrace();
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203 public Variant getValue(Node node, String propertyName)
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204 throws NodeManagerException {
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205 Node property = getProperty(node, propertyName);
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206 if(property == null)
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207 throw new NoSuchNodeException("Didn't find a property " + propertyName);
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208 return getValue(property);
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212 public String getPropertyURI(Node parent, Node property) {
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217 public Realm getRealm() {
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221 public StandardRealm<Node, Engine> getStandardRealm() {
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225 protected String getRealmId() {
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229 public Node getRoot() {
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233 protected boolean isRoot(Node node) {
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234 return root.equals(node);
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238 public void addNodeListener(Node node, Runnable listener) {
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239 synchronized(listeners) {
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240 THashSet<Runnable> l = listeners.get(node);
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242 l = new THashSet<Runnable>();
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243 listeners.put(node, l);
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247 getRealm().asyncExec(listener);
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251 public void removeNodeListener(Node node, Runnable listener) {
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252 synchronized(listeners) {
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253 THashSet<Runnable> l = listeners.get(node);
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255 l.remove(listener);
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257 listeners.remove(node);
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262 public void fireNodeListeners() {
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263 if(!fireNodeListenersScheduled.getAndSet(true))
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264 realm.asyncExec(fireNodeListeners);
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267 public void fireNodeListenersSync() {
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269 realm.syncExec(fireNodeListeners);
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270 } catch (InterruptedException e) {
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271 e.printStackTrace();
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275 public void refreshVariables() {
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276 realm.asyncExec(clearValueCache);
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277 fireNodeListeners();
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280 public void refreshVariablesSync() {
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282 realm.syncExec(clearValueCache);
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283 } catch (InterruptedException e) {
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284 e.printStackTrace();
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286 fireNodeListenersSync();
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289 protected Object getEngineValueOrCached(Node node) throws NodeManagerException {
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290 Object value = valueCache.get(node);
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291 if(value == null) {
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292 value = realm.getEngine().getValue(node);
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293 valueCache.put(node, value);
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300 public Object getValue(Node node, Binding binding) throws NodeManagerException {
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301 checkThreadAccess();
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302 return getEngineValueOrCached(node);
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305 protected void checkThreadAccess() throws NodeManagerException {
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306 if(Thread.currentThread() != realm.getThread())
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307 throw new NotInRealmException();
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310 protected Datatype getDatatypeForValue(Object value) throws DatabaseException {
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311 Binding binding = Bindings.getBindingUnchecked(value.getClass());
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312 if(binding == null) return null;
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313 else return binding.type();
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317 public void setValue(Node node, Object value, Binding binding)
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318 throws NodeManagerException {
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319 checkThreadAccess();
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320 valueCache.put(node, value);
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321 realm.getEngine().setValue(node, value);
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322 realm.nodeManager.valueCache.put(node, value);
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323 refreshVariables();
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327 public String getName(Node node) {
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329 String id = getRealmId();
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330 int lastSlash = id.lastIndexOf("/");
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331 if(lastSlash == -1) throw new IllegalStateException("Invalid realm id " + id);
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332 String name = id.substring(lastSlash+1);
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335 return realm.getEngine().getName(node);
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341 public Node getNode(String path) throws NodeManagerException {
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342 checkThreadAccess();
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343 throw new UnsupportedOperationException();
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347 public Node getChild(Node node, String name) throws NodeManagerException {
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348 checkThreadAccess();
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349 Map<String,Node> map = realm.getEngine().getChildren(node);
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350 return map.get(name);
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354 public Node getProperty(Node node, String name) throws NodeManagerException {
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355 checkThreadAccess();
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356 Map<String,Node> map = realm.getEngine().getProperties(node);
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357 return map.get(name);
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361 public List<Node> getChildren(Node node) throws NodeManagerException {
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362 checkThreadAccess();
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363 return new ArrayList<Node>(realm.getEngine().getChildren(node).values());
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367 public List<Node> getProperties(Node node) throws NodeManagerException {
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368 checkThreadAccess();
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369 return new ArrayList<Node>(realm.getEngine().getProperties(node).values());
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373 public Datatype getDatatype(Node node) throws NodeManagerException {
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374 checkThreadAccess();
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376 Datatype type = getDatatypeForValue(getEngineValueOrCached(node));
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378 } catch (DatabaseException e) {
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379 e.printStackTrace();
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380 } catch (RuntimeBindingConstructionException e) {
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381 // There is no datatype for all values
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