--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2013 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ * Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.simulator.toolkit;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.adapter.AdaptException;
+import org.simantics.databoard.adapter.Adapter;
+import org.simantics.databoard.adapter.AdapterConstructionException;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.databoard.binding.VariantBinding;
+import org.simantics.databoard.binding.error.BindingException;
+import org.simantics.databoard.binding.error.RuntimeBindingConstructionException;
+import org.simantics.databoard.binding.mutable.Variant;
+import org.simantics.databoard.type.Datatype;
+import org.simantics.simulator.variable.NodeManager;
+import org.simantics.simulator.variable.Realm;
+import org.simantics.simulator.variable.exceptions.NoSuchNodeException;
+import org.simantics.simulator.variable.exceptions.NodeManagerException;
+import org.simantics.simulator.variable.exceptions.NotInRealmException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import gnu.trove.map.hash.THashMap;
+import gnu.trove.procedure.TObjectProcedure;
+import gnu.trove.set.hash.THashSet;
+
+/**
+ * StandardNodeManager gives default implementations to some methods
+ * of NodeManager.
+ *
+ * @author Antti Villberg
+ */
+public abstract class StandardNodeManager<Node, Engine extends StandardNodeManagerSupport<Node>> implements NodeManager<Node> {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(StandardNodeManager.class);
+
+ private final Node root;
+ private final StandardRealm<Node,Engine> realm;
+
+ static final Binding NO_BINDING = new VariantBinding() {
+
+ @Override
+ public Object getContent(Object variant, Binding contentBinding) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public Object getContent(Object variant) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public Datatype getContentType(Object variant) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public Binding getContentBinding(Object variant) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public Object create(Binding contentBinding, Object content) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public void setContent(Object variant, Binding contentBinding, Object content) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public boolean isInstance(Object obj) {
+ return true;
+ }
+
+ @Override
+ public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
+ throw new Error();
+ }
+
+ @Override
+ public int compare(Object o1, Object o2) throws org.simantics.databoard.binding.error.RuntimeBindingException {
+ if(o1 == null) {
+ if(o2 == null) {
+ return 0;
+ } else {
+ return - System.identityHashCode(o2);
+ }
+ } else {
+ if(o2 == null) {
+ return System.identityHashCode(o1);
+ } else {
+ if(o1.equals(o2)) return 0;
+ return System.identityHashCode(o1) - System.identityHashCode(o2);
+ }
+ }
+ }
+
+ };
+
+ THashMap<Node, Variant> valueCache = new THashMap<>();
+ protected THashMap<Node, THashSet<Runnable>> listeners = new THashMap<>();
+
+ AtomicBoolean fireNodeListenersScheduled = new AtomicBoolean(false);
+ Runnable fireNodeListeners = new Runnable() {
+ @Override
+ public void run() {
+ fireNodeListenersScheduled.set(false);
+ TObjectProcedure<Runnable> procedure = r -> {
+ r.run();
+ return true;
+ };
+ synchronized(listeners) {
+ listeners.forEachValue(set -> {
+ set.forEach(procedure);
+ return true;
+ });
+ }
+ }
+ };
+
+ Runnable clearValueCache = () -> valueCache.clear();
+
+ public StandardNodeManager(StandardRealm<Node,Engine> realm, Node root) {
+ assert(realm != null);
+ assert(root != null);
+ this.realm = realm;
+ this.root = root;
+ }
+
+ @Override
+ public List<String> getChildNames(Node node) throws NodeManagerException {
+ List<Node> children = getChildren(node);
+ ArrayList<String> names = new ArrayList<>(children.size());
+ for(Node child : children)
+ names.add(getName(child));
+ return names;
+ }
+
+ @Override
+ public List<String> getPropertyNames(Node node) throws NodeManagerException {
+ List<Node> properties = getProperties(node);
+ ArrayList<String> names = new ArrayList<>(properties.size());
+ for(Node property : properties)
+ names.add(getName(property));
+ return names;
+ }
+
+ @Override
+ public Object getValue(Node node, String propertyName, Binding binding)
+ throws NodeManagerException, BindingException {
+ Node property = getProperty(node, propertyName);
+ if(property == null)
+ throw new NoSuchNodeException("Didn't find a property " + propertyName);
+ return getValue(property, binding);
+ }
+
+ @Override
+ public void setValue(Node node, String propertyName, Object value,
+ Binding binding) throws NodeManagerException, BindingException {
+ Node property = getProperty(node, propertyName);
+ if(property == null)
+ throw new NoSuchNodeException("Didn't find a property " + propertyName);
+ setValue(property, value, binding);
+ }
+
+ @Override
+ public Variant getValue(Node node, String propertyName)
+ throws NodeManagerException {
+ Node property = getProperty(node, propertyName);
+ if(property == null)
+ throw new NoSuchNodeException("Didn't find a property " + propertyName);
+ return getValue(property);
+ }
+
+ @Override
+ public Object getValue(Node node, Binding binding) throws NodeManagerException, BindingException {
+ try {
+ return getValue(node).getValue(binding);
+ } catch (AdaptException e) {
+ throw new BindingException(e);
+ }
+ }
+
+ @Override
+ public String getPropertyURI(Node parent, Node property) {
+ return null;
+ }
+
+ @Override
+ public Realm getRealm() {
+ return realm;
+ }
+
+ public StandardRealm<Node, Engine> getStandardRealm() {
+ return realm;
+ }
+
+ protected String getRealmId() {
+ return realm.getId();
+ }
+
+ public Node getRoot() {
+ return root;
+ }
+
+ protected boolean isRoot(Node node) {
+ return root.equals(node);
+ }
+
+ @Override
+ public void addNodeListener(Node node, Runnable listener) {
+ synchronized(listeners) {
+ THashSet<Runnable> l = listeners.get(node);
+ if(l == null) {
+ l = new THashSet<>();
+ listeners.put(node, l);
+ }
+ l.add(listener);
+ }
+ getRealm().asyncExec(listener);
+ }
+
+ @Override
+ public void removeNodeListener(Node node, Runnable listener) {
+ synchronized(listeners) {
+ THashSet<Runnable> l = listeners.get(node);
+ if(l != null) {
+ l.remove(listener);
+ if(l.isEmpty())
+ listeners.remove(node);
+ }
+ }
+ }
+
+ public void fireNodeListeners() {
+ if(!fireNodeListenersScheduled.getAndSet(true))
+ realm.asyncExec(fireNodeListeners);
+ }
+
+ public void fireNodeListenersSync() {
+ try {
+ realm.syncExec(fireNodeListeners);
+ } catch (InterruptedException e) {
+ LOGGER.error("Synchronous node listener firing was interrupted.", e);
+ }
+ }
+
+ public void refreshVariables() {
+ realm.asyncExec(clearValueCache);
+ fireNodeListeners();
+ }
+
+ public void refreshVariablesSync() {
+ try {
+ realm.syncExec(clearValueCache);
+ } catch (InterruptedException e) {
+ LOGGER.error("Synchronous value cache refresh was interrupted.", e);
+ }
+ fireNodeListenersSync();
+ }
+
+ protected Variant getEngineVariantOrCached(Node node) throws NodeManagerException {
+ Variant variant = valueCache.get(node);
+ if(variant == null) {
+ Object value = realm.getEngine().getEngineValue(node);
+ Binding binding = realm.getEngine().getEngineBinding(node);
+ variant = new Variant(binding, value);
+ valueCache.put(node, variant);
+ }
+ return variant;
+ }
+
+ @Override
+ public Variant getValue(Node node) throws NodeManagerException {
+ checkThreadAccess();
+ return getEngineVariantOrCached(node);
+ }
+
+ protected void checkThreadAccess() throws NodeManagerException {
+ if(Thread.currentThread() != realm.getThread())
+ throw new NotInRealmException();
+ }
+
+ protected Datatype getDatatypeForValue(Object value) {
+ Binding binding = Bindings.getBindingUnchecked(value.getClass());
+ if(binding == null) return null;
+ else return binding.type();
+ }
+
+ @Override
+ public void setValue(Node node, Object value, Binding binding)
+ throws NodeManagerException {
+ checkThreadAccess();
+ Binding targetBinding = realm.getEngine().getEngineBinding(node);
+ if(binding.equals(targetBinding)) {
+ Variant variant = new Variant(binding, value);
+ valueCache.put(node, variant);
+ realm.getEngine().setEngineValue(node, value);
+ } else {
+ try {
+ Adapter adapter = Bindings.getAdapter(binding, targetBinding);
+ Object targetValue = adapter.adapt(value);
+ Variant variant = new Variant(targetBinding, targetValue);
+ valueCache.put(node, variant);
+ realm.getEngine().setEngineValue(node, targetValue);
+ } catch (AdapterConstructionException e) {
+ throw new NodeManagerException(e);
+ } catch (AdaptException e) {
+ throw new NodeManagerException(e);
+ }
+ }
+ refreshVariables();
+ }
+
+ @Override
+ public String getName(Node node) {
+ if(isRoot(node)) {
+ String id = getRealmId();
+ int lastSlash = id.lastIndexOf("/");
+ if(lastSlash == -1) throw new IllegalStateException("Invalid realm id " + id);
+ String name = id.substring(lastSlash+1);
+ return name;
+ } else {
+ return realm.getEngine().getName(node);
+ }
+ }
+
+ @Override
+ public Node getNode(String path) throws NodeManagerException {
+ checkThreadAccess();
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Node getChild(Node node, String name) throws NodeManagerException {
+ checkThreadAccess();
+ Map<String,Node> map = realm.getEngine().getChildren(node);
+ return map.get(name);
+ }
+
+ @Override
+ public Node getProperty(Node node, String name) throws NodeManagerException {
+ checkThreadAccess();
+ Map<String,Node> map = realm.getEngine().getProperties(node);
+ return map.get(name);
+ }
+
+ @Override
+ public List<Node> getChildren(Node node) throws NodeManagerException {
+ checkThreadAccess();
+ return new ArrayList<Node>(realm.getEngine().getChildren(node).values());
+ }
+
+ @Override
+ public List<Node> getProperties(Node node) throws NodeManagerException {
+ checkThreadAccess();
+ return new ArrayList<Node>(realm.getEngine().getProperties(node).values());
+ }
+
+ @Override
+ public Datatype getDatatype(Node node) throws NodeManagerException {
+ checkThreadAccess();
+ try {
+ Variant v = getEngineVariantOrCached(node);
+ Binding b = v.getBinding();
+ if(b == null) return null;
+ return b.type();
+ } catch (RuntimeBindingConstructionException e) {
+ // There is no datatype for all values
+ }
+ return null;
+ }
+
+ public void clear() {
+ valueCache.clear();
+ listeners.clear();
+ }
+
+}
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Code Review / simantics / platform.git / blobdiff