-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- * VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.browsing.ui.graph.impl.contribution;\r
-\r
-import java.util.Collection;\r
-\r
-import org.simantics.browsing.ui.BuiltinKeys;\r
-import org.simantics.browsing.ui.DataSource;\r
-import org.simantics.browsing.ui.NodeContext;\r
-import org.simantics.browsing.ui.PrimitiveQueryUpdater;\r
-import org.simantics.browsing.ui.Tester;\r
-import org.simantics.browsing.ui.content.ViewpointContribution;\r
-import org.simantics.browsing.ui.graph.impl.request.ResourceQuery;\r
-import org.simantics.db.AsyncReadGraph;\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.procedure.Listener;\r
-import org.simantics.db.procedure.Procedure;\r
-import org.simantics.utils.ui.ErrorLogger;\r
-\r
-/**\r
- * Implement {@link #children(AsyncReadGraph)} and {@link #hasChildren(AsyncReadGraph)}.\r
- * \r
- * @author Tuukka Lehtonen\r
- */\r
-abstract public class FinalViewpointContributionImpl extends ContributionStub implements GraphContribution {\r
-\r
- final private ResourceQuery<Collection<NodeContext>> childQuery;\r
- final private Procedure<Collection<NodeContext>> childProcedure;\r
-\r
- final protected PrimitiveQueryUpdater updater;\r
- final private NodeContext context;\r
- final private BuiltinKeys.ViewpointContributionKey key;\r
-\r
- /**\r
- * This identity is used to give the back-end graph requests a\r
- * <em>properly unique</em> identity that so that the graph back-end caching\r
- * and graph explorer node context caching work together properly.\r
- * \r
- * Consider having two graph explorer instances that have the same\r
- * configuration (same evaluators) and are showing the same resource from\r
- * the graph database. In this case the requests are actually meant to have\r
- * an identical identity and performing the graph request will simply bind a\r
- * new listener for the one and same request.\r
- * \r
- * @return an additional identity for graph back-end requests to make them\r
- * properly unique\r
- */\r
- public Object getIdentity() {\r
- return key;\r
- }\r
-\r
- public FinalViewpointContributionImpl(final PrimitiveQueryUpdater updater, NodeContext context, BuiltinKeys.ViewpointContributionKey key) {\r
-\r
- assert updater != null;\r
- assert context != null;\r
- assert key != null;\r
-\r
- this.updater = updater;\r
- this.context = context;\r
- this.key = key;\r
-\r
- this.childQuery = new ResourceQuery<Collection<NodeContext>>(getIdentity(), context) {\r
-\r
- @Override\r
- public Collection<NodeContext> perform(ReadGraph graph) throws DatabaseException {\r
- try {\r
- // Make sure that null is not returned.\r
- Collection<NodeContext> result = children(graph, context);\r
- if (result == null)\r
- throw new NullPointerException("LazyContributionImpl.children is not allowed to return null, but " + FinalViewpointContributionImpl.this.getClass() + " just did it");\r
- return result;\r
- } catch (DatabaseException e) {\r
- throw e;\r
- } catch (Throwable t) {\r
- ErrorLogger.defaultLogError("LazyContributionImpl.childQuery produced unexpected exception.", t);\r
- return ViewpointContribution.NO_CONTRIBUTION;\r
- }\r
- }\r
-\r
- @Override\r
- public String toString() {\r
- return "LazyContributionImpl[" + System.identityHashCode(FinalViewpointContributionImpl.this) + "].childQuery";\r
- }\r
-\r
- };\r
-\r
- childProcedure = createProcedure();\r
- \r
- }\r
- \r
- protected Procedure<Collection<NodeContext>> createProcedure() {\r
-\r
- return new Procedure<Collection<NodeContext>>() {\r
-\r
- @Override\r
- public void execute(Collection<NodeContext> result) {\r
- replaceChildrenResult(result);\r
- }\r
-\r
- public void exception(Throwable t) {\r
- ErrorLogger.defaultLogError("LazyContributionImpl.childQuery failed, see exception for details.", t);\r
- }\r
-\r
- @Override\r
- public String toString() {\r
- return "LazyContributionImpl[" + System.identityHashCode(FinalViewpointContributionImpl.this) + "].childProcedure";\r
- }\r
-\r
- };\r
- \r
- }\r
-\r
- public NodeContext getContext() {\r
- return context;\r
- }\r
-\r
- @Override\r
- public Collection<NodeContext> getContribution() {\r
-\r
- //System.out.println("LazyViewpoint2@" + System.identityHashCode(this) + " getChildren() = " + children.length);\r
-\r
- if (children == org.simantics.browsing.ui.content.ViewpointContribution.PENDING_CONTRIBUTION) {\r
- DataSource<ReadGraph> source = updater.getDataSource(ReadGraph.class);\r
- if (source != null) {\r
- source.schedule(graph -> {\r
- if(childProcedure instanceof Listener<?>)\r
- graph.asyncRequest(childQuery, (Listener<Collection<NodeContext>>)childProcedure);\r
- else \r
- graph.asyncRequest(childQuery, childProcedure);\r
- });\r
- }\r
- }\r
-\r
- //System.out.println("LazyViewpoint.getChildren returns " + children);\r
-\r
- return children;\r
-\r
- }\r
-\r
- protected void replaceChildrenResult(Collection<NodeContext> result) {\r
- setChildren(updater, result);\r
- updater.scheduleReplace(context, key, this);\r
- }\r
-\r
- /**\r
- * @param <T>\r
- * @param clazz\r
- * @return input of the specified class\r
- * @throws ClassCastException if the input class does not match the\r
- * specified class\r
- * @throws NullPointerException if the input is null\r
- */\r
- @SuppressWarnings("unchecked")\r
- protected <T> T getInput(Class<T> clazz) throws ClassCastException {\r
- Object o = context.getConstant(BuiltinKeys.INPUT);\r
- if (o == null)\r
- throw new NullPointerException("null input");\r
-// return clazz.cast(o);\r
- return (T) o;\r
- }\r
-\r
- /**\r
- * @param <T>\r
- * @param clazz\r
- * @return <code>null</code> if input is <code>null</code> or if the class does not match\r
- */\r
- @SuppressWarnings("unchecked")\r
- protected <T> T tryGetInput(Class<T> clazz) {\r
- Object o = context.getConstant(BuiltinKeys.INPUT);\r
- if (o != null && clazz.isInstance(o))\r
-// return clazz.cast(o);\r
- return (T) o;\r
- return null;\r
- }\r
-\r
- @Override\r
- public Tester getNodeContextTester() {\r
- return null;\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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
+ *******************************************************************************/
+package org.simantics.browsing.ui.graph.impl.contribution;
+
+import java.util.Collection;
+
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.DataSource;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.PrimitiveQueryUpdater;
+import org.simantics.browsing.ui.Tester;
+import org.simantics.browsing.ui.content.ViewpointContribution;
+import org.simantics.browsing.ui.graph.impl.request.ResourceQuery;
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.procedure.Listener;
+import org.simantics.db.procedure.Procedure;
+import org.simantics.utils.ui.ErrorLogger;
+
+/**
+ * Implement {@link #children(AsyncReadGraph)} and {@link #hasChildren(AsyncReadGraph)}.
+ *
+ * @author Tuukka Lehtonen
+ */
+abstract public class FinalViewpointContributionImpl extends ContributionStub implements GraphContribution {
+
+ final private ResourceQuery<Collection<NodeContext>> childQuery;
+ final private Procedure<Collection<NodeContext>> childProcedure;
+
+ final protected PrimitiveQueryUpdater updater;
+ final private NodeContext context;
+ final private BuiltinKeys.ViewpointContributionKey key;
+
+ /**
+ * This identity is used to give the back-end graph requests a
+ * <em>properly unique</em> identity that so that the graph back-end caching
+ * and graph explorer node context caching work together properly.
+ *
+ * Consider having two graph explorer instances that have the same
+ * configuration (same evaluators) and are showing the same resource from
+ * the graph database. In this case the requests are actually meant to have
+ * an identical identity and performing the graph request will simply bind a
+ * new listener for the one and same request.
+ *
+ * @return an additional identity for graph back-end requests to make them
+ * properly unique
+ */
+ public Object getIdentity() {
+ return key;
+ }
+
+ public FinalViewpointContributionImpl(final PrimitiveQueryUpdater updater, NodeContext context, BuiltinKeys.ViewpointContributionKey key) {
+
+ assert updater != null;
+ assert context != null;
+ assert key != null;
+
+ this.updater = updater;
+ this.context = context;
+ this.key = key;
+
+ this.childQuery = new ResourceQuery<Collection<NodeContext>>(getIdentity(), context) {
+
+ @Override
+ public Collection<NodeContext> perform(ReadGraph graph) throws DatabaseException {
+ try {
+ // Make sure that null is not returned.
+ Collection<NodeContext> result = children(graph, context);
+ if (result == null)
+ throw new NullPointerException("LazyContributionImpl.children is not allowed to return null, but " + FinalViewpointContributionImpl.this.getClass() + " just did it");
+ return result;
+ } catch (DatabaseException e) {
+ throw e;
+ } catch (Throwable t) {
+ ErrorLogger.defaultLogError("LazyContributionImpl.childQuery produced unexpected exception.", t);
+ return ViewpointContribution.NO_CONTRIBUTION;
+ }
+ }
+
+ @Override
+ public String toString() {
+ return "LazyContributionImpl[" + System.identityHashCode(FinalViewpointContributionImpl.this) + "].childQuery";
+ }
+
+ };
+
+ childProcedure = createProcedure();
+
+ }
+
+ protected Procedure<Collection<NodeContext>> createProcedure() {
+
+ return new Procedure<Collection<NodeContext>>() {
+
+ @Override
+ public void execute(Collection<NodeContext> result) {
+ replaceChildrenResult(result);
+ }
+
+ public void exception(Throwable t) {
+ ErrorLogger.defaultLogError("LazyContributionImpl.childQuery failed, see exception for details.", t);
+ }
+
+ @Override
+ public String toString() {
+ return "LazyContributionImpl[" + System.identityHashCode(FinalViewpointContributionImpl.this) + "].childProcedure";
+ }
+
+ };
+
+ }
+
+ public NodeContext getContext() {
+ return context;
+ }
+
+ @Override
+ public Collection<NodeContext> getContribution() {
+
+ //System.out.println("LazyViewpoint2@" + System.identityHashCode(this) + " getChildren() = " + children.length);
+
+ if (children == org.simantics.browsing.ui.content.ViewpointContribution.PENDING_CONTRIBUTION) {
+ DataSource<ReadGraph> source = updater.getDataSource(ReadGraph.class);
+ if (source != null) {
+ source.schedule(graph -> {
+ if(childProcedure instanceof Listener<?>)
+ graph.asyncRequest(childQuery, (Listener<Collection<NodeContext>>)childProcedure);
+ else
+ graph.asyncRequest(childQuery, childProcedure);
+ });
+ }
+ }
+
+ //System.out.println("LazyViewpoint.getChildren returns " + children);
+
+ return children;
+
+ }
+
+ protected void replaceChildrenResult(Collection<NodeContext> result) {
+ setChildren(updater, result);
+ updater.scheduleReplace(context, key, this);
+ }
+
+ /**
+ * @param <T>
+ * @param clazz
+ * @return input of the specified class
+ * @throws ClassCastException if the input class does not match the
+ * specified class
+ * @throws NullPointerException if the input is null
+ */
+ @SuppressWarnings("unchecked")
+ protected <T> T getInput(Class<T> clazz) throws ClassCastException {
+ Object o = context.getConstant(BuiltinKeys.INPUT);
+ if (o == null)
+ throw new NullPointerException("null input");
+// return clazz.cast(o);
+ return (T) o;
+ }
+
+ /**
+ * @param <T>
+ * @param clazz
+ * @return <code>null</code> if input is <code>null</code> or if the class does not match
+ */
+ @SuppressWarnings("unchecked")
+ protected <T> T tryGetInput(Class<T> clazz) {
+ Object o = context.getConstant(BuiltinKeys.INPUT);
+ if (o != null && clazz.isInstance(o))
+// return clazz.cast(o);
+ return (T) o;
+ return null;
+ }
+
+ @Override
+ public Tester getNodeContextTester() {
+ return null;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff